Metabolic dynamics of native lambs fed with Tifton 85 hay or Maniçoba hay associated with the spineless cactus / Dinâmica metabólica de cordeiros nativos alimentados com feno de capim-tifton 85 ou feno de maniçoba associados à palma forrageira

The objective of this study was to evaluate the metabolic response of native lambs fed Tifton 85 hay (Cynodon dactylon) or Maniçoba hay (Manihot pseudoglaziovii) associated with spineless cactus (Nopalea cochenillifera Salm Dyck). Sixteen Morada Nova lambs were used, with a mean initial weight of 19.36±1.48kg, distributed in a randomized block design, with two treatments and eight replications. Dry matter intake was higher for lambs fed Maniçoba hay compared to Tifton hay, while the body weight at slaughter was not influenced by diets. Regarding the blood metabolites, only the serum concentration of urea was influenced, with higher value observed in the lambs that fed the diet containing Tifton hay. When analyzing blood biomarkers, in the different biweekly collections, a linear increase in the blood concentration of urea, glucose, fructosamine, alkaline phosphatase and sodium was observed, as well as a quadratic effect for serum potassium. The other blood metabolites were not influenced in function of the collection days. The replacement of Tifton 85 hay for Maniçoba hay does not cause negative changes in the dynamics of different biomarkers and presents itself as a promising forage resource.(AU)

O objetivo deste trabalho foi avaliar a resposta metabólica de cordeiros nativos alimentados com feno de capim-tifton 85 (Cynodon dactylon) ou feno de maniçoba (Manihot pseudoglaziovii) associados à palma forrageira (Nopalea cochenillifera Salm Dyck). Foram utilizados 16 cordeiros Morada Nova, com peso inicial médio de 19,36±1,48kg, distribuídos em delineamento de blocos ao acaso, com dois tratamentos e oito repetições. O consumo de matéria seca foi maior nos cordeiros alimentados com feno de maniçoba em comparação ao feno de tifton, enquanto o peso corporal ao abate não foi influenciado pelas dietas. Em relação aos metabólitos sanguíneos, apenas a concentração sérica de ureia foi influenciada, com maior valor observado nos cordeiros que ingeriram a dieta contendo feno de capim-tifton. Quando foi realizada a análise dos biomarcadores sanguíneos nas diferentes coletas quinzenais, foi observado aumento linear nas concentrações sanguíneas de ureia, glicose, frutosamina, fosfatase alcalina e sódio, e efeito quadrático para o potássio sérico. Os demais metabólitos sanguíneos não foram influenciados em função dos dias de coleta. A substituição do feno de tifton 85 por feno de maniçoba influencia positivamente o metabolismo de cordeiros sem causar alterações na dinâmica dos diferentes biomarcadores e se apresenta como um promissor recurso forrageiro.(AU)

Metabolic dynamics of native lambs fed with Tifton 85 hay or Maniçoba hay associated with the spineless cactus / Dinâmica metabólica de cordeiros nativos alimentados com feno de capim-tifton 85 ou feno de maniçoba associados à palma forrageira

The objective of this study was to evaluate the metabolic response of native lambs fed Tifton 85 hay (Cynodon dactylon) or Maniçoba hay (Manihot pseudoglaziovii) associated with spineless cactus (Nopalea cochenillifera Salm Dyck). Sixteen Morada Nova lambs were used, with a mean initial weight of 19.36±1.48kg, distributed in a randomized block design, with two treatments and eight replications. Dry matter intake was higher for lambs fed Maniçoba hay compared to Tifton hay, while the body weight at slaughter was not influenced by diets. Regarding the blood metabolites, only the serum concentration of urea was influenced, with higher value observed in the lambs that fed the diet containing Tifton hay. When analyzing blood biomarkers, in the different biweekly collections, a linear increase in the blood concentration of urea, glucose, fructosamine, alkaline phosphatase and sodium was observed, as well as a quadratic effect for serum potassium. The other blood metabolites were not influenced in function of the collection days. The replacement of Tifton 85 hay for Maniçoba hay does not cause negative changes in the dynamics of different biomarkers and presents itself as a promising forage resource.(AU)

