Methionine requirements of male White Peking ducks from twenty-one to forty-nine days of age

文献类型： 外文期刊

第一作者： Xie, M

作者： Xie, M;Hou, SS;Huang, W

作者机构： Chinese Acad Agr Sci, Inst Anim Sci, Beijing 100094, Peoples R China

关键词： methionine;duck;requirement

期刊名称：POULTRY SCIENCE （ 2020影响因子：3.352； 五年影响因子：3.679 ）

ISSN： 0032-5791

年卷期： 2006 年 85 卷 4 期

页码：

收录情况： SCI

摘要： A dose-response experiment with 6 dietary methionine levels (0.20, 0.275, 0.35, 0.425, 0.50, and 0.575%) was conducted with male White Peking ducklings to estimate the methionine requirement of growing ducks from 21 to 49 d of age. One-day-old male White Peking ducklings were fed common starter diets from hatching to 21 d of age and then fed the experimental diets from 21 to 49 d of age. Three hundred thirty-six 21-d-old birds were allotted to 24 pens with 14 birds per pen according to similar pen weight. There were 6 dietary treatments, each containing 4 replicate pens. At 49 d of age, weight gain, feed intake, and feed/gain of ducks from each pen were measured, and 2 ducks selected randomly from each pen were slaughtered to evaluate the yields of abdominal fat, breast meat (including pectoralis major and pectoralis minor), and leg meat (including thigh and drum stick). Significant effects of dietary methionine on weight gain, breast meat, and abdominal fat were observed. Both weight gain and breast meat yield showed significant quadratic response to increasing dietary methionine, and abdominal fat decreased linearly (P < 0.05). According to the quadratic model, the optimal methionine requirement of male White Peking ducks from 21 to 49 d of age for maximum weight gain and breast meat yield were 0.377 and 0.379%, respectively.

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