Effects of rumen-protected choline supplied at different dietary energy levels on growth performance and meat quality of fattening goats

文献类型： 外文期刊

第一作者： Tu, Y. L.

作者： Tu, Y. L.;Zhang, K.;Bai, Y. F.;Gao, L. P.;Tu, Y. L.;Zhang, K.;Bai, Y. F.;Gao, L. P.;Hong, W.

作者机构：

关键词： choline; energy level; goats; meat quality; supplementation; biochemical indices

期刊名称：JOURNAL OF ANIMAL AND FEED SCIENCES （ 影响因子：1.525； 五年影响因子：1.625 ）

ISSN： 1230-1388

年卷期： 2020 年 29 卷 3 期

页码：

收录情况： SCI

摘要： The effects of rumen-protected choline (RPC) supplementation in different energy level diets on growth performance and meat quality of fattening goats were examined in this study. In total, 40 six-month-old Cashmere goats (initial body weight 24.30 +/- 2.64 kg) were randomly assigned to four treatments: two different digestible energy (DE) levels (11.94 and 10.89 MJ/kg) and RPC supplement levels (0 and 0.2%). The experiment lasted for 70 days, with the first 10 days of acclimation and next 60 days of formal experimental period. It was shown that RPC supplementation in a low-energy diet improved the overall average daily feed intake, and the interaction effect of RPCxDE was highly significant between days 20 to 60 of the experiment. The overall average daily gain and feed to gain indices were not significantly affected by RPC supplementation at any energy level; however, RPC supplementation in a lowenergy diet tended to improve these indices. There were no significant effects of RPCxDE on slaughter performance, meat quality or serum biochemical indices; however, RPC supplementation resulted in lower drip loss, cook loss and shearing force, with a tendency to improve meat quality. Another positive effect of RPC supplementation was the enhancement of serum albumin and the reduction of serum urea nitrogen levels. So, it can be suggested that RPC has a greater effect on growth performance when supplemented in low-energy diets, and RPC addition can improve meat quality.

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