Sargassum mcclurei Mitigating Methane Emissions and Affecting Rumen Microbial Community in In Vitro Rumen Fermentation
文献类型： 外文期刊
作者： Li, Shuai 1 ; Sun, Yi 1 ; Guo, Tongjun 4 ; Liu, Wenyou 1 ; Tong, Xiong 1 ; Zhang, Zhifei 1 ; Sun, Jiajie 2 ; Yang, Yufeng 3 ; Yang, Shuli 5 ; Li, Dagang 1 ; Min, Li 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Minist Agr,Key Lab Anim Nutr & Feed Sci South Chin, Guangzhou 510640, Peoples R China
2.South China Agr Univ, Coll Anim Sci, Guangdong Prov Key Lab Anim Nutr & Regulat, Guangzhou 510642, Peoples R China
3.Jinan Univ, Inst Hydrobiol, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Guangzhou 510632, Peoples R China
4.Xinjiang Acad Anim Sci, Feed Res Inst, Key Lab Xinjiang Feed Biotechnol, Urumqi 830011, Peoples R China
5.Foshan Univ, Coll Life Sci & Engn, Foshan 528231, Peoples R China
关键词： rumen fermentation; seaweed; methane emissions; rumen microbiota
期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.0 ）
ISSN： 2076-2615
年卷期： 2024 年 14 卷 14 期
页码：
收录情况： SCI
摘要： Methane emissions from ruminants significantly contribute to greenhouse gases. This study explores the methane mitigation effect and mechanism of S. mcclurei through in vitro rumen fermentation, aiming to establish its potential as a feed additive. We investigated the effects of freeze-dried and dried S. mcclurei 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 S. mcclurei at 2% supplementation significantly reduced CH4 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 Lachnospiraceae_NK3A20_group and Ruminococcus and an increase in Selenomonas, Succinivibrio, and Saccharofermentans, promoting propionate production. Additionally, a significant reduction in Methanomicrobium was observed, indicating direct methane mitigation. Freeze-dried S. mcclurei 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.
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