Zinc, manganese, and copper amino acid complexes improve performance and bone characteristics of layer-type chicks under thermoneutral and cold stress conditions.

Two experiments were designed to evaluate the effect of mineral-amino acid complexes (AACM) as a partial replacement of inorganic mineral (IM) in layer-type chicks' diets. Both studies had the same dietary treatments, where in experiment 1 (Exp. 1) was conducted under thermoneutral conditions from 0 to 35 D and chicks in experiment 2 (Exp. 2) were exposed to cold stress conditions at nighttime during the first 15 D and to thermoneutral condition from 16 to 35 D. For each trial, 1,200 one-day-old Lohmann Brown chicks were used, with 20 cage replicates with 30 chicks per cage. Treatments consisted of the control diet (IM; with 70, 70, and 8 mg/kg of zinc [Zn], manganese [Mn], and copper [Cu], respectively) and the treatment diet (AACM, with 40, 40, and 2.75 mg/kg of Zn, Mn, and Cu, respectively, from IM sources, along with 30, 30, and 5.25 mg/kg of Zn, Mn, and Cu, respectively). Data were submitted to analysis of variance, and means were compared using the t-test (P < 0.05). In Exp. 1, there were no significant differences between treatments on chick performance. However, AACM-fed chicks had higher thymus (P = 0.03) and cecum weight (P < 0.01), superior micromineral deposition in the tibias (P < 0.01), and reduced phosphorus excretion (P = 0.03). In Exp. 2, chicks fed with AACM had higher body weight gain (P = 0.04), better average daily feed intake (P = 0.03), lower phosphorus excretion (P = 0.02), and higher liver and pancreas weight (P < 0.01) in the last week of the study. In conclusion, chicks fed with AACM under thermoneutral conditions had higher bone mineralization and reduced excretion of phosphorus, and in adverse conditions, AACM improves performance and liver and pancreas weight, also reducing phosphorus excretion.

Caracterização nutricional das folhas de Moringa oleifera (MOL) para frangos de corte / Chemical and nutritional characterization of moringa oleifera leaves for broilers

Objetivou-se determinar os valores energéticos e nutricionais das folhas de Moringa oleifera (MOL) para frangos de corte. Utilizaram-se 90 pintos machos, Cobb-500, com 14 dias de idade, distribuídos em delineamento inteiramente ao acaso, com cinco tratamentos e seis repetições de três aves. Os tratamentos consistiram de: uma dieta referência e quatro dietas com substituição de 10%, 20%, 30% e 40% da dieta referência pelas folhas de MOL. O período experimental teve duração de oito dias, utilizando-se a metodologia de coleta total de excretas. Foram determinados os valores de energia metabolizável aparente (EMA), aparente corrigida para o nitrogênio (EMAn), coeficiente de metabolizabilidade aparente da matéria seca (CMAMS), da proteína bruta (CMAPB) e da energia bruta (CMAEB). Os resultados obtidos foram submetidos à análise de variância e à análise de regressão a 5% de probabilidade. Houve efeito quadrático das variáveis à medida que a moringa era adicionada à ração referência. Na derivação das equações de regressão, o nível que proporcionou os melhores valores de EMA, EMAn e CMEB foi de 37,7% de substituição. O farelo de folhas MOL apresentou médias de 3140kcal/kg de EMA, 2845kcal/kg de EMAn, 76,92% de CMAEB, 76,63% de CMAMS e 73,42% de CMAPB.(AU)

This study aimed to determine the energy and nutritional value of the leaves of Moringa oleifera (MOL) for broilers. We used 90 male chicks, Cobb-500, with 14 days of age in a completely randomized design with five treatments and six repetitions of three birds. The treatments were: reference diet and 4 diets with substitution of 10%, 20%, 30%, and 40% of the diet by reference sheet MOL. The trial lasted eight days, using the method of total excreta collection. The apparent metabolizable energy (AME), apparent corrected for nitrogen (AMEn), apparent metabolizable coefficient of dry matter (AMCDM), crude protein (AMCCP) and gross energy (AMCGE). The results were submitted to analysis of variance and regression analysis at 5% probability. There was a quadratic effect of the variables as the moringa was added to the reference diet. In the derivation of the regression equations the level that provided the best values of AME, AMEn, AMCGE was 37.7% substitution. The leaves meal MOL presented average 3140kcal / kg of AME, 2845kcal / kg AMEn, 76.92% of AMCGE, 76.63% of AMCDM and 73.42% of AMCCP.(AU)

