单 位：
内蒙古农业大学草原与资源环境学院草地资源教育部重点实验室农业农村部饲草栽培加工与高效利用重点实验室内蒙古自治区草地管理与利用重点实验室
关键词：
羊草割草地;刈割技术;干草产量;营养品质
摘 要：
适宜的留茬高度对羊草割草地的牧草生长与牧草营养品质有着重要的作用。本文以呼伦贝尔羊草割草地为研究对象,研究不同的刈割时期与刈割留茬高度对牧草的经济产量及养分含量的影响。本实验设置3个刈割时间,4个留茬高度,每个处理3次重复,采用随机区组实验设计。结果表明,8月15日刈割的植物群落地上生物量显著高于其他刈割时期;随着刈割时间的推迟,群落ADF和NDF含量先上升后下降。留茬高度2cm的群落地上生物量显著高于留茬高度8cm(P<0.05),但与留茬高度5cm间无显著差异(P>0.05),不同刈割时期不同留茬高度下群落粗蛋白(CP)含量无显著差异(P>0.05)。呼伦贝尔羊草割草地适宜刈割时间为8月15日左右,以留茬高度2-5cm为宜。
译 名：
Effects of different cutting times and heights on the yield and quality of Leymuschinensis grassland
作 者：
Tian Ye;Zhang Shuang;Liu Jia;Que Guoping;Li Ze;Wei Zhijun;College of Grassland Resources and Environment,Key Laboratory of Grassland Resources of the Ministry of Education,Key Laboratory of Forage Cultivation,Processing and High Efficient Utilization of the Ministry of Agricultureand Rural Affairs,Inner Mongolia Autonomous Region Key Laboratory of Grassland Management and Utilization,Inner Mongolia Agricultural University;
关键词：
Leymus chinensis grassland;;Cutting technology;;Hay yield;;Nutrition quality
摘 要：
Suitable stubble height was very important to the growth and nutrient quality of forage grass in Leymuschinensis grassland.The effects of different cutting periods and stubble heights on the economic yield and nutrient content of forage were studied in this paper.Three cutting times and four stubble heights were set,and each treatment and of three replications.Random complete block design was used.The results showed that the plant community aboveground biomass mowed on August 15 was significantly higher than that of other cutting times.With the delay of mowing time,the content of ADF and NDF in the community increased first and then decreased.The aboveground biomass of communities with stubble height of 2 cm was significantly higher than that with stubble height of 8 cm(P<0.05),but there was no significant difference with stubble height of 5 cm(P>0.05),and there was no significant difference in the content of communities crude protein(CP)with different stubble heightsand different clipping periods(P>0.05).The suitable cutting time of Hulunbuir Leymus chinensis grassland is about August 15,with the stubble height of 2-5 cm.
