Veterinary sanitary assessment of mutton after application of antihelminth feed additive with albendazole / Avaliação sanitária veterinária de carneiro após aplicação de aditivo anti-helmíntico com albendazol

Abstract This study assessed the anthelminthic feed additive albendazole effect on the main indicators of the quality of sheep meat obtained from infected and deworming animals. A total of 20 heads of Akzhaik meat and wool sheep (i.e. 2 years of age, of different sex) were used in a 20-day experiment and 2 groups of 10 heads were formed (n = 4). The sheep were fed with the basic diet (i.e. control, group CON), without adding anything, and the second group was fed the basic diet orally with the addition of a dose of 1.2 g / head (an experimental group). At the end of the experiment, a control slaughter was carried out from each group in order to study the biochemical composition of meat and its quality. The anthelmintic feed additive albendazole did not have a significant effect on the indicators (organoleptic and physicochemical) of meat quality (P> 0.04). However, the ratio of fat and ash in the meat of the control group has differences in indicators and is reduced by 24.81% and 0.03%, respectively. The drug had a significant effect on the biological value of meat in the experimental group, where there is a higher content of essential amino acids (P = 0.06), nonessential (P = 0.05) concentrations in comparison with the CON groups. The results obtained show that the meat of the experimental groups of sheep, when using the anthelminthic feed additive albendazole, did not have a significant effect on organoleptic parameters, but significantly positively influenced the metabolism, live weight gain and biological value of meat.

Resumo Este estudo avaliou o efeito do aditivo anti-helmíntico albendazol sobre os principais indicadores de qualidade da carne ovina obtida de animais infectados e desparasitados. Um total de 20 cabeças de carne Akzhaik e ovelhas de lã (ou seja, 2 anos de idade, de sexo diferente) foi usado em um experimento de 20 dias e dois grupos de 10 cabeças foram formados (n = 4). As ovelhas foram alimentadas com dieta básica (ou seja, controle, grupo CON), sem adicionar nada, e o segundo grupo foi alimentado com dieta básica por via oral com a adição de uma dose de 1,2 g / cabeça (um grupo experimental). Ao final do experimento, foi realizado um abate controle de cada grupo para estudar a composição bioquímica da carne e sua qualidade. O aditivo anti-helmíntico albendazol não teve efeito significativo sobre os indicadores (organolépticos e físico-químicos) de qualidade da carne (P > 0,04). No entanto, a proporção de gordura e cinzas na carne do grupo de controle tem diferenças nos indicadores e é reduzida em 24,81% e 0,03%, respectivamente. A droga teve efeito significativo sobre o valor biológico da carne no grupo experimental, onde há maior teor de aminoácidos essenciais (P = 0,06), concentrações não essenciais (P = 0,05) em comparação com os grupos CON. Os resultados obtidos mostram que a carne dos grupos experimentais de ovinos, ao utilizar o aditivo anti-helmíntico albendazol, não teve efeito significativo nos parâmetros organolépticos, mas influenciou positivamente de forma significativa no metabolismo, ganho de peso vivo e valor biológico da carne.

Veterinary sanitary assessment of mutton after application of antihelminth feed additive with albendazole

Abstract This study assessed the anthelminthic feed additive albendazole effect on the main indicators of the quality of sheep meat obtained from infected and deworming animals. A total of 20 heads of Akzhaik meat and wool sheep (i.e. 2 years of age, of different sex) were used in a 20-day experiment and 2 groups of 10 heads were formed (n = 4). The sheep were fed with the basic diet (i.e. control, group CON), without adding anything, and the second group was fed the basic diet orally with the addition of a dose of 1.2 g / head (an experimental group). At the end of the experiment, a control slaughter was carried out from each group in order to study the biochemical composition of meat and its quality. The anthelmintic feed additive albendazole did not have a significant effect on the indicators (organoleptic and physicochemical) of meat quality (P> 0.04). However, the ratio of fat and ash in the meat of the control group has differences in indicators and is reduced by 24.81% and 0.03%, respectively. The drug had a significant effect on the biological value of meat in the experimental group, where there is a higher content of essential amino acids (P = 0.06), nonessential (P = 0.05) concentrations in comparison with the CON groups. The results obtained show that the meat of the experimental groups of sheep, when using the anthelminthic feed additive albendazole, did not have a significant effect on organoleptic parameters, but significantly positively influenced the metabolism, live weight gain and biological value of meat.

Resumo Este estudo avaliou o efeito do aditivo anti-helmíntico albendazol sobre os principais indicadores de qualidade da carne ovina obtida de animais infectados e desparasitados. Um total de 20 cabeças de carne Akzhaik e ovelhas de lã (ou seja, 2 anos de idade, de sexo diferente) foi usado em um experimento de 20 dias e dois grupos de 10 cabeças foram formados (n = 4). As ovelhas foram alimentadas com dieta básica (ou seja, controle, grupo CON), sem adicionar nada, e o segundo grupo foi alimentado com dieta básica por via oral com a adição de uma dose de 1,2 g / cabeça (um grupo experimental). Ao final do experimento, foi realizado um abate controle de cada grupo para estudar a composição bioquímica da carne e sua qualidade. O aditivo anti-helmíntico albendazol não teve efeito significativo sobre os indicadores (organolépticos e físico-químicos) de qualidade da carne (P > 0,04). No entanto, a proporção de gordura e cinzas na carne do grupo de controle tem diferenças nos indicadores e é reduzida em 24,81% e 0,03%, respectivamente. A droga teve efeito significativo sobre o valor biológico da carne no grupo experimental, onde há maior teor de aminoácidos essenciais (P = 0,06), concentrações não essenciais (P = 0,05) em comparação com os grupos CON. Os resultados obtidos mostram que a carne dos grupos experimentais de ovinos, ao utilizar o aditivo anti-helmíntico albendazol, não teve efeito significativo nos parâmetros organolépticos, mas influenciou positivamente de forma significativa no metabolismo, ganho de peso vivo e valor biológico da carne.

Limiting amino acids supplementation in low crude protein diets and their impacts on growth performance and carcass composition in Labeo rohita (rohu) adult fish / Limitação da suplementação de aminoácidos em dietas com baixo teor de proteína bruta e seus impactos no desempenho de crescimento e composição da carcaça em peixes adultos Labeo rohita (rohu)

Abstract Ninety days study was conducted in hapas installed in earthen ponds. Fish of an average initial weight (220g) were evenly distributed in triplicate groups within fifteen hapas. Five experimental diets labeled as T1 (25% CP and NRC recommended amino acid level) as control diet, T2 (with 2% low protein and 5% amino acid supplementation), T3 (with 2% low protein and 10% amino acid supplementation), T4 (with 4% low protein and 10% amino acid supplementation) and T5 (with 4% low protein and 20% amino acid supplementation) were prepared. Fish were fed with @3% of their body weight twice a day at 10.00 & 16:00 hour. Significantly higher percent weight gain (420.18 ± 66.84a) and specific growth rate (13499.33±1273.54a) along with improved feed conversion ratio (1.29 ± 0.09b) and hundred percent survivals were recorded during the trial. Furthermore proximate analysis of meat showed significant improvement in the crude protein level (81.77 ± 0.19a) served with diet containing 20% limiting amino acids mixture. Therefore, limiting amino acids can be a source of cost effective feed and use safely in L. rohita diet.

