Exigência de metionina + cistina para frangas de reposição na fase recria de 13 a 18 semanas de idade
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Data
2012
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Resumo
TThe methionine + cystine requirement was determined for pullets from 13 to 18 weeks of age and its
effect was verified on the laying phase. The experiment was divided into two experimental phases. In the
growing phase 560 birds (50% and 50% Lohmann LSL Lohmann Brown) at 13 to 18 weeks of age were
distributed in a completely randomized factorial scheme 5x2 (methionine + cystine levels and lineages),
with four replications and 14 birds per repetition. The levels of total methionine + cystine studied were
0.399, 0.469, 0.539, 0.609 and 0.679%. When they reached 22 weeks of age, 240 birds were used to
assess the residual effects of the diets offered in the growing phase on performance of poultry, egg
production and quality. Considering the production phase, there was no effect of the inclusion of
methionine + cystine levels in the diet for both strains. The total methionine and cysteine was 0.679%
(0.611% of digestible methionine + cystine) for light birds and 0.646% (0.581% methionine + cystine
digestible) for brown-egg pullets.
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Palavras-chave
Aminoácidos, Ovo, Maturidade sexual, Poedeiras, Postura, Amino acids, Egg, Hens, Production, Sexual maturity
Citação
D’ AGOSTINI, P. et al. Exigência de metionina + cistina para frangas de reposição na fase recria de 13 a 18 semanas de idade. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 64, n. 6, p. 1691-1698, 2012.