不同植物对体外瘤胃发酵产气量和甲烷产量的影响OA北大核心CSTPCD

The purpose of the experiment was to study the effects of different plants on rumen total gas production(GP)and methane(CH4)production in vitro.In this experiment,the branches and leaves of 11 plants were used as materials for in vitro fermentation,and the yields of GP and CH4 were measured after 24 hours of fermentation in vitro.The results showed that the GP of Syringa oblata was the highest among the four shrubs and subshrubs.Among the perennial forages,the GP of Medicago sativa,Mcdicago falcata,Lotus corniculatus,and Glycine soja was significantly higher than that of Vicia sepium,Astragalus adsurgens,and Artemisia lavandulaefolia(P＜0.05).The CH4 yield of Syringa oblata and Artemisia frigida was lower than that of Lespedeza davurica and Thymus mongolicus.Syringa oblata and Vicia sepium could reduce CH4 yield and increase microbial protein(MCP)content.The contents of total saponins and alkaloids in Syringa oblata,Mcdicago falcata,and Vicia sepium were positively correlated with GP and negatively correlated with CH4.The study indicates that Syringa oblata,Vicia sepium and Mcdicago falcata can be used as high-quality feed additives to regulate rumen gas production characteristics of ruminants.