Resumo O estudo de 90 dias foi realizado em hapas instalados em tanques de terra. Peixes com peso inicial médio (220 g) foram distribuídos uniformemente em grupos triplicados em 15 hapas. Cinco dietas experimentais rotuladas como T1 (25% de CP e NRC recomendado nível de aminoácidos) como dieta controle, T2 (com 2% de proteína baixa e 5% de suplementação de aminoácidos), T3 (com 2% de proteína baixa e 10% de suplementação de aminoácidos), T4 (com 4% de baixa proteína e 10% de suplementação de aminoácidos) e T5 (com 4% de baixa proteína e 20% de suplementação de aminoácidos) foram preparadas. Os peixes foram alimentados com 3% do seu peso corporal duas vezes por dia às 10h00 e 16h00. Ganho de peso significativamente maior (420,18 ± 66,84a) e taxa de crescimento específico (13499,33 ± 1273,54a) juntamente com taxa de conversão alimentar melhorada (1, 29 ± 0,09b) e sobrevivência de cem por cento foram registrados durante o ensaio. Além disso, a análise aproximada da carne mostrou melhora significativa no nível de proteína bruta (81,77 ± 0,19a) servida com dieta contendo 20% de mistura de aminoácidos limitantes. Portanto, a limitação de aminoácidos pode ser uma fonte de alimentação econômica e usada com segurança na dieta de L. rohita.

Efficacy of acidified phytase supplemented cottonseed meal based diets on growth performance and proximate composition of Labeo rohita fingerlings / Eficácia de dietas à base de algodão com fitase acidificada suplementada no desempenho do crescimento e na composição proximada de dedos de Labeo rohita

Abstract The growth of aquaculture sector is strongly dependent upon the continuous supply of inexpensive fish feed with balanced nutritional profile. However, fish meal (FM) is unable to satisfy this demand due to its scarce supply and high cost. In order to test the potential of cottonseed meal (CSM) as a fish meal replacer, a feeding trial of 12 weeks was conducted to check growth performance and proximate composition of Labeo rohita fingerlings. The protein ration of the test feed was satisfied by replacing FM with CSM at 0, 25, 50 and 75%. Sixteen test diets viz., TD1 (control), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 and TD16 were supplemented with citric acid (CA; 0 and 2.5%) and phytase (PHY; 0 and 750 FTU/kg) in a completely randomized design with 3×3 factorial arrangement. The highest weight gain (11.03g), weight gain% (249.21%), specific growth rate (1.39) and best feed conversion ratio (1.20) were recorded by fish fed with TD12. Furthermore, the same level increased the crude protein (59.26%) and fat (16.04%) being significantly different (p<0.05) than that of control. Conclusively, the addition of acidified phytase (CA; 2.5%, PHY; 750 FTU/kg) in TD12 (CSM=50%) led to the improved growth and proximate composition of L. rohita fingerlings.

Resumo O crescimento do setor de aquicultura é fortemente dependente do fornecimento contínuo de rações baratas para peixes com perfil nutricional equilibrado. Porém, a farinha de peixe (FM) não consegue atender a essa demanda devido à sua escassa oferta e alto custo. Com o objetivo de testar o potencial da farinha de semente de canola (MSC) como substituto da farinha de peixe, um ensaio alimentar de 12 semanas foi conduzido para verificar o desempenho de crescimento e a composição centesimal de alevinos de Labeo rohita. A ração de proteína da ração teste foi satisfeita substituindo FM por CSM em 0, 25, 50 e 75%. Dezesseis dietas de teste, viz., TD1 (controle), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 e TD16 foram suplementadas com ácido cítrico (CA; 0 e 2,5%) e fitase (PHY; 0 e 750 FTU / kg) em um delineamento inteiramente casualizado com arranjo fatorial 3 × 3. O maior ganho de peso (11,03g), % de ganho de peso (249,21%), taxa de crescimento específico (1,39) e melhor taxa de conversão alimentar (1,20) foram registrados por peixes alimentados com TD12. Além disso, o mesmo nível aumentou a proteína bruta (59,26%) e a gordura (16,04%), sendo significativamente diferente (p <0,05) do controle. Conclusivamente, a adição de fitase acidificada (CA; 2,5%, PHY; 750 FTU / kg) em TD12 (CSM = 50%) levou a um melhor crescimento e composição próxima de alevinos de L. rohita.

Genetic diversity of Macroptilium accessions considering the increase in air temperature

Climate changes can influence the genetic diversity of forage plants, which may contribute to the improvement and development of new species. Therefore, this research aimed to evaluate the influence of temperature increase on the genetic diversity of Macroptilium accessions based on morphoagronomic descriptors. The experiment was carried out in a growth chamber in a 2×16 factorial arrangement (temperature regimes x Macroptilium accessions), with the temperatures consisting of T1 (20­26­33 °C) and T2 (24.8­30.8­37.8 °C) and 16 accessions. Eleven morphoagronomic descriptors allowed estimating the diversity among accessions. The measurements of genetic dissimilarity enabled us to observe the genetic distance between the studied materials, standing out the accessions T1.M3 and T2.S4 as the most divergent (446.01). The morphoagronomic descriptors percentage of leaves and stem diameter were the most efficient for estimating the diversity between access. Genetic variability points to the adaptation of Macroptilium accessions in the climate change scenario. The accessions more divergent can be explored in genetic breeding programs for the species aiming at the expansion of genetic variability as an adaptation mechanism to heat stress.

Does the mycotoxin ingestion by beef heifers on feedlot change the productive parameters?

In intensive beef cattle production systems, silage, corn, soy bean, and their coproducts are commonly used as feed. However, these ingredients are highly susceptible to contamination by fungi and mycotoxins, which may lead to immunological challenges and reduce animal production. The aim of the present study was to evaluate the effects of mycotoxin contamination of diet on intake, digestibility, and performance of heifers. Twenty non-pregnant (Nellore) heifers (age, >18 months; initial body weight, 348±30 kg) were used and randomly distributed in two treatments: (1) control (non-contaminated diet) and (2) zearalenone-contaminated diet (300 ppb). The diet comprised 70% corn silage and 30% concentrate. Individual dry matter intake and digestibility were estimated using external and internal markers. Heifer body weight was evaluated every week without fasting to calculate performance. The experimental design was completely randomized. Each animal was considered one experimental unit. Assumptions were tested for variance analyses (error normality, independence of errors, and homogeneity of variances) (p<0.05). There were no differences in dry matter intake (p=0.96) and digestibility (p=0.62). Performance (kg/day) did not vary as a function of zearalenone ingestion (p=0.68). Therefore, contamination of diet with 300 ppb zearalenone did not affect the intake, digestibility, and performance of feedlot-finished heifers.