O objetivo deste trabalho foi avaliar a resposta metabólica de cordeiros nativos alimentados com feno de capim-tifton 85 (Cynodon dactylon) ou feno de maniçoba (Manihot pseudoglaziovii) associados à palma forrageira (Nopalea cochenillifera Salm Dyck). Foram utilizados 16 cordeiros Morada Nova, com peso inicial médio de 19,36±1,48kg, distribuídos em delineamento de blocos ao acaso, com dois tratamentos e oito repetições. O consumo de matéria seca foi maior nos cordeiros alimentados com feno de maniçoba em comparação ao feno de tifton, enquanto o peso corporal ao abate não foi influenciado pelas dietas. Em relação aos metabólitos sanguíneos, apenas a concentração sérica de ureia foi influenciada, com maior valor observado nos cordeiros que ingeriram a dieta contendo feno de capim-tifton. Quando foi realizada a análise dos biomarcadores sanguíneos nas diferentes coletas quinzenais, foi observado aumento linear nas concentrações sanguíneas de ureia, glicose, frutosamina, fosfatase alcalina e sódio, e efeito quadrático para o potássio sérico. Os demais metabólitos sanguíneos não foram influenciados em função dos dias de coleta. A substituição do feno de tifton 85 por feno de maniçoba influencia positivamente o metabolismo de cordeiros sem causar alterações na dinâmica dos diferentes biomarcadores e se apresenta como um promissor recurso forrageiro.(AU)

Coconut Cake in Diets for Quail in the Laying Phase

Currently, agro-industrial by-products have increasingly been used in animal feeding, as they constitute an alternative source of nutrients for the animal diet and a way to simultaneously reduce environmental pollution. The objective of this study was to examine increasing levels of inclusion of coconut cake in Japanese quail diets in the laying phase on their production performance and egg quality. A total of 360 Japanese quails were allotted to eight treatments with nine replicates and eight birds per experimental unit, in a randomized-block design. Five diets were formulated: a diet without inclusion of the by-product; and diets containing 3, 6, 9, and 12% coconut cake. The experiment lasted 63 days, with evaluations occurring at every 21 days. The following variables were analyzed: feed intake, laying rate, feed conversion, egg weight, specific gravity, Haugh unit, yolk, albumen and shell percentage, shell thickness, and shell weight. The treatments elicited a positive linear response from laying rate, whereas feed conversion per egg mass decreased linearly. In terms of egg-quality traits, shell percentage was influenced, increasing linearly. Coconut cake inclusion at 12% in the diet of Japanese quail in the laying improved feed conversion per egg mass and increased egg-laying rate and eggshell percentage.(AU)

Coconut Cake in Diets for Quail in the Laying Phase

Currently, agro-industrial by-products have increasingly been used in animal feeding, as they constitute an alternative source of nutrients for the animal diet and a way to simultaneously reduce environmental pollution. The objective of this study was to examine increasing levels of inclusion of coconut cake in Japanese quail diets in the laying phase on their production performance and egg quality. A total of 360 Japanese quails were allotted to eight treatments with nine replicates and eight birds per experimental unit, in a randomized-block design. Five diets were formulated: a diet without inclusion of the by-product; and diets containing 3, 6, 9, and 12% coconut cake. The experiment lasted 63 days, with evaluations occurring at every 21 days. The following variables were analyzed: feed intake, laying rate, feed conversion, egg weight, specific gravity, Haugh unit, yolk, albumen and shell percentage, shell thickness, and shell weight. The treatments elicited a positive linear response from laying rate, whereas feed conversion per egg mass decreased linearly. In terms of egg-quality traits, shell percentage was influenced, increasing linearly. Coconut cake inclusion at 12% in the diet of Japanese quail in the laying improved feed conversion per egg mass and increased egg-laying rate and eggshell percentage.

