不同留茬高度苜蓿根内营养物质含量与干草品质的相关性研究  

The relative research between the nutrient content in alfalfa root and hay quality under different stubble height

作　　者：王伟[1] 贾玉山[1] 周天荣[1] 尹强[2] 格根图[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 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《草原与草业》2015年第2期44-49,共6页Grassland and Prataculture

摘　　要：为了研究留茬高度对苜蓿粗蛋白及返青率的影响,本试验以3年生＂金皇后＂紫花苜蓿为研究材料,研究不同留茬高度下苜蓿根内营养物质含量与粗蛋白、相对饲用价值及返青率之间的关系。结果表明：随着留茬高度的增加,苜蓿根内营养物质含量均呈现上升的趋势;当最后一次留茬高度高于8cm时,返青率将大于70%,其中留茬高度8-11cm处理返青率高达79.2%,返青效果较好。考虑到根内营养物质含量对苜蓿粗蛋白含量及返青率的影响,建议银川地区第一、二、三茬留茬高度为5-8cm,最后一次留茬高度以不低于8cm为宜。In order to study the effect of stubble height on crude protein and green rate of alfalfa,this experiment choose the 3years＂golden queen＂as research material,and study the relationship between the nutrient content in alfalfa root with different stubble height and crude protein,RFV and green rate.The result shows that：with the stubble height increase,the nutrient content in root of alfalfa showed the rising trend;if the last stubble height is more than 8cm,the green rate will higher than 70%,and green rate of 8-11cm measure was as higher as 79.2%,green effect is best.In view of the nutrient content in root will effect the crude protein and green rate of alfalfa,this paper advises the first、second and third time stubble height is 5-8cm,the last stubble height is at least 8cm.

关 键 词：苜蓿 留茬高度 根内营养物质 干草品质 返青率 

分 类 号：S816[农业科学—饲料科学]