Fermentative losses and lactic acid content of elephant grass silages added with macaúba cake

Elephant grass is indicated for silage production but requires additives to increase dry matter content because it reduces the production of effluents, potentially improves the fermentation pattern, and preserves the nutrients of the silage. This study aimed to evaluate the effects of including macaúba cake in elephant grass ensilage on dry matter content, lactic acid bacteria population, lactic acid production, pH values, losses by gases and effluents, and dry matter recovery. The experimental design was completely randomized, in a 3x6 factorial scheme, with three levels of inclusion of macaúba cake (0, 10, and 20%) and six opening times (1, 5, 10, 20, 40, and 60 days after ensilage), with four repetitions. Macaúba cake was an effective moisture-absorbing additive, increasing dry matter content, lactic acid bacteria population, and lactic acid content and reducing the pH. The losses by effluents and gases decreased, and dry matter recovery increased with the addition of this biodiesel co-product. The 20% level of inclusion of macaúba cake in elephant grass ensilage allowed for better preserving the ensiled material.

Prevalence and antimicrobial resistance of Escherichia coli and Salmonella spp. in animal feed in Colombia / Prevalencia y resistencia a los antimicrobianos de Escherichia coli y Salmonella spp. en los alimentos para animales en Colombia / Prevalência e resistência a antimicrobianos de Escherichia coli e Salmonella spp. em ração animal na Colômbia

ABSTRACT Objective. To determine the prevalence and antimicrobial resistance of Escherichia coli and Salmonella spp. in animal feed samples collected between 2018 and 2021 in Colombia. Methods. This was a laboratory-based cross-sectional study using routine data from the program for inspection, surveillance, and control of animal feed at the Colombian Agriculture Institute. Samples of animal feed for swine, poultry, canine, feline, leporine, piscine, and equine species were processed for detection of E. coli and Salmonella spp. using enrichment and selective culture methods. Isolates were tested for antimicrobial susceptibility using an automated microdilution method. Results. Of 1 748 animal feed samples analyzed, 83 (4.7%) were positive for E. coli and 66 (3.8%) for Salmonella spp. The presence of E. coli and Salmonella spp. was highest in feed for poultry (6.4% and 5.5%) and swine (6.1% and 4.3%). Antimicrobial resistance testing was performed in 27 (33%) E. coli isolates and 26 (39%) Salmonella isolates. Among E. coli, resistance was most frequently observed to ampicillin (44.5%) followed by cefazolin (33.3%), ciprofloxacin (29.6%), ampicillin/sulbactam (26%), and ceftriaxone (11.1%). The highest resistance levels in Salmonella spp. isolates were against cefazolin (7.7%) and piperacillin/tazobactam (7.7%). Conclusions. This is the first study from Colombia reporting on the prevalence and antimicrobial resistance of E. coli and Salmonella spp. in animal feed samples. Its results establish a baseline over a wide geographical distribution in Colombia. It highlights the need to integrate antimicrobial resistance surveillance in animal feed due to the emergence of resistant bacteria in this important stage of the supply chain.

RESUMEN Objetivo. Determinar la prevalencia y resistencia a los antimicrobianos de Escherichia coli y Salmonella spp. en muestras de piensos para animales tomadas entre el 2018 y el 2021 en Colombia. Métodos. Se trata de un estudio transversal realizado en el laboratorio a partir de los datos regulares del programa de inspección, vigilancia y control de alimentos para animales del Instituto Colombiano Agropecuario. Se procesaron muestras de alimentos utilizados en la cría de cerdos, aves de corral, cánidos, félidos, lepóridos, peces y equinos con el fin de detectar E. coli y Salmonella spp. por medio de métodos de enriquecimiento y cultivo selectivo. Se analizó la sensibilidad a los antimicrobianos de las cepas aisladas mediante microdilución automatizada. Resultados. De 1748 muestras de alimentos analizadas, 83 (4,7%) resultaron positivas para E. coli y 66 (3,8%) para Salmonella spp. La presencia de E. coli y Salmonella spp. fue mayor en los alimentos para aves de corral (6,4% y 5,5%) y cerdos (6,1% y 4,3%). Se realizaron pruebas de resistencia a los antimicrobianos en 27 (33%) cepas de E. coli y 26 (39%) de Salmonella. En las cepas de E. coli, se observó una mayor resistencia a la ampicilina (44,5%), seguida de la resistencia a la cefazolina (33,3%), la ciprofloxacina (29,6%), la ampicilina/sulbactam (26%) y la ceftriaxona (11,1%). En el caso de las cepas de Salmonella spp., los niveles de resistencia más elevados fueron para la cefazolina (7,7%) y piperacilina/tazobactam (7,7%). Conclusiones. Este es el primer estudio realizado en Colombia en el que se informa sobre la prevalencia y la resistencia a los antimicrobianos de E. coli y Salmonella spp. en muestras de alimentos para animales. Sus resultados establecen una línea de base para una zona geográfica mucho mayor dentro de Colombia. Se subraya la necesidad de integrar la vigilancia de la resistencia a los antimicrobianos en los alimentos para animales debido a la aparición de bacterias resistentes en esta importante etapa de la cadena de suministro.

RESUMO Objetivo. Determinar a prevalência e a resistência a antimicrobianos de Escherichia coli e Salmonela spp. em amostras de ração animal coletadas entre 2018 e 2021 na Colômbia. Métodos. Estudo transversal de base laboratorial, usando dados de rotina do programa de inspeção, vigilância e controle de ração animal do Instituto Colombiano de Agricultura. Amostras de ração animal para as espécies suína, avícola, canina, felina, leporina, piscina e equina foram processadas para detecção de E. coli e Salmonella spp., usando métodos de enriquecimento e cultura seletiva. Os isolados foram testados quanto à suscetibilidade a antimicrobianos usando um método automatizado de microdiluição. Resultados. Das 1.748 amostras de ração animal analisadas, 83 (4,7%) foram positivas para E. coli e 66 (3,8%) para Salmonella spp. A presença de E. coli e Salmonella spp. foi maior em rações para aves (6,4% e 5,5%) e suínos (6,1% e 4,3%). O teste de resistência a antimicrobianos foi realizado em 27 (33%) isolados de E. coli e 26 (39%) isolados de Salmonella. Em E. coli, a resistência observada com maior frequência foi à ampicilina (44,5%), seguida da cefazolina (33,3%), ciprofloxacino (29,6%), ampicilina/sulbactam (26%) e ceftriaxona (11,1%). Os maiores níveis de resistência em isolados de Salmonella spp. foram contra cefazolina (7,7%) e piperacilina/tazobactam (7,7%). Conclusões. Este é o primeiro estudo da Colômbia a notificar a prevalência e resistência a antimicrobianos de E. coli e Salmonella spp. em amostras de ração animal. Os resultados estabelecem uma linha de base com ampla distribuição geográfica na Colômbia. Destaca-se a necessidade de integrar a vigilância da resistência a antimicrobianos na ração animal, devido ao surgimento de bactérias resistentes nesta importante etapa da cadeia de abastecimento.

