酶制剂和绿汁发酵液对巨菌草青贮品质的影响  

Effects of enzyme and fermented green juice on silage quality of Pennisetumsp.

作　　者：张诗[1] 林芝[1] 余豪闯 罗宗志[1] 庄益芬[1] 

机构地区：[1]福建农林大学动物科学学院,福建福州350002

出　　处：《草业科学》2017年第8期1755-1761,共7页Pratacultural Science

基　　金：国家菌草工程技术研究中心开放基金课题(JCJJ13017);福建省"大学生创新训练计划"项目(111zc3067)

摘　　要：为了大规模开发利用巨菌草(Pennisetum sp.),设置6个青贮处理,分别为无添加(对照)组、添加纤维素酶组、添加绿汁发酵液组、添加纤维素酶+绿汁发酵液(复合1)组、添加木聚糖酶组以及添加木聚糖酶+绿汁发酵液(复合2)组。室温条件下贮存60d后开封,对青贮品质进行分析测定。结果表明,与对照组相比,纤维素酶组的半纤维素含量降低、干物质回收率升高;木聚糖酶组的乳酸、乙酸、丙酸、可溶性碳水化合物含量降低;绿汁发酵液组的pH、气体损失率、氨态氮含量极显著降低(P<0.01),乳酸、干物质回收率和可溶性碳水化合物均增加;复合1组的乳酸和乙酸含量增加,pH、半纤维素、干物质回收率和氨态氮含量降低;复合2组的pH、干物质回收率、乙酸、丙酸、氨态氮含量降低,乳酸增加。较纤维素酶组和绿汁发酵液组,复合1组的青贮效果更优。较木聚糖酶组和绿汁发酵液组,复合2组的青贮效果更优。同时,证实巨菌草是适于作青贮原料。To develop Pennisetum sp. for large-scale use, Pennisetum sp. silage samples were assigned to six ex- perimental groups, control （CK）, fermented green juice group （FGJ）, cellulose group （CEL）, fermented green juice＋cellulase （Complex 1） group, xylanase （XYL） group, and fermented green juice＋xylanase （Com- plex 2） group. Each treatment was applied to 3 replicate samples. The samples were ensiled at room tempera- ture and opened 60 days later, after which their fermentation quality and chemical composition were analysed. The results showed that, compared with CK, the HC decreased and the DMR increased in CEL; the LA, AA, PA, and WSC of XYL decreased; the pH, GLR, and AN of FGJ decreased; the LA, DMR, and WSC of FGJ increased; the LA and PA of Complex 1 increased; the pH, GLR, AA, PA, and AN of Complex 2 decreased; and the LA of Complex 2 increased. Compared with FGJ1 and CEL, the silage quality of Complex 1 was better. Compared with FGJ2 and XYL, the silage quality of Complex 2 was better. Collectively, the results indicated that Pennisetum sp. is suitable for ensiling.

关 键 词：添加剂 巨菌草 乳酸菌 发酵 青贮品质 品质评定 

分 类 号：S816.53[农业科学—饲料科学]