期刊
BRITISH POULTRY SCIENCE
卷 54, 期 4, 页码 486-493出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00071668.2013.794257
关键词
-
资金
- National Council of Technological and Scientific Development (CNPq), Brazil
1. The objective of this study was to determine the optimum glycine+serine (Gly+Ser) concentration in low-crude protein (CP) diets that have adequate or high concentrations of dietary threonine (Thr) for broiler chickens in the initial growth phase. 2. Treatments consisted of four concentrations of dietary Gly+Ser (18.4; 19.8; 21.2 and 22.6g/kg) and two concentrations of dietary Thr (9.3 and 10.7g/kg, corresponding to 100 and 115% of the required Thr, respectively). 3. At 21d, interactions were observed between dietary Gly+Ser and Thr concentrations for the feed conversion ratio, creatine content in the pectoral muscles and serum concentrations of uric acid. There was a quadratic effect of the concentrations of Gly+Ser in the diets with 9.3g Thr/kg on the feed conversion ratio and creatine content in the pectoral muscles, with an optimisation concentration of 20.8 and 21.1g Gly+Ser/kg, respectively. 4. Diets containing 10.7g Thr/kg negatively affected the feed conversion ratio, relative breast weight, creatine content in the pectoral muscles, serum concentrations of uric acid and ammonia in poultry compared to diets containing 9.3g Thr/kg. 5. The need for Gly+Ser in diets with low-protein concentration (190g CP/kg) and adequate concentration of Thr (9.3g/kg) is 20.8g/kg for broilers in the 1- to 21-d phase.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据