不同密度对天然牧草青贮料品质的影响  

Influence of Different Compactions on the Quality of Native Grass Silage

作　　者：李海[1] 贾玉山[1] 格根图[1] 李长春[1] 邓振军[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《华北农学报》2008年第2期143-146,共4页Acta Agriculturae Boreali-Sinica

基　　金：国家"十一五"技术支撑项目资助(2006DAD16B08)

摘　　要：为确定天然牧草青贮的最适宜密度,以锡林郭勒盟典型草原牧草为青贮原料,在青贮其他条件一致的情况下,试验就青贮密度设计了4个处理(200,250,300,400 kg/m3),通过比较不同处理天然牧草青贮料之间的感官指标、常规营养成分及有机酸的组成成分含量,综合评定每个处理天然牧草青贮料的品质。结果表明:综合评定4种处理的感官指标以散草密度300 kg/m3的青贮效果相对较好;从营养成分分析看,密度300 kg/m3在青贮后粗蛋白、无氮浸出物和TDN含量在干物质中的含量相对较高,保存较好;从有机酸的角度综合评价,得出密度为300 kg/m3时较有利于天然牧草的发酵。从感官品质、常规营养成分含量和有机酸组成综合评定,天然牧草青贮的最佳密度应选在300kg/m3左右。The purposes were to determine the suitable density of native grass in silage. The effect of 4 different densities（200,250,300,400 kg/m^3 ）on the quality of native grass silage in typical steppe of Xilinguole was studied. Sensory indicators, contents of nutrients and organic acid were determined. The results indicated when native grass density was 300 kg/m^3, the sensory indicators, contents of crude protein, nitrogen-free extract, the total digestible nutrition （TDN） and organic acid content were higher than other densities, and 300 kg/m^3 was beneficial to native grass fermentation. Therefore, the optimum density of native grass silage was 300 kg/m^3 .

关 键 词：天然牧草 密度 青贮 综合评定 

分 类 号：S816.32[农业科学—饲料科学]