摘要
为探讨甲酸对鹅观草（RoegneriakamojiOhwi）青贮品质的影响，向鹅观草中添加不同浓度的甲酸（2．5g／kg、5．0g／kg和7．5g／kg），分析青贮料的发酵品质和化学成分。结果表明：添加甲酸可使鹅观草青贮料的pH值和氨态氮占总氮含量显著下降（P〈0．05），添加量达到7．5g／kg时，青贮料的pH值和氨态氮占总氮含量最低；同时，添加甲酸可以显著提高青贮料乳酸含量（P〈0．05），并显著减少丁酸含量（P〈0．05）；V—Score评分体系中，添加甲酸后等级为良好，说明甲酸可以明显改善鹅观草的发酵品质；甲酸可使鹅观草青贮料的粗蛋白含量显著上升（P〈0．05）；添加量5．0g／kg和7．5g／kg处理组的可溶性碳水化合物显著升高（P〈0．05），酸性洗涤纤维含量显著下降（P〈0．05）。综合发酵品质和化学成分，发现甲酸可以有效改善鹅观草的青贮品质。
To explore the influence of formic acid additives on quality ot common roegnena grass silage, designing to add formic acid concentration of 2.5 g/kg, 5.0 g/kg and 7.5 g/kg to common roegneria silage material respectively, then investigating fermentation quality and chemical composition.The results show that pH value and ammonia nitrogen to total nitrogen content significantly decrease （P〈 0.05）. The treatment group of adding the largest amount of formic acid has the lowest pH value and ammonia nitrogen to total nitrogen content. Besides, lactic acid of silage material rises significantly （P〈 0.05）, and butyric acid content significantly decreases, adding formic acid level to common roegneria can obviously improve the fermentation quality by application of V-Score ratings system. Formic acid adding to common roegneria grass material has significant influence on crude protein（P〈O.05）. Only adding formic acid concentration of 5.0 g/kg and 7.5 g/kg treatment groups have significant differences on water-soluble carbohydrate and acid detergent fiber（P〈0.05）. Considering fermentation quality and chemical composition, we can come to the conclusion that formic acid can improve the quality of common roegneria silage.
出处
《牧草与饲料》
2011年第2期35-38,共4页
Journal of Forage & Feed
基金
基金项目：饲草型发酵混合饲料加工技术（2010-C15）
国家牧草产业技术体系项目（nycytx-37）资助.
关键词
鹅观草
青贮
甲酸
青贮品质
Common roegneria
Silage
Formic acid
Silage quality
作者简介
作者简介：冀旋（1987-），女，河北省人，硕士研究生，主要从事饲草加工贮藏与利用方面的研究。E-mail：20jixoan@163．com
通讯作者：玉柱，E-mail：yuzhu3@sohu．com
