数字农科院2.0

Low-protein diets and crystalline amino acids support growth performance and carcass traits of growing Sansui sheldrake ducks

文献类型： 外文期刊

作者： Yulong Feng;Meijuan Li;Lulin Tan;Yongbao Wu;Zhiguo Wen

作者机构：

关键词： carcass trait;growth performance;low-protein diet;Sansui sheldrake ducks

期刊名称： Journal of Applied Animal Research

ISSN： 0971-2119

年卷期： 2025 年 53 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： The study investigated the effects of reduced dietary crude protein (CP) on growth performance and carcass yield of Sansui sheldrake ducks. A dose-response experiment was conducted with 6 dietary CP levels (13.84, 14.43, 15.42, 16.33, 17.17, and 18.04%, analyzed), using crystalline amino acids to maintain a consistent amino acid profile. Male ducks were allotted to 6 experimental treatments with 7 replicate pens and 8 birds per pen, from 4 to 8 wk of age. Growth performance metrics, including weight gain, feed intake, feed conversion ratio (FCR), CP intake, and carcass traits, were evaluated at 8 weeks. Diet significantly affected (P < 0.05) among groups with CP levels between 14.43% and 18.04%. However, the lowest CP group (13.84% CP) had significantly lower weight gain and poorer FCR compared to the other groups. Additionally, abdominal fat yield of ducks fed a 13.84% CP diet was higher (P < 0.05) compared to all other groups (which did not differ). Regression analysis determined minimum CP requirements of 14.42% and 14.55% for optimal weight gain and FCR, respectively, from 4 to 8 weeks.

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