Response of growing goslings to dietary methionine from 28 to 70 days of age
文献类型: 外文期刊
第一作者: Wang, Z. Y.
作者: Wang, Z. Y.;Zhou, Q. Y.;Yang, H. M.;Shi, S. R.;Zou, J. M.;Zhang, K. N.;Han, H. M.
作者机构:
期刊名称:BRITISH POULTRY SCIENCE ( 影响因子:2.095; 五年影响因子:2.266 )
ISSN: 0007-1668
年卷期: 2010 年 51 卷 1 期
页码:
收录情况: SCI
摘要: 1. A dose-response experiment with 5 dietary methionine concentrations (23, 33, 43, 53 and 63 g/kg) was conducted with goslings to estimate the growth performance and carcase quality response of growing goslings to dietary methionine from 28 to 70 d of age. 2. A total of 150, 28-d-old birds were randomly distributed to 15 pens with 10 birds per pen according to similar pen weight. There were 5 dietary treatments, each containing three replicate pens. Weight gain, feed intake and feed/gain of goslings from each pen were measured at 2-week intervals from 28 to 70 d of age. At 70 d of age, 4 goslings were selected randomly from each pen and slaughtered to evaluate carcase quality. 3. Significant effects of dietary methionine on daily weight gain (28-56 d) and daily feed intake were determined. Daily weight gain from 28 to 42 d and 28 to 56 d, daily feed intake and gain/feed showed significant quadratic response to increasing dietary methionine, while abdominal fat proportion showed a significant linear response. 4. When dietary CP concentration was 1582 g/kg, the optimal methionine concentrations for growing goslings from 28 to 42 d and 28 to 56 d of age for maximum daily weight gain were 407 and 4.14 g/kg, respectively.
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