Requirement of Digestible Sulfur Amino Acids in Laying Hens Fed Sorghum- and Soybean Meal-Based Diets
Rev. bras. ciênc. avic
; 18(2): 231-238, apr.-jun. 2016. tab, graf
Article
em En
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| ID: biblio-1490267
Biblioteca responsável:
BR68.1
Localização: BR68.1
ABSTRACT
Two experiments were done to evaluate the effect of increasing levels of dietary digestible methionine (Met) and Metcysteine (MetCys) ratio on the productivity of Hy-Line W-36 laying hens fed sorghum- and soybean meal-based diets. In Exp. 1, 160 hens from 68 to 75 weeks of age were assigned to four dietary levels of digestible Met (0.20 0.24, 0.28 and 0.32%). The digestible total sulfur amino acidsLysine (TSAALys) ratios were 62, 68, 76 and 84%. In Exp. 2, 192 hens from 76-83 weeks of age were assigned to four dietary digestible MetCys ratios (160, 116.7, 85.7 and 62.5%). The digestible TSAALys ratio was kept constant across diets (80%). Results were subjected to ANOVA and linear regression analyses. In Exp. 1, optimal egg production, egg mass, and feed efficiency responses were observed at 0.30 and 0.50% of dietary digestible Met and TSAA, respectively (quadratic effect, p 0.05). Live performance was maximized with digestible Met and TSAA in takes of 288 and 478 mg/hen/d, respectively. In Exp. 2, optimal egg production and feed efficiency responses were observed at 151 and 150% of dietary digestible MetCys ratios, respectively (quadratic effect, p 0.05). The digestible Met, Cys and TSAA intake to maximize egg production and feed efficiency were 313, 207 and 510 mg/hen/d, respectively. The requirements for sulfur AA in Hy-Line W-36 hens from 68 to 83 weeks of age fed sorghum- and soybean meal-based diets fell inside the range of the requirements previously estimated in hens fed corn-soybean meal based diets.
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Texto completo:
1
Base de dados:
VETINDEX
Assunto principal:
Galinhas
/
Ração Animal
Limite:
Animals
Idioma:
En
Revista:
R. bras. Ci. avíc.
/
Rev. bras. ciênc. avic
Ano de publicação:
2016
Tipo de documento:
Article