不同菌种对青贮玉米秸秆品质及肉牛瘤胃体外发酵特性影响的研究  

Effects of different strains on silage corn stalk quality and rumen fermentation characteristics of beef cattle in vitro

作　　者：谭舒心[1] 陈立波[1] TAN Shuxin;CHEN Libo(Jilin Vocational College of Industry and Tecnology,Jilin,Jilin Province 132013,China)

机构地区：[1]吉林工业职业技术学院,吉林吉林132013

出　　处：《中国饲料》2024年第22期17-20,共4页China Feed

摘　　要：文章旨在探究不同菌种对青贮玉米秸秆品质及肉牛瘤胃体外发酵特性的影响,设置5个处理,CK不加菌种,直接青贮发酵,T1、T2、T3和T4组分别添加枯草芽孢杆菌、布氏乳杆菌、拟康氏木霉菌和酵母菌,发酵60 d后对其进行感官评定、发酵指标测定和基础营养成分分析,并研究其对肉牛瘤胃体外发酵特性的影响。结果表明:拟康氏木霉菌、布氏乳杆菌和枯草芽孢杆菌的感官评定优于酵母菌。拟康氏木霉菌的pH最低,乳酸含量最高(P <0.05);布氏乳杆菌和拟康氏木霉菌的乙酸含量最高,氨态氮/总氮含量最低,且两组之间没有显著差异(P> 0.05)。与CK相比,不同菌种处理显著提高了干物质和可溶性碳水化合物的含量(P <0.05),显著降低了中性洗涤纤维含量(P <0.05),拟康氏木霉菌处理组的营养品质最佳。不同菌种处理后的产气量、氨态氮和总挥发性脂肪酸含量显著上升(P <0.05),其中拟康氏木霉菌处理组的增加幅度最大。综合考虑感官评定、发酵营养品质及体外瘤胃发酵参数变化,拟康氏木霉菌更适合用于青贮玉米秸秆发酵。In order to investigate the influences of different strains on quality of silage corn and rumen fermentation characteristics of beef cattle in vitro,five different treatments were set up.CK was directly fermented without adding strains,while T1,T2,T3 and T4 were added with Bacillus subtilis,Lactobacillus brucei,Trichodermoides and yeast,respectively.After 60 days of fermentation,sensory evaluation was performed.The effects of fermentation indexes,basic nutrients and rumen fermentation of beef cattle in vitro were studied.The results showed that Trichoderma pseudokongii,Lactobacillus brucei and Bacillus subtilis were superior than yeast in sensory evaluation.The pH of Trichoderma pseudokongensis group was the lowest and the lactic acid content was the highest(P<0.05).The acetic acid content of Lactobacillus brucei and Trichodermiformis was the highest,and the ammonia nitrogen/total nitrogen content was the lowes.The nutritional quality of Trichoderma pseudokongensis was the best.The gas production,ammonia nitrogen and total volatile fatty acid contents of different strains were significantly increased(P<0.05),and the increases in Trichoderma pseudokongensis were the largest.Trichoderma pseudocondii was more suitable for fermentation of silage corn stalk among Bacillus subtilis,Lactobacillus brucei,Trichoderma pseudocondii and yeast.

关 键 词：拟康氏木霉菌 玉米秸秆 青贮品质 营养品质 瘤胃体外发酵 

分 类 号：S823[农业科学—畜牧学]