Artículos de revistas
Optimum Dietary Standardized Ileal Digestible Isoleucine to Lysine Ratio for Meat-Type Quails in the Growing-Finishing Phase
Fecha
2017-07-01Registro en:
Brazilian Journal Of Poultry Science. Campinas: Facta-fundacio Arnco Ciencia Tecnologia Avicolas, v. 19, n. 3, p. 417-420, 2017.
1516-635X
10.1590/1806-9061-2016-0355
S1516-635X2017000300417
WOS:000411819500008
S1516-635X2017000300417.pdf
Autor
Universidade Federal de Viçosa (UFV)
Inst Fed Sudeste Minas
Universidade Estadual Paulista (Unesp)
Institución
Resumen
This study was conducted to determine the optimum standardized ileal digestible isoleucine to lysine (SID Ile: Lys) ratio for meat-type quails from 15 to 35 d of age. Three hundred fifty not-sexed meattype quails (Coturnix coturnix coturnix) were randomly assigned into five treatments, with seven replicates of 10 quails each. An isoleucinedeficient corn-soybean meal-based diet was formulated and graded supplemented with L-isoleucine (99%) to obtain diets containing SID Ile: Lys ratios of 55,61, 67, 73, and 79%. Data were analyzed as oneway ANOVA and optimum SID Ile: Lys was estimated by polynomial (linear and quadratic) regression. Statistical differences were considered when p< 0.05. Quail performance from 15 and 21 d and 15 and 28 d of age was not affected by the treatments. From 15 to 35 d of age, body weight gain and body weight exhibited a quadratic response to increasing dietary SID Ile: Lys ratios, and were optimized at 66 and 67% SID Ile: Lys, respectively. Feed conversion ratio was not influenced by SID Ile: Lys ratios in any of the phases assessed herein. Based on the results, the optimum SID Ile: Lys ratio for meat-type quails from 15 to 35 d of age is 67%.