Efficacy of acidified phytase supplemented cottonseed meal based diets on growth performance and proximate composition of Labeo rohita fingerlings / Eficácia de dietas à base de algodão com fitase acidificada suplementada no desempenho do crescimento e na composição proximada de dedos de Labeo rohita

The growth of aquaculture sector is strongly dependent upon the continuous supply of inexpensive fish feed with balanced nutritional profile. However, fish meal (FM) is unable to satisfy this demand due to its scarce supply and high cost. In order to test the potential of cottonseed meal (CSM) as a fish meal replacer, a feeding trial of 12 weeks was conducted to check growth performance and proximate composition of Labeo rohita fingerlings. The protein ration of the test feed was satisfied by replacing FM with CSM at 0, 25, 50 and 75%. Sixteen test diets viz., TD1 (control), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 and TD16 were supplemented with citric acid (CA; 0 and 2.5%) and phytase (PHY; 0 and 750 FTU/kg) in a completely randomized design with 3×3 factorial arrangement. The highest weight gain (11.03g), weight gain% (249.21%), specific growth rate (1.39) and best feed conversion ratio (1.20) were recorded by fish fed with TD12. Furthermore, the same level increased the crude protein (59.26%) and fat (16.04%) being significantly different (p<0.05) than that of control. Conclusively, the addition of acidified phytase (CA; 2.5%, PHY; 750 FTU/kg) in TD12 (CSM=50%) led to the improved growth and proximate composition of L. rohita fingerlings.

O crescimento do setor de aquicultura é fortemente dependente do fornecimento contínuo de rações baratas para peixes com perfil nutricional equilibrado. Porém, a farinha de peixe (FM) não consegue atender a essa demanda devido à sua escassa oferta e alto custo. Com o objetivo de testar o potencial da farinha de semente de canola (MSC) como substituto da farinha de peixe, um ensaio alimentar de 12 semanas foi conduzido para verificar o desempenho de crescimento e a composição centesimal de alevinos de Labeo rohita. A ração de proteína da ração teste foi satisfeita substituindo FM por CSM em 0, 25, 50 e 75%. Dezesseis dietas de teste, viz., TD1 (controle), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 e TD16 foram suplementadas com ácido cítrico (CA; 0 e 2,5%) e fitase (PHY; 0 e 750 FTU / kg) em um delineamento inteiramente casualizado com arranjo fatorial 3 × 3. O maior ganho de peso (11,03g), % de ganho de peso (249,21%), taxa de crescimento específico (1,39) e melhor taxa de conversão alimentar (1,20) foram registrados por peixes alimentados com TD12. Além disso, o mesmo nível aumentou a proteína bruta (59,26%) e a gordura (16,04%), sendo significativamente diferente (p <0,05) do controle. Conclusivamente, a adição de fitase acidificada (CA; 2,5%, PHY; 750 FTU / kg) em TD12 (CSM = 50%) levou a um melhor crescimento e composição próxima de alevinos de L. rohita.

Limiting amino acids supplementation in low crude protein diets and their impacts on growth performance and carcass composition in Labeo rohita (rohu) adult fish / Limitação da suplementação de aminoácidos em dietas com baixo teor de proteína bruta e seus impactos no desempenho de crescimento e composição da carcaça em peixes adultos Labeo rohita (rohu)

Ninety days study was conducted in hapas installed in earthen ponds. Fish of an average initial weight (220g) were evenly distributed in triplicate groups within fifteen hapas. Five experimental diets labeled as T1 (25% CP and NRC recommended amino acid level) as control diet, T2 (with 2% low protein and 5% amino acid supplementation), T3 (with 2% low protein and 10% amino acid supplementation), T4 (with 4% low protein and 10% amino acid supplementation) and T5 (with 4% low protein and 20% amino acid supplementation) were prepared. Fish were fed with @3% of their body weight twice a day at 10.00 & 16:00 hour. Significantly higher percent weight gain (420.18 ± 66.84a) and specific growth rate (13499.33±1273.54a) along with improved feed conversion ratio (1.29 ± 0.09b) and hundred percent survivals were recorded during the trial. Furthermore proximate analysis of meat showed significant improvement in the crude protein level (81.77 ± 0.19a) served with diet containing 20% limiting amino acids mixture. Therefore, limiting amino acids can be a source of cost effective feed and use safely in L. rohita diet.

O estudo de 90 dias foi realizado em hapas instalados em tanques de terra. Peixes com peso inicial médio (220 g) foram distribuídos uniformemente em grupos triplicados em 15 hapas. Cinco dietas experimentais rotuladas como T1 (25% de CP e NRC recomendado nível de aminoácidos) como dieta controle, T2 (com 2% de proteína baixa e 5% de suplementação de aminoácidos), T3 (com 2% de proteína baixa e 10% de suplementação de aminoácidos), T4 (com 4% de baixa proteína e 10% de suplementação de aminoácidos) e T5 (com 4% de baixa proteína e 20% de suplementação de aminoácidos) foram preparadas. Os peixes foram alimentados com 3% do seu peso corporal duas vezes por dia às 10h00 e 16h00. Ganho de peso significativamente maior (420,18 ± 66,84a) e taxa de crescimento específico (13499,33 ± 1273,54a) juntamente com taxa de conversão alimentar melhorada (1, 29 ± 0,09b) e sobrevivência de cem por cento foram registrados durante o ensaio. Além disso, a análise aproximada da carne mostrou melhora significativa no nível de proteína bruta (81,77 ± 0,19a) servida com dieta contendo 20% de mistura de aminoácidos limitantes. Portanto, a limitação de aminoácidos pode ser uma fonte de alimentação econômica e usada com segurança na dieta de L. rohita.

Efficacy of acidified phytase supplemented cottonseed meal based diets on growth performance and proximate composition of Labeo rohita fingerlings

Abstract The growth of aquaculture sector is strongly dependent upon the continuous supply of inexpensive fish feed with balanced nutritional profile. However, fish meal (FM) is unable to satisfy this demand due to its scarce supply and high cost. In order to test the potential of cottonseed meal (CSM) as a fish meal replacer, a feeding trial of 12 weeks was conducted to check growth performance and proximate composition of Labeo rohita fingerlings. The protein ration of the test feed was satisfied by replacing FM with CSM at 0, 25, 50 and 75%. Sixteen test diets viz., TD1 (control), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 and TD16 were supplemented with citric acid (CA; 0 and 2.5%) and phytase (PHY; 0 and 750 FTU/kg) in a completely randomized design with 3×3 factorial arrangement. The highest weight gain (11.03g), weight gain% (249.21%), specific growth rate (1.39) and best feed conversion ratio (1.20) were recorded by fish fed with TD12. Furthermore, the same level increased the crude protein (59.26%) and fat (16.04%) being significantly different (p 0.05) than that of control. Conclusively, the addition of acidified phytase (CA; 2.5%, PHY; 750 FTU/kg) in TD12 (CSM=50%) led to the improved growth and proximate composition of L. rohita fingerlings.