Metabolizabilidade da energia de farinhas mistas contendo silagem de peixes para frangos de corte / Energy metabolizability of mixed flour containing fish silage for broiler chicken

Objetivou-se com este trabalho determinar o valor nutricional e os valores de energia metabolizável aparente (EMA) e EMA corrigida para o balanço de nitrogênio (EMAn) de quatro farinhas mistas contendo silagem de resíduo de filetagem de tilápia para frangos de corte do tipo crescimento lento com 28 a 38 dias de idade. Analisou-se a composição físico-química das silagens e, em seguida, realizou-se um ensaio de metabolismo pelo método de coleta total de excretas com 180 pintos machos da linhagem Vermelho Pesadão Francês, distribuídos em um delineamento inteiramente ao acaso, com cinco tratamentos, seis repetições e seis aves por unidade experimental. Os tratamentos consistiram de uma ração referência (RR) e quatro dietas teste compostas de 70% da (RR), com a inclusão de 30% de farinha mista contendo silagem de peixes produzida com o farelo de algaroba (SFA), com a farinha de varredura de mandioca (SFVM), com o farelo de milho (SFM) e com a casca da mandioca (SCM). Os valores para composição físico-química das SFA, SFVM, SFM, SCM foram de 20,63, 20,76, 21,99 e 14,54% de proteína bruta; 17,04, 23,22, 21,97 e 20,27% de extrato etéreo; 7,53, 7,79, 8,65 e 8,83% de matéria mineral; 23,07, 10,55, 16,81 e 12,34% de fibra bruta; 1,79, 2,30, 1,57 e 2,72% de cálcio; 1,12, 1,72, 1,45 e 1,94% de fósforo; 532, 528, 598 e 508 densidade, g/L; 4,5, 4,0, 4,4 e 4,4 de pH. Quanto aos valores de EMA e EMAn das farinhas mistas contendo silagem de peixes em base de matéria seca, foram, respectivamente, 3560kcal/kg e 3402kcal/kg para a SFA, 3574kcal/kg e 3415kcal/kg para a SFVM, 3570kcal/kg e 3412kcal/kg para a SFVM e 3571kcal/kg e 3413kcal/kg para a SCM, com a SFA apresentando menor valor (P=0,01). Com base nos resultados, as silagens contendo restos de peixe podem ser utilizadas em dietas para frangos de corte.(AU)

The objective of this study was to determine the nutritional value and the values of Apparent Metabolizable Energy (AME) and AME corrected for nitrogen balance (AMEn) of four mixed meals containing fish silage for slow growth type broiler chickens at 28-38 days of age. The physicochemical composition of the silage was analyzed and then a metabolism trial was performed using total excreta collection method with 180 male chicks of Red French Pesadão lineage distributed in a completely randomized design with five treatments and six replicates of six birds per experimental unit. Treatments consisted of a basal diet (RR) and four test diets containing 70% (RR), with the inclusion of 30% of mixed flour containing fish silage produced with mesquite meal (SFA) with flour of cassava meal (SFVM), with corn meal (SFM), and dehydrated cassava peel (SCM). The values for physico-chemical composition of the SFA, SFVM, SFM, SCM, were 20,63, 20.76, 21.99, and 14.54% of crude protein; 17.04, 23.22, 21.97 and 20.27% of ethereal extract; 7.53, 7.79, 8.65, and 8.83% of mineral matter; 23,07, 10,55, 16,81, and 12,34% of crude fiber; 1.79, 2.30, 1.57, and 2.72% of calcium; 1.12, 1.72, 1.45, and 1.94% of phosphorus; 532, 528, 598, and 508 of density, g / L; 4.5, 4.0, 4.4, and 4.4 of pH. As for AME and AMEn of the flours containing fish silage on dry matter basis, values were of, respectively, 3560 kcal/kg and 3402 kcal/kg for the SFA, 3574 kcal/kg and 3415 kcal/kg for SFVM, 3570 kcal/kg and 3412 kcal/kg for SFVM, and 3571 kcal/kg and 3413 kcal/kg for SCM, with the SFA showing lowest value. Based on the results, silage containing fish waste can be used in diets for broilers.(AU)

