Camelina sativaL. Oil Mitigates Entericin vitroMethane Production, Modulates Ruminal Fermentation, and Ruminal Bacterial Diversity in Buffaloes

文献类型： 外文期刊

第一作者： Ebeid, Hossam M.

作者： Ebeid, Hossam M.;Faiz-ul Hassan;Li, Mengwei;Peng, Lijuan;Peng, Kaiping;Liang, Xin;Yang, Chengjian;Ebeid, Hossam M.;Faiz-ul Hassan;Li, Mengwei;Peng, Lijuan;Peng, Kaiping;Liang, Xin;Yang, Chengjian;Ebeid, Hossam M.;Faiz-ul Hassan

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关键词： camelina oil; methane; rumen fermentation; methanogenesis; bacterial diversity

期刊名称：FRONTIERS IN VETERINARY SCIENCE （ 影响因子：3.412； 五年影响因子：3.588 ）

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年卷期： 2020 年 7 卷

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收录情况： SCI

摘要： This study was aimed to evaluate the effects ofCamelina sativaoil (CO) on fermentation kinetics and methane (CH4) production in rations with different roughage (R) to concentrate (C) ratios. Three total mixed rations (TMRs) were used as substrates (R70:C30, R50:C50, and R30:C70) supplemented with different levels of CO (0, 2, 4, 6, and 8% on dry matter basis) in anin vitrobatch culture system. The enteric CH(4)production was determined at different times of incubation while fermentation parameters were measured at the end of incubation. Results revealed that CO significantly decreased (P< 0.05) CH(4)production at 48 h in medium (R50:C50) and low- (R30:C70) roughage diets than control. Camelina oil at all levels significantly (P< 0.05) affected ammonia nitrogen (NH3-N) and microbial protein (MCP) in all rations. Propionate concentration was increased by supplementing 8% CO to R70:C30 TMR, but it decreased with increasing levels of CO for low- and medium-roughage diets. Acetate concentration was significantly (P< 0.05) higher at 4% CO supplementation, but it decreased with 8% CO level in R30:C70 TMR. For all rations, CO decreased (P< 0.001) total bacteria, protozoa, and methanogens. Total fungi counts were affected by CO in all rations, especially with a 6% level in two rations (R30:C70 and R50:C50) and 8% level with high-roughage ration (R70:C30). Supplementation of CO in medium-roughage ration (R50:C50) showed a linear (P< 0.05) decrease in bacterial richness and evenness indices along with Shannon diversity as compared to the control. Moreover, CO also increasedFirmicutestoBacteroidetesratio in all TMRs more effectively at higher levels. Camelina oil also affected the relative abundance ofPrevotellain both low- and medium-roughage diets while increasing the abundance ofRuminobacterandPseudobutyrivibrio. The present study concluded that CO enhanced fermentation kinetics while decreasing entericin vitroCH(4)production from fibrous diets. Thus, it may be considered as a potentially effective and environmentally friendly way of mitigating CH(4)emission from livestock.

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