Resumo O crescimento do setor de aquicultura é fortemente dependente do fornecimento contínuo de rações baratas para peixes com perfil nutricional equilibrado. Porém, a farinha de peixe (FM) não consegue atender a essa demanda devido à sua escassa oferta e alto custo. Com o objetivo de testar o potencial da farinha de semente de canola (MSC) como substituto da farinha de peixe, um ensaio alimentar de 12 semanas foi conduzido para verificar o desempenho de crescimento e a composição centesimal de alevinos de Labeo rohita. A ração de proteína da ração teste foi satisfeita substituindo FM por CSM em 0, 25, 50 e 75%. Dezesseis dietas de teste, viz., TD1 (controle), TD2, TD3, TD4, TD5, TD6, TD7, TD8, TD9, TD10, TD11, TD12, TD13, TD14, TD15 e TD16 foram suplementadas com ácido cítrico (CA; 0 e 2,5%) e fitase (PHY; 0 e 750 FTU / kg) em um delineamento inteiramente casualizado com arranjo fatorial 3 × 3. O maior ganho de peso (11,03g), % de ganho de peso (249,21%), taxa de crescimento específico (1,39) e melhor taxa de conversão alimentar (1,20) foram registrados por peixes alimentados com TD12. Além disso, o mesmo nível aumentou a proteína bruta (59,26%) e a gordura (16,04%), sendo significativamente diferente (p 0,05) do controle. Conclusivamente, a adição de fitase acidificada (CA; 2,5%, PHY; 750 FTU / kg) em TD12 (CSM = 50%) levou a um melhor crescimento e composição próxima de alevinos de L. rohita.

Limiting amino acids supplementation in low crude protein diets and their impacts on growth performance and carcass composition in Labeo rohita (rohu) adult fish

Abstract Ninety days study was conducted in hapas installed in earthen ponds. Fish of an average initial weight (220g) were evenly distributed in triplicate groups within fifteen hapas. Five experimental diets labeled as T1 (25% CP and NRC recommended amino acid level) as control diet, T2 (with 2% low protein and 5% amino acid supplementation), T3 (with 2% low protein and 10% amino acid supplementation), T4 (with 4% low protein and 10% amino acid supplementation) and T5 (with 4% low protein and 20% amino acid supplementation) were prepared. Fish were fed with @3% of their body weight twice a day at 10.00 & 16:00 hour. Significantly higher percent weight gain (420.18 ± 66.84a) and specific growth rate (13499.33±1273.54a) along with improved feed conversion ratio (1.29 ± 0.09b) and hundred percent survivals were recorded during the trial. Furthermore proximate analysis of meat showed significant improvement in the crude protein level (81.77 ± 0.19a) served with diet containing 20% limiting amino acids mixture. Therefore, limiting amino acids can be a source of cost effective feed and use safely in L. rohita diet.

Resumo O estudo de 90 dias foi realizado em hapas instalados em tanques de terra. Peixes com peso inicial médio (220 g) foram distribuídos uniformemente em grupos triplicados em 15 hapas. Cinco dietas experimentais rotuladas como T1 (25% de CP e NRC recomendado nível de aminoácidos) como dieta controle, T2 (com 2% de proteína baixa e 5% de suplementação de aminoácidos), T3 (com 2% de proteína baixa e 10% de suplementação de aminoácidos), T4 (com 4% de baixa proteína e 10% de suplementação de aminoácidos) e T5 (com 4% de baixa proteína e 20% de suplementação de aminoácidos) foram preparadas. Os peixes foram alimentados com 3% do seu peso corporal duas vezes por dia às 10h00 e 16h00. Ganho de peso significativamente maior (420,18 ± 66,84a) e taxa de crescimento específico (13499,33 ± 1273,54a) juntamente com taxa de conversão alimentar melhorada (1, 29 ± 0,09b) e sobrevivência de cem por cento foram registrados durante o ensaio. Além disso, a análise aproximada da carne mostrou melhora significativa no nível de proteína bruta (81,77 ± 0,19a) servida com dieta contendo 20% de mistura de aminoácidos limitantes. Portanto, a limitação de aminoácidos pode ser uma fonte de alimentação econômica e usada com segurança na dieta de L. rohita.

Application of scientific research materials such as endemic diseases in the ideological and political education of "Environmental Hygiene" course / 中华地方病学杂志

"Environmental Hygiene" is one of the professional courses for undergraduates majoring in preventive medicine, which plays an important role in cultivating students' patriotism and consciousness of reform and innovation. However, due to the limitations of the traditional teaching mode of professional courses that focus on teaching professional knowledge and skills and pay little attention to ideological and political education, it fails to inspire students' consciousness of reform and innovation, and it is difficult to build a high-quality team of preventive medicine professionals with patriotic feelings. In this study, the classroom teaching and practical teaching of this course are fed back by scientific research achievements, expert's example demonstration, scientific research progress and scientific research practice of scientific researches such as endemic diseases, aiming to cultivate high-quality public health talents with firm ideals and beliefs, patriotic feelings, innovation ability and solidarity and collaboration spirit. This study can also provide reference for the study of ideological and political teaching of relevant professional courses.

Opinion on the Safety of BioProtein® by the Scientific Panel on Animal Feed of the Norwegian Scientific Committee for Food Safety

