Effects of Paper Mulberry Silage on the Growth Performance, Rumen Microbiota and Muscle Fatty Acid Composition in Hu Lambs
Yi Xiong | Chunze Guo | Lin Wang | Fei Chen | Xianwen Dong | Xiaomei Li | Kuikui Ni | Fuyu Yang
Paper mulberry (<i>Broussonetia papyrifera</i>) is widely ensiled to feed sheep in southwestern China, as unconventional woody forage. Feeding lambs with paper mulberry silage (PMS) may improve certain feeding characteristics, thereby affecting the growth performance and meat quality. The aim of this study is to investigate the effects of four diets of PMS on growth performance, rumen microbial composition, and muscle fatty acids profile in Hu lambs. The results showed that 30% and 40% PMS increased the dry matter intake and average daily gain of Hu lambs compared to the control group. PMS30 and PMS40 increased the content of C24:1, and PMS40 increased the content of C20:5n-3. The content of microbial protein (MCP) was higher in PMS40 than in others, but PMS30 and PMS40 reduced the total volatile fatty acid in rumen. PMS30 significantly increased the ratio of acetic acid to propionic acid. The abundance of ruminal <i>Christensenellaceae_R-7_group</i> and <i>norank_f_Eubacterium_coprostanoligenes_group</i> was significantly higher in PMS30 and PMS40 groups. Moreover, <i>Christensenellaceae_R-7_group</i> had a significant positive correlation with n3-polyunsaturated fatty acid. PMS40 might lead to a relatively high content of unsaturated fatty acids in <i>longissimus dorsi</i> muscle by increasing the relative abundance of <i>Christensenellaceae_R-7_group</i> in rumen.
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