Li Shuai, Sun Yi, Guo Tongjun, Liu Wenyou, Tong Xiong, Zhang Zhifei, Sun Jiajie, Yang Yufeng, Yang Shuli, Li Dagang, Min Li
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
Guangdong Provincial Key Laboratory of Animal Nutrition Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
Animals (Basel). 2024 Jul 13;14(14):2057. doi: 10.3390/ani14142057.
Methane emissions from ruminants significantly contribute to greenhouse gases. This study explores the methane mitigation effect and mechanism of through in vitro rumen fermentation, aiming to establish its potential as a feed additive. We investigated the effects of freeze-dried and dried at supplementation levels of 2%, 5%, and 10% of dry matter on nutrient degradation, ruminal fermentation, methane inhibition, and microbial community structure in in vitro rumen fermentation. The freeze-dried at 2% supplementation significantly reduced CH emissions by 18.85% and enhanced crude protein degradability. However, total VFA and acetate concentrations were lower in both treatments compared to the control. The microbial shifts included a decrease in and and an increase in , , and , promoting propionate production. Additionally, a significant reduction in was observed, indicating direct methane mitigation. Freeze-dried at a 2% supplementation level shows potential as an effective methane mitigation strategy with minimal impact on rumen fermentation, supported by detailed insights into microbial community changes.
反刍动物的甲烷排放是温室气体的重要来源。本研究通过体外瘤胃发酵探究了[具体物质]的甲烷减排效果及机制，旨在确定其作为饲料添加剂的潜力。我们研究了在干物质添加水平为2%、5%和10%时，冻干和干燥的[具体物质]对体外瘤胃发酵中营养物质降解、瘤胃发酵、甲烷抑制和微生物群落结构的影响。添加2%冻干[具体物质]可显著降低甲烷排放18.85%，并提高粗蛋白降解率。然而，与对照组相比，两种处理下的总挥发性脂肪酸和乙酸盐浓度均较低。微生物变化包括[某些微生物]减少，[另一些微生物]增加，促进了丙酸盐的产生。此外，观察到[某种物质]显著减少，表明直接减少了甲烷排放。添加2%冻干[具体物质]显示出作为一种有效的甲烷减排策略的潜力，对瘤胃发酵影响最小，这得到了对微生物群落变化的详细洞察的支持。