BioProtein® (BP) is a trademark for single cell (bacteria) protein, based on conversion of methane, with the addition of ammonia and oxygen, to a protein source. BP is produced by Norferm AS in Norway, and has been authorized by the EU as a protein source in animal feeds since 1995, for fattening pigs (8%), calves (8%) and salmon (19-33%). Significant immune effects were revealed in a toxicity study performed in rats fed a nucleic acid reduced BP product (NABP) and thereafter, similar, but less severe effects were also found after feeding with untreated BP. Additional studies confirmed increased mesenteric lymph node weights in cats and foxes. Due to the undesirable effects and also due to applications for extended use, BP has been assessed by the Scientific Committee on Animal Nutrition (SCAN) and EU’s Scientific Committee on Food (SCF) in 1995, by SCAN in 2001 and 2003 and by the European Food Safety Authority (EFSA) in 2005. The EU memberstates United Kingdom, France and Finland have also conducted assessments. The EU approval from 1995 remains unchanged. The Norwegian Food Safety Authority requested the Norwegian Scientific Committee for Food Safety (VKM) to assess the risk of using BP as a protein source in feedingstuffs, both for the animal categories already authorized and for extended use to pet animals, chickens and pigs from weaning to slaughter. The Norwegian Scientific Committee for Food Safety was asked to consider all existing documentation. Based on all documentation enclosed with the request from the Norwegian Food Safety Authority and published scientific articels, an opinion on the safety of BP assessed by the VKM panel on Animal Feed was published on 20 March 2006 (05/608-final-rev1). The Producer made a complaint regarding this opinion and claimed that not all documents on BP had been evaluated. The Norwegian Food Safety Authority then requested VKM to revise its opinion on the risk of using BP as a protein source in feedingstuffs, based on 17 documents previously not available to VKM, in addition to the 20 documents included in the opinion published on 20 March 2006. BP is composed of a protein with a somewhat different amino acid compostion compared with fish meal, but BP and fish meal have more similarities in amino acid content than soybean meal. BP has relatively high level of nucleic acids, phospholipids, lipopolysaccarides and minerals. Effect studies with BP have been conducted in rats/mice, pigs, chicken, cats, foxes, and salmon. Most of the concern regarding the side effects of BP in feed is related to the immune response. The main findings include changes in weight and morphology of mesenteric lymph nodes, followed by induction of specific antibodies. Histopathological examination after feeding with NABP also revealed changes in the intestines and several internal organs indicating systemic effects. The Producer claims that the immune response seen in BP-fed mice/rats is most likely a normal response to ingestion of large doses of a foreign antigen, and further, that oral tolerance towards this protein is induced over time. However, these interpretations are not adequately supported by the supplied documentation. A tendency towards adaption might be indicated in some of the studies, other results argue against tolerance induction. It is unclear whether the content of phospholipids, lipopolysaccarides, nucleic acids or the protein structure, or the combination of these compounds is responsible for the immunological changes observed. However, the particulate structure of BP has been shown to influence the observed immune response as the systemic immune response was avoided by ingestion of BP free of whole cells. The studies conducted in target species have not included adequate examinations of the immune effects from ingestion of BP. Concerning terrestrial species, no histopathological effects were revealed in the pig, chicken, cat or fox studies. However, increased mesenteric lymph nodes were reported in cats and foxes fed BP. In the remaining studies the main focus has been on production parameters; weight gain, feed intake, feed efficiency, metabolism of nutrients, observation of clinical health, and product quality. When the contents of amino acids were balanced, the inclusion of low levels of BP (9%) tended to stimulate growth in pigs and the same tendency was found in chicken with 6% BP. Higher feed levels of BP tended to cause a reduction in growth. In salmon, a dose dependent improvement of growth was reported in a short term experiment (8 weeks). However, in longer term experiments with salmon, depressed growth and increased liver weight were observed in freshwater at 19% BP with no-effect-level at 10%. In seawater studies, a tendency of reduced growth was found in salmon fed with 20% BP in the diet, and BP levels of 27% and higher levels resulted in significantly reduced body weight. Furthermore, levels of 27% BP and above in fish feed reduced specific immune responses, but increased lymphocyte response, and also tended to improve the survival after bacterial and viral infections. At 37% BP in the diet histopathological changes in the distal intestine, and reduced storage of glycogen and increased lipid deposition and liver weight were observed. No negative effects were seen in salmon in seawater at a feed level of 13.5% BP. The results indicate negative effects in salmon at BP levels in fish feed considerably lower than those currently approved (19 and 33%, in feed for salmon in fresh and sea water, respectively). To conclude, in terrestrial target species documented effects of BP include reduced weight gain and increased weight of mesenteric lymph nodes. In the more thoroughly studied species the rat, findings incluse histopathologic effects in mesenteric lymph nodes, changed humoral immune responses, increased weight of other lymphoid tissue (spleen), increased level of neutrophile granulocytes, and slight leakage of hepatic and renal tubuli enzymes. In terrestrial target species, 6% BP in the feed is considered to be the highest inclusion level not to cause such effects. The results from the rat studies show a similar no-effect-level. In salmon, reduced weight gain, liver storage effects, changed humoral and celluar immune responses and histopathological effects in the intestine are documented. A 10% level of BP in fish feed is the highest level tested without causing such effects. There are relatively few valid studies for the risk assessment of BP in target species, and the designs of the assessed studies are very variable. Thus, there are qualitative and quantitative uncertainties concerning the effects of BP in target species. The Panel on Animal Feed is of the opinion that an inclusion level of BP of 6% in the diets to terrestrial target animals and a 10% maximum inclusion level in salmon feed (both for fresh- and seawater stages) would reduce the risk of potentially adverse effects in the animals. The risk associated with the human consumption of products from animals fed on BP is considered negligible. However, the production of single cell protein for feed production represents a relatively new scientific approach which implies precautionary handling.

Colombian vs. American corn: Quality, chemical composition, mycotoxin content and metabolizable energy

Background: Corn is, quantitatively, one of the most important world crops (ranking second only after wheat) and a key ingredient in animal feeds. Objective: to assess and compare corn quality, mycotoxin content, chemical composition and apparent metabolizable energy (AME) of domestic and imported corn. Methods: Grain quality (USDA grading system) was determined in 30 samples of domestic and 21 samples of imported corn. From each origin, 15 samples were subjected to proximal analysis and 10 were used to determine fatty acid composition. Mycotoxin analysis was conducted on 30 samples of domestic and 23 of imported corn. Results: six of the 30 domestic samples corresponded to US1 grade (highest quality) vs. none of the imported. In the "sample grade" category (lowest quality), 10 and 6 samples corresponded to imported and domestic corn, respectively. Soybeans were found as contaminant in 15 of the 21 imported corn samples. Aspergillus spp. mycotoxins such as ochratoxin A were not detected, and aflatoxins were found in only a few samples at very low levels. Fusariotoxins such as deoxynivalenol and zearalenone were found in 61 and 43% of imported samples, respectively, but in none of the domestic samples. Domestic corn had lower carbohydrate content compared with imported corn (85.4 vs. 86.7%), but higher crude fat (3.8 vs. 3.1%). The AME values for domestic and imported corn were 3,697 and 3,378 kcal/kg, respectively. The fatty acid profiles from both corn types were similar. Conclusion: This study found significant differences between locally-grown and imported corn, particularly in terms of crude fat, AME content, fusariotoxins, and contaminant seeds (soybeans). These findings suggest that locally-grown corn might have nutritional and toxicological advantages over corn imported from the United States.

Antecedentes: El maíz es, cuantitativamente, uno de los cultivos más importantes a nivel mundial (ocupa el segundo lugar después del trigo) y uno de los principales ingredientes en dietas para animales. Objetivo: Evaluar y comparar la calidad del maíz, su contenido de micotoxinas, composición química, y energía metabolizable aparente (AME) del maíz nacional e importado. Métodos: La calidad del grano (sistema de clasificación de la USDA) se determinó en 30 muestras de maíz producido en Colombia y 21 de maíz importado. De cada origen, 15 muestras se sometieron a análisis proximal y 10 se analizaron para determinar el perfil de ácidos grasos. El contenido de micotoxinas se determinó en 30 muestras de maíz nacional y 23 de maíz importado. Resultados: Seis de las treinta muestras nacionales analizadas para calidad de grano correspondieron a grado US1 (la mejor calidad) frente a ninguna de las importadas. En categoría "grado muestra" (la menor calidad) se encontraron 10 y 6 de las muestras de maíz importado y nacional, respectivamente; 15 de las 21 muestras de maíz importado presentaron contaminación con semillas de fríjol soya. No se encontraron micotoxinas de hongos Aspergillus spp. (ocratoxina A), y niveles muy bajos de aflatoxinas en unas pocas muestras. Fusariotoxinas tales como deoxinivalenol y zearalenona se detectaron en el 61 y 43% de las muestras de maíz importado, respectivamente, pero en ninguna muestra de maíz nacional. El maíz nacional presentó menor contenido de carbohidratos (85,4 vs. 86,7%), pero mayor contenido de grasa cruda (3,8 vs. 3,1%) en comparación con el importado, respectivamente. Los valores de AME fueron de 3.697 y 3.378 kcal/kg para el maíz nacional e importado, respectivamente. El perfil de ácidos grasos de ambas procedencias fue similar. Conclusiones: Este estudio encontró diferencias significativas entre el maíz de producción nacional y el importado, en especial en su contenido de grasa cruda y AME, fusariotoxinas, y semillas contaminates (soya). Estos hallazgos sugieren que el maíz de producción nacional puede presentar ventajas de tipo nutricional y toxicológico frente al maíz importado de los Estados Unidos de América.

