关键词: 甲烷, 温室气体, 反刍动物, 瘤胃, 甲烷减排

Abstract: Global warming has accelerated the melting of glaciers，increased the frequency and intensity of extreme weather，and damaged ecosystems. Greenhouse gases emitted by livestock play a crucial role in global warming. The sixth assessment report of the United Nations Intergovernmental Panel on climate change has pointed out that methane emission reduction is the fastest and necessary way to mitigate global climate change. Methane emissions from ruminants account for nearly one?third of anthropogenic methane emissions，and cause 3%?13% of dietary energy loss. Therefore，this paper will review the methane emission reduction measures of ruminants.

Key words: Methane, Greenhouse gases, Ruminants, Rumen, Methane emission reduction