Prediction of the metabolizable energy requirements of free-range laying hens.

This experiment was conducted with the aim of estimating the ME requirements of free-range laying hens for maintenance, weight gain, and egg production. These experiments were performed to develop an energy requirement prediction equation by using the comparative slaughter technique and the total excreta collection method. Regression equations were used to relate the energy intake, the energy retained in the body and eggs, and the heat production of the hens. These relationships were used to determine the daily ME requirement for maintenance, the efficiency energy utilization above the requirements for maintenance, and the NE requirement for maintenance. The requirement for weight gain was estimated from the energy content of the carcass, and the diet's efficiency energy utilization was determined from the weight gain, which was measured during weekly slaughter. The requirement for egg production was estimated by considering the energy content of the eggs and the efficiency of energy deposition in the eggs. The requirement and efficiency energy utilization for maintenance were 121.8 kcal ME/(kg∙d)and 0.68, respectively. Similarly, the NE requirement for maintenance was 82.4 kcal ME/(kg∙d), and the efficiency energy utilization above maintenance was 0.61. Because the carcass body weight and energy did not increase during the trial, the weight gain could not be estimated. The requirements for egg production requirement and efficiency energy utilization for egg production were 2.48 kcal/g and 0.61, respectively. The following energy prediction equation for free-range laying hens (without weight gain) was developed: ME /(hen ∙ d) = 121.8 × W + 2.48 × EM, in which W = body weight (kg) and EM = egg mass (g/[hen ∙ d]).

Energia metabolizável da levedura de cana-de-açúcar submetida a diferentes temperaturas e tempos de secagem para frangos de corte e poedeiras / Metabolizable energy of sugar cane yeast submitted to different temperatures and drying times for broilers and layers hens

Objetivou-se determinar a temperatura e o tempo de secagem por rolos rotativos, aos quais a, levedura de cana-de-açúcar é submetida que permitam seu melhor aproveitamento energético por galinhas poedeiras e frangos de corte. Para isso foram realizados três ensaios de metabolismo para determinar os valores de energia metabolizável aparente (EMA), aparente corrigida para nitrogênio (EMAn) e os coeficientes de metabolizabilidade aparente da matéria seca (CMMS) e da energia bruta (CMEB). O primeiro ensaio foi conduzido com galinhas poedeiras (E1), o segundo com frangos de corte (E2) em crescimento e o terceiro com frangos de corte em diferentes idades (E3)...

This study aimed to determine the temperature and drying time through rotative rolls, that sugar cane yeast is subjected to in order to allow best energy utilization by laying hens and broilers. Three metabolism trials were conducted to determine the values of apparent metabolizable energy (AME) and apparent corrected for nitrogen balance (AMEn), coefficient of apparent metabolizable dry matter (CAMDM) and gross energy (CAMGE). The first experiment was conducted with laying hens (E1), the second with broilers (E2) in growth and the third with broilers at different ages (E3)...

