Cinthia Eyng

Meal from tilapia filleting industrial waste in rations for broiler chickens.

Para avaliacao do desempenho de frangos de corte alimentados com diferentes niveis de inclusao de farinha de residuos da industria de filetagem de tilapias (0, 2, 4, 6 e 8%), foram utilizados 480 pintos de 1 dia, distribuidos em delineamento inteiramente casualizado, com cinco dietas experimentais, seis repeticoes e 16 aves por unidade experimental. Foram avaliados o ganho de peso, o peso final, o consumo medio de racao, a conversao alimentar e a mortalidade de 1 a 21 dias e de 1 a 42 dias de idade e, ao final do periodo experimental, foram mensurados os parâmetros sanguineos (calcio, fosforo e triglicerideos). Para avaliacao economica, foram calculados os custos das dietas experimentais, o indice de eficiencia economica e o indice de custo. Observou-se diferenca dos niveis de inclusao da farinha de tilapia sobre os parâmetros de consumo medio de racao, peso final e ganho medio de peso aos 21 dias de idade. No periodo total (1 a 42 dias), a inclusao de farinha de tilapia em niveis de ate 8% na dieta nao afetou o desempenho das aves. Apesar do aumento linear dos valores de triglicerideos, esse nivel de inclusao e farinha de tilapia reduz os valores de fosforo e calcio sanguineo e proporciona melhor desempenho economico.

Effect of dietary restriction and hay inclusion in the diet of slow-growing broilers

The objective of this study was to evaluate the effect of dietary restriction and inclusion of alfalfa (Medicago sativa L.) and Bermudagrass (Cynodon dactylon cv Coastal) hays in the diets of ISA Label JA57 slow-growing male broilers on performance, gastrointestinal tract characteristics, and economic viability. A total of 272 broilers at 21 days old were distributed in a randomized experimental design with four treatments, four replicates, and 17 birds per experimental unit. The treatments consisted of ad libitum concentrated feed (control intake), feed restriction (80% of the control intake), and feed restrictions with supplementation of alfalfa hay (80% of the control intake+20% alfalfa) or Bermudagrass hay (80% control intake+20% Bermuda). Dietary restriction, with and without hay inclusion, negatively affected (P<0.05) the weight gain of the birds; however, feed conversion was improved (P<0.05) for animals that underwent only restricted feeding, which also had the best economic indices. Birds subjected to dietary restriction and inclusion of hays showed changes (P<0.05) in the gastrointestinal organs and intestinal morphology.

Composição química, valores energéticos e aminoácidos digestíveis verdadeiros de farinhas de vísceras para aves

It was aimed to determine energetic and amino acidic composition, coefficients of metabolizity of energy and digestibility of viscera meal for poultry. The method of forced feeding with cecectomized adult cockerel was used. A completely randomized design was used, with 4 different viscera meals (3 of poultry, one from swine, and one in fast), six replications and one cecectomized cockerel per experimental unit. The apparent metabolizable energy values were the following: 2,878; 3,179; 3,005 and 2,145; the values of aparent metabolizable energy corrected for nitrogen balance were the following: 3,017; 3,487; 3,155; and 2,414 kcal/kg of natural matter, the values of aparent metabolizable energy corrected were: 3,720, 4,016, 3,840 and 2,981kcal/kg of natural matter and the values of aparent metabolizable energy corrected for nitrogen balance were 3,239, 3,367, 3,350 and 2,372 kcal/kg of natural matter. According to energetic values and gross energy, the apparent metabolizable coefficients were 53.65; 61.96; 60.20 and 46.13; for the correct apparent metabolizability they were 56.22; 67.96; 63.22 and 51.91; for the real metabolizity they were 69.33; 78.28; 76.94 and 64.1; and the values for corrected real metabolizability were 60.36; 65.62; 67.12 and 51.01, for poultry and swine viscera meal. The real digestibility average coefficients of essential and non essential amino acids for poultry and swine viscera meal are 81.20 and 74.55; 75.73 and 67.15; 88.45 and 85.20; 89.27 and 84.35, respectively.