Antecedentes: O milho é quantitativamente uma das culturas mais importantes em nível mundial (ocupando o segundo lugar depois do trigo), sendo um dos principais ingredientes em dietas para animais. Objetivo: Avaliar e comparar a qualidade do milho, o teor de micotoxinas, a composição química e a energia metabolizável aparente (EMA) do milho nacional e importado. Métodos: A qualidade do grão (sistema de classificação do USDA) foi determinada em 30 amostras de milho produzido na Colômbia e 21 amostras de milho importado. Quinze amostras de cada tipo de milho foram submetidas a análise proximal e dez amostras de cada milho foram analisadas para determinar o perfil de ácidos graxos. O conteúdo de micotoxinas foi determinado em 30 amostras de milho da Colômbia e em 23 amostras de milho importado. Resultados: Seis das trinta amostras colombianas analisadas para qualidade de grão corresponderam a grau US1 (melhor qualidade) frente a nenhuma das amostras importadas. Na categoria "grau amostra" (menor qualidade) foram encontradas 10 e 6 amostras de milhos importados e colombianos, respectivamente; Quinze das 21 amostras de milho importado apresentaram contaminação com sementes de feijão soja. Não foram encontradas micotoxinas de fungos Aspergillus spp. (ocratoxina A) ou apenas níveis muito baixos em poucas amostras (aflatoxinas). As fusariotoxinas, deoxinivalenol e zearalenona foram detectadas em 61 e 43% das amostras de milho importado, respectivamente, mas não foram detectadas em nenhuma amostra do milho colombiano. O milho colombiano apresentou menor conteúdo de carboidratos (85,4 vs. 86,7%) porém maior conteúdo de gordura crua (3,8 vs. 3,1%). Os valores de AME foram 3.697 e 3.378 kcal/kg para as amostras de milho colombiano e importado, respectivamente. O perfil de ácidos graxos de ambos tipos de milho foi similar. Conclusões: Os resultados do presente estudo mostram diferenças significativas entre o milho de origem colombiana e o milho importado dos Estados Unidos, em especial no conteúdo de gordura crua e AME, fusariotoxinas e sementes contaminantes (soja). Estes achados sugerem que o milho de produção colombiana pode apresentar vantagens de tipo nutricional e toxicológica frente ao milho importado dos Estados Unidos.

Objective Assessment of Superiority of Enteral Feeding by Traditional Home Kitchen-Based Feed V/S Commercial Formula Feed in Patients of Esophagogastric Corrosive Injury

Background: Corrosive ingestion can cause severe chemical injury to upper gastrointestinal tract which leads to dysphagia, malnutrition and weight loss. Early nutritional assessment and support through feeding jejunostomy is important and it should be nutritionally optimum and economically balanced. The aim is to compare cost and nutritional status after nutritional support with traditional home kitchen made and commercial formula feed through feeding jejunostomy.Methods:A prospective study included patients on enteral nutrition based on traditional home kitchen feed (cohort-1) and on commercial formula feed (cohort-2). Patient抯 body weight, BMI, haemoglobin, serum albumin, nutritional risk index, controlling nutritional status score were checked at the admission, 3rd and 6th month follow up.Results: In cohort 1 mean albumin and haemoglobin raised by 33.13% & 14.60% at 3rd month and 47.23% & 22.3% at 6th month respectively; In cohort 2 it was 9.12% & 2.69% at 3rd month and 17.62% & 6.53% at 6th month respectively. At 6th month in cohort 1 and 2 mean weight gain was 7.56% & 4.0%; mean increase in NRI was 34.78% & 11.5% respectively. Mean CONUT score at six months was better improved in cohort 1 which is 6 to 1 as compared to cohort 2 which was 6 to 3. Mean monthly cost of home-based feeds was significantly lower as compared to commercial feeds (62.14 Rs v/s 682-2354 Rs/day).Conclusions:In corrosive GI tract injury patient enteral nutrition with traditional home kitchen-based feeds is safe, cost effective and associated with better improvement in nutritional status objective parameters.

The use of the larvae of Zophobas morio and galleria mellonella in feeding growing pigs

Insects represent a promising alternative source to more expensive components of the feeding regimen of farm animals for meat production. With this aim in mind, we conducted this experiment to investigate the effects of dried larvae of darkling beetles (Zophobas morio L.) and larvae of wax moths (Galleria mellonella L.) on growth performance, nutrient digestibility and blood profiles in growing piglets. A total of 27 crossbred piglets ((LWхL)хD), 39 days of age and 14.39±0.19 kg of body weight) were randomly divided into three groups (n=9 per group) based on gender and body weight. We substituted part of a fishmeal and a grain with 2.5% of dried larvae of darkling beetles (Zophobas morio L.) or with 3.0% of dried larvae of wax moths (Galleria mellonella L.). The replacement of fishmeal with insect biomass in the feeding regimen of the pigs did not change growth rate among groups and did not altered the digestibility of dry matter, crude protein and crude fiber (p ˃ 0.05). At the same time, the digestibility of the fat has increased in the experimental groups with dry larvae (p ≤ 0.05). Blood counts in all groups were within the physiological norm. As compared to control group, piglets of the experimental groups had an increase in bactericidal, lysozyme activity of the blood serum and phagocytic activity of neutrophils. Thus, supplementation of dry larvae of superworm or waxworm in the ration didn't affect negatively growth performance of experimental piglets while improving their parameters of non-specific immunity.

Comparison of Time Taken for Feeding Stable Preterm Babies Between Regular Nurse Feeding and Feeding with Feed Rail—A Randomized, Controlled Study

Objective To compare the variation of feeding rate and time taken for feeds between manual and automated feeding via feed rail. Methods Stable preterm babies weighing between 1 and 2 kg, on partial or full enteral feeds via gavage were randomized into gravity and feed rail feeding group, respectively. Ten nurses and 4 babies were paired to form 40 nurse-baby pairs for the study. Forty feeding events in each groups were recorded. Results The median duration of feeding in the feed rail group was 18.5 min compared to 15 min in nurse-led feeding (p = 0.34). Feeding rate corrected for bodyweight ranged between 0.8 and 2.3 mL/kg/min in the feed rail group compared to 2.5 and 8.9 mL/ kg/min in the control (manual gravity feed) group. This difference in the feed rate variation was statistically significant (p value of <0.0001). The median feed rate with feedrail was 1.3 mL/min as compared to 4.1 mL/min with manual gravity feeds. During the feed rail feeding, nurses were hands-free for 80% of the time. Conclusion Feed rail feeding results in slow, sustained, and minimal variation in gravity feeding at a rate of 1 to 2 mL/kg/min without affecting the feeding duration compared to manual nurse-led feeding.