Determinação da energia metabolizável de alimentos para codornas japonesas em postura / Metabolizable energy of different feedstuffs tested in female Japanese quails

Foram determinados os valores de energia metabolizável aparente (EMA), de energia metabolizável aparente corrigida por retenção de nitrogênio (EMAn) e do coeficiente de metabolização aparente da energia bruta (CMAEB por cento) do milho, sorgo, farelo de soja, farelo de glúten de milho e óleo de soja refinado. Foram utilizadas 240 codornas japonesas (Coturnix japonica), fêmeas com idade inicial de 60 dias, em delineamento experimental inteiramente ao caso, com seis tratamentos, cinco repetições e oito codornas por unidade experimental. Os tratamentos consistiram de cinco rações experimentais e uma ração referência. Cada ração experimental foi constituída, na base da matéria natural, por 70 por cento da ração referência e 30 por cento do ingrediente a ser testado, com exceção da ração para determinação da EMAn do óleo de soja, com 10 por cento de inclusão e 90 por cento da ração referência. O experimento foi realizado em gaiolas distribuídas em baterias metálicas. Os valores de EMA, EMAn (em kcal/kg de matéria natural) e do CMAEB ( por cento) do milho moído, sorgo, farelo de soja, farelo de glúten de milho e óleo de soja refinado foram, respectivamente: 3.572 e 3.612kcal/kg e 92,6 por cento; 3.108 e 3.149kcal/kg e 80,9 por cento; 2.633 e 2.676kcal/kg e 65,3 por cento; 4.043 e 4.096kcal/kg e 75,0 por cento; 9.335 e 9.379kcal/kg e 98,8 por cento. Os valores de EMA descritos para outras espécies de aves são discrepantes dos obtidos no presente estudo, não sendo recomendado seu uso em formulação de rações para codornas japonesas em postura.

The values of the apparent metabolizable energy (AME), the apparent metabolizable energy corrected for nitrogen retention (AMEn), and the apparent metabolization coefficient of crude energy (AMCCE) were determined in corn, sorghum, soybean meal, corn gluten meal, and refined soybean oil. Two-hundred and forty six-day-old female Japanese quails (Coturnix japonica) were used in a completely randomized design, with five replicates and eight quails per experimental unit. The treatments consisted of six experimental diets and one reference diet. Each experimental diet was constituted, as fed basis, for 70 percent of the reference ration and 30 percent of food that would be tested, except the ration that contained refined soybean oil that was tested, as fed basis, with 10 percent of addition and 90 percent of the reference ration. The biological assay was carried out in wired floor cages distributed in iron batteries. The respective values of AME, AMEn (kcal/kg of natural matter basis), and AMCCE ( percent) of ground corn, sorghum, soybean meal, corn gluten meal, and refined soybean oil were respectively: 3,572, 3,612kcal/kg, and 92.6 percent; 3,108, 3,149kcal/kg, and 80.9 percent; 2,633, 2,676kcal/kg, and 65.3 percent; 4,043, 4,096kcal/kg, and 75.0 percent; and 9,335, 9,379kcal/kg, and 98.8 percent. The values of AME described for other birds species were different from those obtained in this study and are not recommended to be used in ration composition for Japanese quails.

Modelling energy utilisation in broiler breeder hens.

1. The objective of this study was to determine a metabolisable energy (ME) requirement model for broiler breeder hens. The influence of temperature on ME requirements for maintenance was determined in experiments conducted in three environmental rooms with temperatures kept constant at 13, 21 and 30 degrees C using a comparative slaughter technique. The energy requirements for weight gain were determined based upon body energy content and efficiency of energy utilisation for weight gain. The energy requirements for egg production were determined on the basis of egg energy content and efficiency of energy deposition in the eggs. 2. The following model was developed using these results: ME = kgW0.75(806.53-26.45T + 0.50T2) + 31.90G + 10.04EM, where kgW0.75 is body weight (kg) raised to the power 0.75, T is temperature ( degrees C), G is weight gain (g) and EM is egg mass (g). 3. A feeding trial was conducted using 400 Hubbard Hi-Yield broiler breeder hens and 40 Peterson males from 31 to 46 weeks of age in order to compare use of the model with a recommended feeding programme for this strain of bird. The application of the model in breeder hens provided good productive and reproductive performance and better results in feed and energy conversion than in hens fed according to strain recommendation. In conclusion, the model evaluated predicted an ME intake which matched breeder hens' requirements.