| Autor: |
WJ Alves, GS Viana, SLT Barreto, JCL Muniz, MI Hannas, AD Silva, PR Arnaut, VRMS Barros |
| Jazyk: |
angličtina |
| Předmět: |
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| Zdroj: |
Brazilian Journal of Poultry Science, Vol 19, Iss 2, Pp 185-190 |
| Druh dokumentu: |
article |
| ISSN: |
1806-9061 |
| DOI: |
10.1590/1806-9061-2016-0276 |
| Popis: |
ABSTRACT 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 p≤0.05. 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 |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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