Resíduo seco de destilaria com solúveis (DDGS) na alimentação de frangos de corte (22-42 dias)

Este trabalho teve por objetivo determinar a composicao bromatologica, energetica e a digestibilidade ileal de aminoacidos do residuo seco de destilaria com soluveis (DDGS), alem de avaliar o efeito da utilizacao desse residuo sobre o desempenho e rendimento de carcaca de frangos de corte dos 22 aos 42 dias de idade. No primeiro experimento, foram utilizadas 48 aves Cobb, machos, com 21 dias de idade e peso medio de 932 g ± 45 g, distribuidas em delineamento experimental inteiramente casualizado (DIC), com dois tratamentos, seis repeticoes e quatro aves por unidade experimental. No segundo (digestibilidade dos aminoacidos), foram utilizados 12 galos Leghorn cecectomizados, com peso medio de 1.912,1 ± 133,73 g, distribuidos em DIC, com um alimento teste (DDGS), seis repeticoes e um galo por unidade experimental. Finalmente, foi avaliado o desempenho e rendimento de carcaca de frangos de corte da linhagem Cobb Slow, dos 22 aos 42 dias, sendo utilizados 900 frangos, com peso inicial de 972,50 ± 25,79 g, distribuidos em DIC, em esquema fatorial 2 x 5, totalizando 10 tratamentos (macho e femea X 0; 5; 10; 15 e 20% de inclusao de DDGS), com cinco repeticoes por tratamento. Os valores de energia metabolizavel aparente (EMA) e EMA corrigida pelo balanco de nitrogenio (EMAn) foram de 2.461 e 2.282 kcal kg-1, respectivamente. Niveis de 5 a 20% de inclusao de DDGS nas racoes promovem queda no desempenho e no rendimento de carcaca de frangos de corte, machos e femeas, alem de maior deposicao de gordura abdominal nas femeas.

FARELO DE GIRASSOL E ENZIMAS EXÓGENAS EM RAÇÕES INICIAIS PARA FRANGOS DE CORTE

This research aimed to evaluate the effects of different levels of sunflower meal (SFM) and the supplementation of a multienzyme complex in the initial diets of broilers on their performance, intestinal morphometry and carcass characteristics. In all, 1100 1-d-old male chicks were distributed in a completely randomized design with 2 x 5 factorial arrangement (with and without a multienzyme supplement and five levels of SFM inclusion 0, 4, 8, 12 and 16%), and five replications per experimental unit. The experimental diets were provided until the chickens were 21-d-old and thereafter all birds received the same diet up to 42 d, to evaluate the possible residual effects of treatments. The SFM inclusion impaired performance from 1 to 21 d of age and the animals that received SFM during the initial phase, failed to recover from the negative effects on performance parameters. The multienzyme supplement improved the intestinal morphometry and was more effective than non-supplemented diets on performance, independent of the SFM inclusion level. The carcass and cuts yield of the wings and leg were significantly affected by the multienzyme supplementation. In conclusion, the SFM inclusion impaired performance variables and intestinal morphometry without affecting carcass yield; however, the supplementation of an enzyme complex counteracted the negative performance and intestinal morphometry effects.

Composição química e aminoacídica e coeficientes de digestibilidade verdadeira dos aminoácidos de farinhas de penas e sangue determinados em galos cecectomizados

Chemical and amino acid composition and true digestibility coefficients of amino acids of feather and blood meals for birds from different suppliers were determined. Thirty cecectomized cocks were distributed in a completely randomized design, with 4 different feather and blood meals (meals 1, 2, 3 and 4) and one treatment in which the birds remained fasting, with six replications as the experimental unit composed of one rooster. The variations in the chemical composition of the feather and blood meals can be related to the lack of standardization in the processing to which they are submitted. Mean true digestibility coefficients of essential and non essential amino acid for feather and blood meals 1,2, 3 and 4 are 75.14 and 68.41; 73.34 and 67.17; 78.99 and 75.41; 78.55 and 73.40%, respectively.