Economic viability of the use of different roughage sources in sheep feedlot diets / Viabilidade econômica do uso de fontes volumosas na dieta de ovinos confinados

The objective of this study was to evaluate the economic viability of feedlotting sheep fed diets containing different roughage sources. Twenty-one uncastrated male Santa Ines sheep were assigned to three treatments in a completely randomized design: corn silage (CS); forage palm combined with sugarcane bagasse (SB), and forage palm combined with Tifton 85 hay (TH). Economic viability and productive parameters of the animals were evaluated in each treatment. Animals of treatment TH had higher weight gain, better feed conversion, and lower productions costs (P<0.05). The worst performance and highest productions costs were observed for sheep fed CS (P<0.05). Sheep fed SB did not differ (P>0.05) in productive performance from the other treatments. The costs exceeded the revenue, resulting in negative profit for the diets tested. The high production costs of feedlot finishing using diets based on corn silage or palm combined with Tifton 85 hay or sugarcane bagasse make this activity unfeasible.(AU)

Objetivou-se avaliar a viabilidade econômica do confinamento de ovinos alimentados com dietas contendo diferentes fontes volumosas. Foram utilizados 21 ovinos machos Santa Inês, não castrados, distribuídos em três tratamentos: silagem de milho (SM); palma forrageira associada ao bagaço de cana-de-açúcar (BC); palma forrageira associada ao feno de Tifton 85 (FT) em delineamento inteiramente casualizado. Foi avaliada a viabilidade econômica e os parâmetros produtivos dos ovinos em cada dieta ofertada. Os ovinos do tratamento FT tiveram maior (P<0,05) ganho em peso, melhor conversão alimentar e menor custo de produção. Os ovinos alimentados com SM apresentaram o pior (P<0,05) desempenho e os maiores custos de produção. Os ovinos alimentados com BC não diferiram (P>0,05) quanto ao desempenho produtivo dos demais tratamentos. Os custos superaram a receita resultando em rentabilidade negativa para as dietas testadas. A terminação em confinamento, com dietas a base de silagem de milho, feno de Tifton 85 associada à palma ou bagaço de cana associada à palma, apresenta alto custo de produção e inviabiliza a atividade.(AU)

Economic viability of the use of different roughage sources in sheep feedlot diets / Viabilidade econômica do uso de fontes volumosas na dieta de ovinos confinados

The objective of this study was to evaluate the economic viability of feedlotting sheep fed diets containing different roughage sources. Twenty-one uncastrated male Santa Ines sheep were assigned to three treatments in a completely randomized design: corn silage (CS); forage palm combined with sugarcane bagasse (SB), and forage palm combined with Tifton 85 hay (TH). Economic viability and productive parameters of the animals were evaluated in each treatment. Animals of treatment TH had higher weight gain, better feed conversion, and lower productions costs (P0.05) in productive performance from the other treatments. The costs exceeded the revenue, resulting in negative profit for the diets tested. The high production costs of feedlot finishing using diets based on corn silage or palm combined with Tifton 85 hay or sugarcane bagasse make this activity unfeasible.

Objetivou-se avaliar a viabilidade econômica do confinamento de ovinos alimentados com dietas contendo diferentes fontes volumosas. Foram utilizados 21 ovinos machos Santa Inês, não castrados, distribuídos em três tratamentos: silagem de milho (SM); palma forrageira associada ao bagaço de cana-de-açúcar (BC); palma forrageira associada ao feno de Tifton 85 (FT) em delineamento inteiramente casualizado. Foi avaliada a viabilidade econômica e os parâmetros produtivos dos ovinos em cada dieta ofertada. Os ovinos do tratamento FT tiveram maior (P0,05) quanto ao desempenho produtivo dos demais tratamentos. Os custos superaram a receita resultando em rentabilidade negativa para as dietas testadas. A terminação em confinamento, com dietas a base de silagem de milho, feno de Tifton 85 associada à palma ou bagaço de cana associada à palma, apresenta alto custo de produção e inviabiliza a atividade.

