乳酸菌添加剂对高寒牧区燕麦与箭筈豌豆混合青贮品质及酶活性的影响

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中图分类号：S816.5十3 文献标识码：A 文章编号：1007-0435（2025）08-2694-09

Abstract：This experiment was conducted to study the dynamic changes of the quality and enzyme activity of mixed silage of oats （Auena satiua）and vetch（Vicia satiua）after lactic acid bacteria addition in alpine pastures.In this experiment，a mixture of oats and vetch were silaged with two lactic acid bacteria additives [Lacto bacilus plantarum （CI），Lactobacillus plantarum （6H2）]，and quality and enzyme activity were determined at7，14，45and9Od of silage，using direct silage ascontrol（CK）.The results showed that pHand ammoniacal nitrogen content of the 6H2 and CI groups were significantly lower than thatof the CK groupat alsilage time points （ P<0.05 . At 45 and 9Od of silage， lactic and acetic acid contents of 6H2 group were significantly higher than those of CI and CK groups; pH values were significantly lower than those of CI and CK groups （ P <0.05） . Dry matter and crude protein contents were significantly higher （ .P<0.05 ） in the 6H2 and CI groups than in the CK group at allsilage time points.Acid protease activity was significantly higher in the 6H2 group than in the CI and CK groups at 45and 90d of silage ⋅P<0.05 ）．Accordingly，lactic acid bacteria 6H2 and CI improved the nutrient composition，fermentation quality and enzyme activity of mixed oat and vetch silage to a certain extent，and lactic acid bacteria 6H2 showed superior fermentation quality and nutrient optimisation in mixed oat and vetch silage，which is suitable for being used as silage additives in alpine pasture area.

Key words：Oats;Vetch;Mixed silage;Low-temperature-resistant lactic acid bacteria;Silage quality;Enzyme activity

近年来，天然草地超载过牧问题已严重影响草原生态修复与牧民增收。（剩余14066字）