Effects of soybean lecithin supplementation on growth performance, serum metabolites, ruminal fermentation and microbial flora of beef steers

文献类型： 外文期刊

第一作者： Chen, G. J.

作者： Chen, G. J.;Zhang, R.;Wu, J. H.;Shang, Y. S.;Li, X. D.;Qiong, M.;Wang, P. C.;Li, S. G.;Xiong, X. Q.;Gao, Y. H.

作者机构：

关键词： Soybean lecithin; Microbial flora; Beef steers

期刊名称：LIVESTOCK SCIENCE （ 影响因子：1.943； 五年影响因子：2.252 ）

ISSN： 1871-1413

年卷期： 2020 年 240 卷

页码：

收录情况： SCI

摘要： This study was aimed to estimate the effect of soy lecithin (SL) on growth performance, serum metabolites, rumen fermentation and microbial flora in Simmental steers. Sixty Simmental steers were randomly assigned to four treatments: control (C), S1 (TMR with 10 g/kg (DM) SL), S2 (TMR with 20 g/kg (DM) SL) and S3 (TMR with 40 g/kg (DM) SL).The ADG of steers fed 10 g/kg, 20 g/kg and 40 g/kg SL was 8.6%, 22.5% and 9.4% higher than that control group, respectively (P <0.001), while FCR decreased quadratically (P <0.001) by increasing the SL level, and the lowest FCR was achieved for steers fed 20 g/kg SL. There was a linear decrease in the ruminal pH value yet a quadratic increase in acetate and total VFAs concentration by increasing the SL supplementation (P < 0.001). The serum concentrations of CHO, TG, HDL, FAS and HLS concentrations showed a linear increase by increasing the SL supplementation (P <0.05). The rumen bacterial community of five phyla (Bacteroidetes, Firmicutes, Proteobacteria, Spirochaetae and Actinobacteria) and genera (Prevotella, Bacteroidales BS11_gu4 Prevotellaceae UGG-033, Rikenellacese_RC and Coprostanoligenes) that were most abundant in the rumen microbial flora was not affected by SL supplementation (P >0.05), while some ruminal bacterial with lower abundance showed a linear decrease by increasing the SL supplementation. Therefore, SL supplementation improved growth performance and increased ruminal VFA yields of Simmental steers with no inhibitory effect on the dominant ruminal bacterial. Based on the results of growth performance, the recommended amount of SL supplement is 20 g/kg DM for beef steers.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序