精料中桑叶粉添加水平对育肥湖羊瘤胃发酵及纤维降解菌的影响

发布时间：2018-08-24 17:58

【摘要】：本试验旨在研究精料中不同添加水平的桑叶粉对育肥湖羊瘤胃发酵及纤维降解菌的影响。采用随机区组试验设计,将40只3月龄、体重(16.5±0.6)kg、健康状况良好的育肥公湖羊分为5组,每组8只羊,以全株玉米青贮作为粗饲料,分别饲喂含桑叶粉比例为0%(对照组)、15%(T15)、30%(T30)、45%(T45)、60%(T60)的不同精料,采取区组试验设计进行饲养试验,预试2周、正试8周。结果表明:与对照组相比,精料中添加适量比例的桑叶粉明显提高了总挥发性脂肪酸浓度;T15、T30组的乙酸浓度和乙酸/丙酸均高于对照组(P0.05);另外,该两组的乙酸、丁酸、异丁酸、异戊酸浓度皆高于T60组(P0.05)。除黄色瘤胃球菌以及T30组的产琥珀酸丝状杆菌外,替代桑叶粉后各组的纤维分解菌相对含量都高于对照组,并且T45组的溶纤维丁酸弧菌与嗜淀粉瘤胃杆菌相对数量高于其他各组(P0.05)。综上表明,精料中添加适量比例的桑叶粉能够促进湖羊瘤胃纤维类物质的发酵,并以45%比例的桑叶粉效果较好。
[Abstract]:The purpose of this study was to study the effects of mulberry leaf powder on rumen fermentation and cellulolytic bacteria in fattening Hu sheep. A randomized block design was used to divide 40 fattening male Hu sheep (3 months old and (16.5 卤0.6) kg, healthy) into 5 groups, 8 sheep in each group, and the whole plant corn silage was used as forage. Different concentrate containing 0% mulberry leaf powder (control group), 15% (T15), 30% (T30), 45% (T45) and 60% (T60) were fed respectively. The results showed that the concentration of acetic acid and acetic acid / propionic acid in the T15T30 group was significantly higher than that in the control group (P0.05), in addition, acetic acid, butyric acid, isobutyric acid, acetic acid, butyric acid and isobutyric acid were increased in both groups. The concentration of isovaleric acid was higher than that of T60 group (P0.05). The relative content of fibrinolytic bacteria in each group was higher than that in control group, except for Rhizoma xanthomonas and filamentous succinate in group T30, after replacing mulberry leaf powder, the relative content of fibronectin in each group was higher than that in control. The relative quantity of Vibrio fibrinolyticus and Mycobacterium amylophilus in T45 group was higher than that in other groups (P0.05). The results showed that the appropriate proportion of mulberry leaf powder in the concentrate could promote the fermentation of rumen fiber in Hu sheep, and the effect of 45% mulberry leaf powder was better.
【作者单位】：扬州大学动物科学与技术学院;中国农业科学院蚕业研究所;
【基金】：江苏省2016年苏北专项(富民强县:BN2016096)项目扬州大学大学生创新训练项目(x2015694、x2015693) 现代农业产业技术体系建设专项(CARS-22)
【分类号】：S826.5

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