Optimum Digestible Valine to Lysine Ratio for Meat-Type Quails from 15 to 35 Days of Age
Alves, W. J; Viana, G. S; Barreto, S. L. T; Muniz, J. C. L; Hannas, M. I; Silva, A. D; Arnaut, P. R; Barros, V. R. M. S.
R. bras. Ci. avíc.;
19(2): 185-190, abr.-jun. 2017. tab
Artigo
em Inglês
| VETINDEX
| ID: vti-16979
Resumo
This study was conducted to estimate the dig. valine to lysine (Val:Lys) ideal ratio for meat-type quails from 15 to 35 d of age. A total of 385, 15-day-old not sexed quails, were randomly assigned to five treatments, each one seven times replicated with eleven quails per experimental unit. Experimental treatments consisted of five dig. Val:Lys ratios (0.65; 0.70; 0.75; 0.80 and 0.85). Ideal dig. Val:Lys ratio was estimated using polynomial regression and linear broken-line regression model. Significant effect was considered when p0.05. Feed conversion ratio was not affected by dig. Val:Lys ratios in any of the assessed phases. From 15 to 21 d of age Val:Lys ratios increased linearly feed intake, weight gain and body weight. From 15 to 28 d of age, weight gain and body weight were both optimized by the Val:Lys ratio of 0.77. A linear effect of dig. Val:Lys ratios was observed on weight gain and final body weight from 15 to 35 d of age. From 15 to 35 d of age, according to linear broken-line regression model, the dig. Val:Lys ideal ratios for optimum final body weight and weight gain were 0.77 and 0.76, respectively. Based on the results the estimated dig. Val:Lys ratio for optimum meat-type quail performance from 15 to 35 d of age is 0.77(AU)
Biblioteca responsável:
BR68.1
Localização: BR68.1
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