Níveis nutricionais de metionina+cistina digestível para poedeiras leves no segundo ciclo de produção
Carregando...
Data
2011
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
It was conducted an experiment with the objective of setting the nutritional requirement of methionine+cystine
for white-egg laying hens in the second production cycle. It was used 180 white-egg laying hens from 79 to 95 weeks of
age submitted to a basal diet deficient in methionine+cystine, supplemented with 0.00; 0.053; 0.108; 0.161 or 0.214%
of DL-methionine (98%) to provide 0.490; 0.542; 0.594; 0.648 and 0.698% of digestible methionine+cystine in the rations.
Levels of supplementation followed ratios of methionine+cystine:lysine of 75, 83, 91, 99 and 107 with lysine fixed at 0.653%.
A complete randomized design with five levels of methionine + cystine was used, with six replicates and six birds per
experimental unit. Levels of methionine+cystine in the ration linearly affected feed conversion per dozen of eggs and mass
of eggs, laying rate, egg mass and albumen index and they quadratically affected weight of eggs and Haugh unity. Percentage
of components of the eggs was not affected by levels of methionine+cystine in the ration. Requirement of methionine+cystine
for white-egg laying hens is higher than 0.698%, which corresponds to a consumption of at least 796 mg/bird/day.
Descrição
Palavras-chave
Aminoácido, Produção de ovos, Qualidade de ovos, Amino acids, Egg production, Egg quality
Citação
SCHMIDT, Marlene et al. Níveis nutricionais de metionina+cistina digestível para poedeiras leves no segundo ciclo de produção. Revista Brasileira de Zootecnia, Viçosa, v. 40, n. 1, p. 142-147, 2011.