添加剂对西藏青饲玉米和青稞秸秆混合青贮发酵品质的影响  

Effects of Additives on the Fermentation Quality of Mixed Silage of Forage Maize and Hullessbarley Straw in Tibet

作　　者：李龙兴[1,2] 郭刚[1,3] 原现军[1] 闻爱友[1] 王坚[1] 参木有[4] 陈裕祥[4] 邵涛[1] 

机构地区：[1]南京农业大学动物科学技术学院饲草调制加工与贮藏研究所,江苏南京210095 [2]贵州省草地技术试验推广站,贵州贵阳550025 [3]山西农业大学动物科学技术学院,山西太谷0308012 [4]西藏自治区农牧科学院畜牧兽医科学研究所,西藏拉萨850003

出　　处：《草地学报》2015年第2期401-406,共6页Acta Agrestia Sinica

基　　金：公益性行业(农业)科研专项经费项目"牧区优质高效饲草生产利用技术研究与示范";"十二五"国家科技支撑计划"藏北退化草地综合整治技术与示范"(2011BAC09B03);中国科学院西藏区域创新平台建设项目"促进农牧民增收的西藏农牧结合技术体系构建与示范"资助

摘　　要：为探讨酶和乳酸菌制剂对西藏地区青稞(Hordeum vulgare)秸秆与青饲玉米(Zea mays)混合青贮(35%:65%)发酵品质的影响,试验分别设对照组(C)、酶制剂(E)、乳酸菌制剂(LAB)和酶+乳酸菌制剂(E+LAB)4个处理组。青贮后第15,30和45 d开窖取样,测定青贮饲料发酵品质。结果表明:添加酶或乳酸菌制剂在一定程度上改善了青贮饲料的发酵品质,与对照组相比,添加剂处理组青贮饲料的pH和氨态氮/总氮值降低,乳酸和水溶性碳水化合物含量提高;对照组和E处理组中乙酸含量和总挥发性脂肪酸含量显著高于LAB和E+LAB处理组,而酶和乳酸菌组合添加进一步提高乳酸和水溶性碳水化合物含量,表明酶和乳酸菌组合添加比二者单独添加效果更显著。The effects of adding cornzyme and lactic acid bacteria on the fermentation quality of mixed ensi- lage of hulless barley （Hordeurn vulgate） straw and forage maize（Zea rnays）during ensiling were studied here. The treatments were as follows, control ; cornzyme （E） lactic acid bacteria（LAB） cornzyme and lactic acid bacteria（E＋LAB）. The silos were opened on 15, 30 and 45th days after ensiling and the fer- mentation quality was analyzed. The results showed that the addition of cornzyme or lactic acid bacteria could improve the fermentation quality of mixed silage. The pH values and ammonia nitrogen/total nitro- gen ratios of adding treatments were lower than that of control, while the contents of lactic acid and water soluble carbohydrates were higher than that of control. The acetic acid and total VFA contents of control and E were significantly higher than that of LAB and E＋LAB （P〈0.05）, while the addition of cornzyme and lactic acid bacteria could increase the contents of lactic acid and water soluble carbohydrates indicating that the effect of adding E＋LAB was more significant than that of adding E or LAB alone.

关 键 词：青稞秸秆 青饲玉米 混合青贮 添加剂 发酵品质 

分 类 号：S816.53[农业科学—饲料科学]