Rumen methanogens and mitigation of methane emission by anti-methanogenic compounds and substances

Amlan Patra; Tansol Park; Minseok Kim; Zhongtang Yu

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Rumen methanogens and mitigation of methane emission by anti-methanogenic compounds and substances

机译：瘤胃产甲烷菌和通过抗甲烷生成的化合物和物质减轻甲烷排放

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Methanogenic archaea reside primarily in the rumen and the lower segments of the intestines of ruminants,where they utilize the reducing equivalents derived from rumen fermentation to reduce carbon dioxide,formic acid,or methylamines to methane (CH4).Research on methanogens in the rumen has attracted great interest in the last decade because CH4 emission from ruminants contributes to global greenhouse gas emission and represents a loss of feed energy.Some DNA-based phylogenetic studies have depicted a diverse and dynamic community of methanogens in the rumen.In the past decade,researchers have focused on elucidating the underpinning that determines and affects the diversity,composition,structure,and dynamics of methanogen community of the rumen.Concurrently,many researchers have attempted to develop and evaluate interventions to mitigate enteric CH4 emission.Although much work has been done using plant secondary metabolites,other approaches such as using nitrate and 3-nitrooxy propanol have also yielded promising results.Most of these antimethanogenic compounds or substances often show inconsistent results among studies and also lead to adverse effects on feed intake and digestion and other aspects of rumen fermentation when fed at doses high enough to achieve effective mitigation.This review provides a brief overview of the rumen methanogens and then an appraisal of most of the antimethanogenic compounds and substances that have been evaluated both in vitro and in vivo.Knowledge gaps and future research needs are also discussed with a focus on methanogens and methane mitigation.

机译：产甲烷的古细菌主要存在于瘤胃和反刍动物肠道的下部，它们利用瘤胃发酵产生的还原当量将二氧化碳，甲酸或甲胺还原为甲烷（CH4）。在过去的十年中，反刍动物的CH4排放导致全球温室气体排放并代表着饲料能量的损失，引起了人们的极大兴趣。一些基于DNA的系统发育研究描绘了瘤胃中甲烷菌的多样性和动态社区。研究人员致力于阐明决定和影响瘤胃产甲烷菌群落多样性，组成，结构和动力学的基础。同时，许多研究人员已尝试开发和评估减轻肠CH4排放的干预措施。使用植物次生代谢物，其他方法，例如使用硝酸盐和3-硝基氧基丙醇这些产生致呕物的化合物或物质中的大多数往往在研究之间显示不一致的结果，并且当以足够高的剂量饲喂以达到有效缓解作用时，也会对饲料的摄入和消化以及瘤胃发酵的其他方面产生不利影响。简要概述瘤胃产甲烷菌，然后评估在体外和体内均已评估过的大多数产甲烷物质和物质。还讨论了知识差距和未来研究需求，重点是产甲烷菌和缓解甲烷。

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《畜牧与生物技术杂志(英文版)》 |2017年第2期|271-288|共18页
作者
Amlan Patra; Tansol Park; Minseok Kim; Zhongtang Yu;
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Department of Animal Sciences, The Ohio State University, 2029 Fyffe Road, Columbus, OH 43210, USA;

Department of Animal Nutrition, West Bengal University of Animal and Fishery Sciences, 37 K.B.Sarani, Belgachia, Kolkata 700037, India;

Department of Animal Sciences, The Ohio State University, 2029 Fyffe Road, Columbus, OH 43210, USA;

Animal Nutrition and Physiology Team, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Republic of Korea;

Department of Animal Sciences, The Ohio State University, 2029 Fyffe Road, Columbus, OH 43210, USA;

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Rumen methanogens and mitigation of methane emission by anti-methanogenic compounds and substances

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