关键词: 纤维素降解菌, 纤维, 水稻秸秆, 温度, 青贮

Abstract: This study isolated a cellulose-degrading bacterium from the termite gut and investigated its fermentation effects on rice straw silage at different temperatures. The silage experiment included a control group (CK) and a cellulose-degrading bacterium treatment group (CS),with the addition of cellulose-degrading bacteria at a concentration of 1×10⁷ cfu·g^-1. Fermentation was conducted at room temperature (28℃) and high temperature (37℃) for 30 days,after which samples were taken for quality analysis. The findings indicated that compared to the control,the addition of the cellulose-degrading bacterium significantly increased the quantity and content of lactic acid bacteria,markedly reduced pH values (P<0.05) under normal temperature condition,and lowered ammonia nitrogen content (P>0.05) while significantly reducing pH values (P<0.05) under high-temperature condition. In both temperature conditions,the cellulose-degrading bacterium notably decreased the levels of neutral detergent fiber and acid detergent fiber content (P<0.05). In summary,the cellulose-degrading bacterium aided in cellulose degradation,promoted lactic acid fermentation,and improved the fermentation quality of rice straw silage. Particularly,the effectiveness of fiber degradation in rice straw silage feed was enhanced under 37℃ condition.

Key words: Cellulose-degrading bacteria, Fiber, Rice straw, Temperature, Silage