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Effects of Microbial Fermentation Corn Straw on Rumen Fermentation and Microbial Diversity of Dorset×Thin-Tailed Han Weaned Lambs

  • GUO Yunxia ,
  • HAO Qinghong ,
  • LIU Yueqin ,
  • ZHANG Yingjie ,
  • REN Shuyue
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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
    2. College of Life Science, Hebei Agricultural University, Baoding 071001, China

Received date: 2016-07-21

  Online published: 2017-01-16

Abstract

This study was to evaluate the effects of microbial fermented corn straw on microbial diversity of Dorset×thin-tailed Han weaned lambs, and to provide theoretical basis for studies on the microbial fermented corn straw promoting the digestion and absorption of nutrients. Eighty Dorset×thin-tailed Han weaned lambs with the average body weight of (24.62±3.59) kg were randomly assigned to 5 groups and each group had 16 lambs, in which 0 (control), 25%, 50%, 75% and 100% silage corn straw were substituted by microbial fermented corn straw, respectively. Preliminary trial period was 15 days and formal experimental period was 60 days. The results showed as follows:after feeding 4 h, except the 25% addition group decreased a little (P>0.05), the pH of ruminal fluid in 50%, 75% and 100% addition groups increased by 1.39% (P>0.05), 4.16% (P<0.05) and 7.45% (P<0.01) compared with the control group, respectively; with the microbial fermented corn straw addition increasing, the total volatile fatty acid (VFA) content in ruminal fluid was firstly increased and then down, which in 25%, 50% and 75% addition groups increased by 0.93% (P>0.05), 4.18% (P>0.05) and 5.19% (P<0.05) compared with the control group, respectively, but it showed no significant difference between in control group and 100% addition group (P>0.05); the acetate/propionate in ruminal fluid in addition groups was lower than that in control group, and that in 25%, 50%, 75% and 100% groups decreased by 12.44% (P<0.05), 4.93% (P>0.05), 12.21% (P<0.05) and 9.86% (P<0.05) compared with the control group, respectively. By the analysis results of denaturing gradient gel electrophoresis (DGGE), using microbial fermented corn straw to substitute appropriate silage corn straw could improve the proliferation of fiber degradation bacterium and inhibit the proliferation of protein degradation bacterium in ruminal fluid. In conclusion, using microbial fermented corn straw to substitute 75% silage corn straw in TMR is optimum to improve the level of ruminal fermentation of Dorset×thin-tailed Han weaned lambs.

Cite this article

GUO Yunxia , HAO Qinghong , LIU Yueqin , ZHANG Yingjie , REN Shuyue . Effects of Microbial Fermentation Corn Straw on Rumen Fermentation and Microbial Diversity of Dorset×Thin-Tailed Han Weaned Lambs[J]. Chinese Journal of Animal Nutrition, 2017 , 29(1) : 239 -248 . DOI: 10.3969/j.issn.1006-267x.2017.01.027

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