Produção e qualidade do leite de cabras de torneiros leiteiros / Milk production quality in dairy goats that participate in dairy tournaments in the state of Rio Grande do Norte, Brazil

O objetivo deste trabalho foi avaliar a produção diária, a qualidade microbiológica e físico-químicas do leite das cabras participantes de Torneios Leiteiros no Estado do Rio Grande do Norte, Brasil. Foram analisadas 111 amostras de leite de 106 cabras (39 Saanen, 6 Toggenburg e 61 mestiças) agrupadas em categorias pela ordem de parto (primíparas e pluríparas) e estágio de lactação [inicial (0 a 30 dias), pico (30 a 45 dias) e pós-pico (mais de 45 dias)], utilizando o delineamento inteiramente casualisado. As cabras pluríparas apresentaram maiores médias de produção no início (4,41 kg/dia) e no pico (5,42 kg/dia) de lactação. Entre raças não houve diferença para produção media (4,62 kg/dia), ponto de congelamento (-0,488° C), pH (6,64), densidade (1,030 g/L), gordura (3,60%), proteína (2,90%), lactose (4,89%), extrato seco desengordurado (8,41%) e extrato seco total (12,06%). As análises microbiológicas revelaram a presença de mesófilos e coliformes fecais, sem diferença entre as ordens de parto ou entre raças. Cabras pluríparas apresentaram maiores produções de leite, mas não diferiram das primíparas quanto à composição, características físicas e microbiota do leite. As amostras de leite dos três genótipos (Saanen, Toggenburg e mestiças) analisados mostraram características físico-químicas, microbiológicas e de produção semelhantes.(AU)

The objective of this study was to evaluate the average daily production, the physicochemical components and microbiologicalagents in milk of primiparous and multiparous dairy goats that participate in dairy tournaments in the state of Rio Grande do Norte, Brazil. Analyses were carried out on 111 samples of goat milk from 106 goats (39 Saanen, 6 Toggenburg and 61 crossbred) grouped into categories by number of parity (primiparous and multiparous) and stage of lactation [initial (0 to 30 days), peak (30 to 45 days) and decrease (over 45 days)]. The data were analyzed in a completely randomizeddesign. The multiparous goats had higher average production at the beginning (4.41 kg/day) and peak (5.42 kg/day) of lactation. Between breeds there was no difference for average production(4.62 kg/day), freezing point (-0.488° C), pH (6.64), density (1.030 g/L), fat (3.60%), protein (2.90%) lactose (4.89%), dry extract (8.41%) or total solids (12.06%). Mesophiles (log CFU/mL) and fecal coliforms (log MPN/mL) were found in milk from goats, but no difference was observed between the orders of parity or between breeds. Multiparous goats had higher milk production, but did not differ from the primiparous goats regarding the composition, physical characteristics and microbiology of milk. The milk of 3 breeds (Saanen, Toggenburg and crossbred) presented similar physico-chemical, microbiological and production characteristics.(AU)

Produção e qualidade do leite de cabras de torneios leiteiros

The objective of this study was to evaluate the average daily production, the physicochemical components and microbiological agents in milk of primiparous and multiparous dairy goats that participate in dairy tournaments in the state of Rio Grande do Norte, Brazil. Analyses were carried out on 111 samples of goat milk from 106 goats (39 Saanen, 6 Toggenburg and 61 crossbred) grouped into categories by number of parity (primiparous and multiparous) and stage of lactation [initial (0 to 30 days), peak (30 to 45 days) and decrease (over 45 days)]. The data were analyzed in a completely randomized design. The multiparous goats had higher average production at the beginning (4.41 kg/day) and peak (5.42 kg/day) of lactation. Between breeds there was no difference for average production (4.62 kg/day), freezing point (-0.488º C), pH (6.64), density (1.030 g/L), fat (3.60%), protein (2.90%) lactose (4.89%), dry extract (8.41%) or total solids (12.06%). Mesophiles (log CFU/mL) and fecal coliforms (log MPN/mL) were found in milk from goats, but no difference was observed between the orders of parity or between breeds. Multiparous goats had higher milk production, but did not differ from the primiparous goats regarding the composition, physical characteristics and microbiology of milk. The milk of 3 breeds (Saanen, Toggenburg and crossbred) presented similar physico-chemical, microbiological and production characteristics.