Indicators of full value feeding rations for dairy cows / Indicadores de rações de valor total para vacas leiteiras

This article presents the results of the level of feeding and the health status of dairy cows in a commercial dairy farm on the content of the main components in milk (fat, protein, urea). The aim of the research was to study the milk productivity and composition of milk of cows, to analyze the level of feeding and the content of basic nutrients in the diet of the farm. The farm breeds purebred Holstein cattle with a high genetic potential for productivity. The milking herd was formed in 2009 on the basis of 600 heads of Holstein-Friesian heifers imported from Hungary, as well as 65 heads of Holsteinized heifers of Ukrainian selection from Ukraine in 2015. Today the livestock numbers about 1,500 head of cattle, of which there are about 900 breeders. On the territory of the farm there are: 3 cowsheds for keeping cows, an insemination room, a milking parlor with a parallel installation of the Delaval company, in which 48 cows are milked for one milking, the ABK, where the manager's office, livestock technician, accounting is located, and a mini-hotel with dining room and lounges. Dairy bases are equipped with auto-drinkers, ventilation, plumbing, electric lighting, manure removal mechanisms, and a milking installation. The object of the research was Holstein cows in the amount of 483 heads of Aina Dairy Farm LLP. The studies were carried out according to generally accepted zootechnical methods using modern equipment for conducting analyzes and interstate and state standards. The research results showed that the milk productivity of cows averaged 19.5 kg per day, the fat content 4.3%, the protein 3.9%, the number of somatic cells 230.5 thousand units / ml, urea 45.3 mg / 100 ml respectively. Analyzing the level of urea in milk can suggest a high crude protein content in the diet. The ration of feeding dairy cows on the farm is concentrate-silage-haylage and there is an excess of dry matter by 16.2%, crude protein by 9.8%, starch by 29.4%, respectively.

Este artigo apresenta os resultados do nível de alimentação e do estado de saúde de vacas leiteiras em uma fazenda comercial leiteira sobre o conteúdo dos principais componentes do leite (gordura, proteína, ureia). O objetivo da pesquisa foi estudar a produtividade e composição do leite de vacas, analisar o nível de alimentação e o teor de nutrientes básicos na dieta da fazenda. A fazenda produz gado holandês de raça pura com alto potencial genético de produtividade. O rebanho leiteiro foi formado em 2009 com base em 600 cabeças de novilhas Holstein-Friesian importadas da Hungria, bem como 65 cabeças de novilhas holsteinizadas da seleção ucraniana em 2015. Hoje o gado totaliza cerca de 1.500 cabeças de gado, das quais existem cerca de 900 criadores. No território da fazenda existem: 3 estábulos para criação de vacas, uma sala de inseminação, uma sala de ordenha com instalação paralela da empresa Delaval, na qual são ordenhadas 48 vacas para cada ordenha, a ABK, onde fica o escritório do gestor, pecuária técnica, a contabilidade está localizada, e um mini-hotel com refeitório e salões. As bases leiteiras são equipadas com bebedouros automáticos, ventilação, encanamento, iluminação elétrica, mecanismo de remoção de esterco e instalação de ordenha. O objeto da pesquisa foram vacas da raça holandesa no valor de 483 cabeças da Aina Dairy Farm LLP. Os estudos foram realizados de acordo com métodos zootécnicos geralmente aceitos, utilizando equipamentos modernos para a realização de análises e padrões interestaduais e estaduais. Os resultados da pesquisa mostraram que a produtividade do leite das vacas era em média 19,5 kg por dia, o teor de gordura 4,3%, a proteína 3,9%, o número de células somáticas 230,5 mil unidades / ml, ureia 45,3 mg / 100 ml respectivamente. A análise do nível de ureia no leite pode sugerir alto teor de proteína bruta na dieta. A ração para alimentação das vacas leiteiras na fazenda é concentrado-silagem-silagem-silagem e há excesso de matéria seca em 16,2%, proteína bruta em 9,8% e amido em 29,4%, respectivamente.

Copper sulfate and arginine supplements on performance, thyroid hormones and blood biochemistry of broilers fed with canola meal-based diets / Avaliação da suplementação com sulfato de cobre e arginina sobre o desempenho, hormônios tireoidianos e bioquímica sanguínea de frangos alimentados com dietas à base de canola

The present evaluated the effects of copper sulfate solution (CSS) and arginine powder (Arg) supplements on performance, thyroid hormones and blood biochemistry of broiler chickens fed with canola meal (CM)-based diets. The experimental design was completely randomized with a 3 × 3 factorial and 9 treatments, corresponding to 3 levels of CSS (0, 125 and 250 mg/kg) and 3 levels of Arg (0, 0.1 and 0.2%) (n = 45 per treatment). Feeds were offered ad libitum for 21 days, from 22 to 42 days of age. Feed efficiency was significantly affected by the dietary addition of 250 mg/kg CSS and 0.2% Arg, and by the CSS × Arg interaction. CM supplemented with CSS improved the thyroid gland status and increased the plasma levels of triiodothyronine and thyroxine. Birds fed diets supplemented with 0.2% Arg had lower blood glucose level than the other treatments. The addition of 250 mg/kg CSS and 0.2% Arg reduced the stress caused by the rapid growth of broilers, also increasing the overall bird welfare.

O objetivo do presente trabalho foi avaliar os efeitos da suplementação com solução de sulfato de cobre (SSC) e arginina em pó (Arg) sobre o desempenho, hormônios tireoidianos e bioquímica sanguínea de frangos de corte alimentados com dietas à base de canola DC. O desenho experimental foi completamente casualizado com fatorial 3 × 3 e nove tratamentos correspondentes a três níveis de inclusão de SSC (0, 125 e 250 mg/kg) e três níveis de Arg (0, 0,1 e 0,2%) (n = 45 para cada tratamento). As rações foram oferecidas ad libitum por 21 dias, de 22 até 42 dias de idade. A eficiência alimentar foi significativamente afetada pela adição de 250 mg/kg de SSC e 0,2% de Arg, assim como pela interação SSC × Arg. A suplementação da DC com SSC melhorou os parâmetros da glândula tireoide e aumentou os níveis plasmáticos de triiodotironina e tiroxina. As aves alimentadas com dietas suplementadas com 0,2% de Arg apresentaram menor nível de glicose sanguínea do que as dos demais tratamentos. A adição de 250 mg/kg de SSC e 0,2% de Arg reduz o estresse causado pelo rápido crescimento dos frangos, além de melhorar as condições gerais de bem estar das aves.