瘤胃
产甲烷菌
微生物群
丙酸盐
生物
食品科学
产甲烷
干物质
动物科学
细菌
生物化学
发酵
遗传学
生物信息学
作者
Koki Maeda,Van Thu Nguyen,Tomoyuki Suzuki,Keita Yamada,Kushi Kudo,Chie Hikita,Van Phong Le,Minh Chon Nguyen,Naohiro Yoshida
标识
DOI:10.1111/1751-7915.13702
摘要
The effects of cashew nut shell liquid (CNSL) feeding on the methane (CH4 ) emission and the ruminal microbiome of Lai Sind beef cattle were investigated. Changes in the methane production and rumen microbiome by CNSL feeding were monitored by a respiration chamber and 16S rRNA gene amplicon sequencing respectively. The results demonstrated that CNSL feeding mitigated 20.2%-23.4% of the CH4 emission in vivo without apparent adverse effects on feed intake and feed digestibility. The rumen fluid analysis revealed a significant increase in the proportion of propionate in the total short-chain fatty acids. The relative abundance of methanogen (order Methanobacteriales) decreased significantly, indicating the direct inhibitory effect of CNSL on methanogens. The predicted function of the rumen microbiome indicated that carbohydrate and lipid metabolisms including propionate production were upregulated by CNSL feeding, whereas CH4 metabolism was downregulated. A network analysis revealed that methanogen changed its partner bacteria after CNSL feeding. The δ13 C of CH4 ranged from -74.2‰ to -66.6‰ with significant fluctuation by CNSL feeding, in agreement with the shift of the rumen microbiome. Our findings demonstrate that CNSL feeding can mitigate the CH4 emission from local cattle production systems in South-East Asia by modifying the rumen microbiome and its function.
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