添加剂对扁蓿豆青贮饲料影响的研究  

Effects of additives on silage quality and in vitro digestibility of Ruthenia medic silage

作　　者：王莹[1] 玉柱[1] 于艳冬[2] 

机构地区：[1]中国农业大学草地研究所,北京100193 [2]南京农业大学动物科技学院,江苏南京210095

出　　处：《草业科学》2010年第2期129-133,共5页Pratacultural Science

基　　金：国家牧草产业技术体系;公益性行业科研专项项目"人工草地优质牧草生产技术研究与示范"(nyhyzx07-022);国家科技支撑计划项目"牧草丰产技术集成与产业化示范"(2006BAD16B08);"奶牛优质饲草生产技术研究及开发"项目(2006BAD04-06-06)

摘　　要：以结实期的扁蓿豆Medicago ruthenica为青贮原料,在实验室条件下采用单因素完全区组试验设计,调制扁蓿豆青贮饲料,研究商品菌制剂LaLsIL Dry(LD)和硫酸盐制剂Siloguard(SG)对扁蓿豆青贮饲料发酵品质和体外消失率的影响。结果表明:扁蓿豆直接青贮的丁酸含量较低,V-Score评分等级为良好;添加乳酸菌制剂未能改善扁蓿豆青贮饲料的发酵品质和提高其体外消失率;SG0.2%处理组的乳酸含量、粗蛋白含量和体外干物质消失率显著高于对照(P<0.05),氨态氮占总氮比例显著低于对照(P<0.05),说明SG0.2%处理可提高乳酸菌的发酵能力,降低了不良微生物对蛋白的降解,保存了大量可供动物体消化利用的营养成分;原料草的体外干物质和粗蛋白消失率显著高于青贮饲料(P<0.05)。To determine the effects of two commercial inoculums on ensiling characteristics and in vitro digestibility of Ruthenia medic silage, an experiment was conducted with three treatments and a CK and with three replicates using a randominized complete block design. The three treatments were LaL-sIL Dry（LD） 0. 001%, SG 0. l%）and SG 0.2%. The materials were fermented for 90 days and then the quality of silages was assayed. The results showed that content of butyric acid was low, and direct ensiled russian fenugreek was considered as excellent by the classification standard of V-score. No significant change in fermentation quality and digestibility in vitro was found in the treatment with LD. Lactic acid, crude protein and IVDMD of the treatment with SG 0.2% increased （P〈0.05）, but NH3 --N decreased （P〈0.05）. The results indicated that SG enhanced the ferment ability of lactic acid bacteria, and depressed other microbe to decompose crude protein. It seems that digestibility of dry matter and crude protein in vitro decreased after fermentation.

关 键 词：扁蓿豆 青贮 添加剂 发酵品质 体外消失率 

分 类 号：S816.53[农业科学—饲料科学]