含水量和乳酸菌添加剂对多花黑麦草青贮品质的影响  

Effects of moisture content and lactic acid bacteria additive on the quality of Italian ryegrass silage

作　　者：李君临[1] 张新全[1] 玉柱[2] 郭旭生[3] 孟祥坤 罗燕[1] 闫艳红[1] 

机构地区：[1]四川农业大学动物科技学院,四川雅安625014 [2]中国农业大学草地研究所,北京100193 [3]兰州大学草地农业生态系统国家重点实验室,甘肃兰州730020 [4]加拿大拉曼公司北京代表处,北京100000

出　　处：《草业学报》2014年第6期342-348,共7页Acta Prataculturae Sinica

基　　金：现代农业产业技术体系建设专项(CARS-35-05);春晖计划项目(Z2012033);公益性行业(农业)科研专项(201303061)资助

摘　　要：本试验旨在研究含水量和乳酸菌添加剂对多花黑麦草青贮品质的影响,探究优质多花黑麦草青贮饲料的调制方法。试验选用孕穗期的多花黑麦草为原料,原料含水量设85.23%(W1),74.70%(W2)和65.70%(W3)3个水平,乳酸菌添加浓度设置对照组0cfu/g鲜样(L0),105 cfu/g鲜样(L1),106 cfu/g鲜样(L2),107 cfu/g鲜样(L3)4个水平。桶装青贮42d后开盖,取样测定青贮饲料的青贮品质。结果表明,在高含水量(85.23%)的条件下,无论是否添加乳酸菌,丁酸的含量和氨态氮/总氮均未能达到优质青贮的条件,青贮失败;当含水量为74.70%时,添加乳酸菌组的青贮品质优于未添加组,且随着添加浓度的增加青贮品质更佳;在含水量为65.70%的条件下,无论是否添加乳酸菌添加剂,青贮饲料均能获得较好的青贮品质,但添加乳酸菌后效果更佳。因此,W3L3(含水量65.70%+107 cfu/g鲜样)处理的青贮效果最佳。The effects of moisture content and lactic acid bacteria additive on the quality of Italian ryegrass silage were investigated.Italian ryegrass（booting stage）was ensiled in plastic drums for 42 dwith application of lactic acid bacteria at 0,10^5,106 and 10^7 cfu/g fresh weight at three different moisture contents：85.23%,74.70% and 65.70%.Ensiling at 65.70% moisture produced good quality silage with or without addition of lactic acid bacteria but the highest quality silage resulted from the application of lactic acid bacteria.Silage quality was also good at 74.70% moisture but only with the addition of lactic acid bacteria;higher bacteria application rates improved silage quality.It is concluded that ensiling at 65.70% moisture with the addition of lactic acid bacteria（10^7 cfu/g fresh weight）produced the highest quality silage.

关 键 词：多花黑麦草 青贮品质 含水量 乳酸菌 

分 类 号：S816.53[农业科学—饲料科学]