O objetivo deste trabalho foi avaliar a produção diária, a qualidade microbiológica e físico-químicas do leite das cabras participantes de Torneios Leiteiros no Estado do Rio Grande do Norte, Brasil. Foram analisadas 111 amostras de leite de 106 cabras (39 Saanen, 6 Toggenburg e 61 mestiças) agrupadas em categorias pela ordem de parto (primíparas e pluríparas) e estágio de lactação [inicial (0 a 30 dias), pico (30 a 45 dias) e pós-pico (mais de 45 dias)], utilizando o delineamento inteiramente casualisado. As cabras pluríparas apresentaram maiores médias de produção no início (4,41 kg/dia) e no pico (5,42 kg/dia) de lactação. Entre raças não houve diferença para produção media (4,62 kg/dia), ponto de congelamento (-0,488º C), pH (6,64), densidade (1,030 g/L), gordura (3,60%), proteína (2,90%), lactose (4,89%), extrato seco desengordurado (8,41%) e extrato seco total (12,06%). As análises microbiológicas revelaram a presença de mesófilos e coliformes fecais, sem diferença entre as ordens de parto ou entre raças. Cabras pluríparas apresentaram maiores produções de leite, mas não diferiram das primíparas quanto à composição, características físicas e microbiota do leite. As amostras de leite dos três genótipos (Saanen, Toggenburg e mestiças) analisados mostraram características físico-químicas, microbiológicas e de produção semelhantes.

Produção e qualidade do leite de cabras de torneiros leiteiros / Milk production quality in dairy goats that participate in dairy tournaments in the state of Rio Grande do Norte, Brazil

O objetivo deste trabalho foi avaliar a produção diária, a qualidade microbiológica e físico-químicas do leite das cabras participantes de Torneios Leiteiros no Estado do Rio Grande do Norte, Brasil. Foram analisadas 111 amostras de leite de 106 cabras (39 Saanen, 6 Toggenburg e 61 mestiças) agrupadas em categorias pela ordem de parto (primíparas e pluríparas) e estágio de lactação [inicial (0 a 30 dias), pico (30 a 45 dias) e pós-pico (mais de 45 dias)], utilizando o delineamento inteiramente casualisado. As cabras pluríparas apresentaram maiores médias de produção no início (4,41 kg/dia) e no pico (5,42 kg/dia) de lactação. Entre raças não houve diferença para produção media (4,62 kg/dia), ponto de congelamento (-0,488° C), pH (6,64), densidade (1,030 g/L), gordura (3,60%), proteína (2,90%), lactose (4,89%), extrato seco desengordurado (8,41%) e extrato seco total (12,06%). As análises microbiológicas revelaram a presença de mesófilos e coliformes fecais, sem diferença entre as ordens de parto ou entre raças. Cabras pluríparas apresentaram maiores produções de leite, mas não diferiram das primíparas quanto à composição, características físicas e microbiota do leite. As amostras de leite dos três genótipos (Saanen, Toggenburg e mestiças) analisados mostraram características físico-químicas, microbiológicas e de produção semelhantes.

The objective of this study was to evaluate the average daily production, the physicochemical components and microbiologicalagents in milk of primiparous and multiparous dairy goats that participate in dairy tournaments in the state of Rio Grande do Norte, Brazil. Analyses were carried out on 111 samples of goat milk from 106 goats (39 Saanen, 6 Toggenburg and 61 crossbred) grouped into categories by number of parity (primiparous and multiparous) and stage of lactation [initial (0 to 30 days), peak (30 to 45 days) and decrease (over 45 days)]. The data were analyzed in a completely randomizeddesign. The multiparous goats had higher average production at the beginning (4.41 kg/day) and peak (5.42 kg/day) of lactation. Between breeds there was no difference for average production(4.62 kg/day), freezing point (-0.488° C), pH (6.64), density (1.030 g/L), fat (3.60%), protein (2.90%) lactose (4.89%), dry extract (8.41%) or total solids (12.06%). Mesophiles (log CFU/mL) and fecal coliforms (log MPN/mL) were found in milk from goats, but no difference was observed between the orders of parity or between breeds. Multiparous goats had higher milk production, but did not differ from the primiparous goats regarding the composition, physical characteristics and microbiology of milk. The milk of 3 breeds (Saanen, Toggenburg and crossbred) presented similar physico-chemical, microbiological and production characteristics.