Research Progress of Plant Tannins Regulating Greenhouse Gas Emissions in Ruminants
In recent years,greenhouse gas emissions in livestock and poultry production have aroused wide-spread concern around the world.Rumen fermentation of ruminants produces a large amount of methane,and nitrous oxide(N2O)is produced in the process of excrement stacking,which aggravates the greenhouse effect.Therefore,the production and regulation of rumen methane and N2O have become a hot topic in scientific re-search.Plant tannins are water-soluble polyphenols with high molecular weight and widely exist in the plant kingdom.A large number of in vivo and in vitro experiments have shown that plant tannins can reduce methane production and nitrogen emission.The effect of tannin is affected by many factors,such as tannin content,structure,plant source,animal species,physiological state and diet,and there are still controversies on the effect of nutrient digestibility and animal performance.This paper introduced the generation and regulation of greenhouse gases in ruminants,reviewed the regulation of plant tannins on greenhouse gas emissions,and pro-vided a new idea for the application of plant tannins in ruminants.[Chinese Journal of Animal Nutrition,2024,36(3):1413-1425]
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