摘要
本文于2013-2014年在内蒙古呼和浩特市和林格尔县种植的老芒麦(Elymus sibiricus)和草地雀麦(Bromus riparius)单播草地上进行不同频次刈割(一年刈割1次、2次、3次和4次)试验,调查各刈割处理产量、枝条数和植株高度,分析了老芒麦和草地雀麦产量的影响因子及其与枝条数和高度之间的关系。研究表明:刈割极显著降低了老芒麦的再生枝条数(P<0.01),从而影响其产量,产量与植株高度无显著相关性;草地雀麦产量不受刈割频次的影响,刈割增加了其再生枝条数,在高频次刈割时会通过增加其再生枝条数来缓解植株高度降低的问题,但随着刈割茬次的增加其再生草产量仍会降低(P<0.01)。内蒙古呼和浩特地区老芒麦和草地雀麦的适宜的刈割频次均为每年2次。
We studied mowing times（one times,twice,third and forth times per year）on the monoculture grassland of Elymus sibiricus and Bromus riparius from 2013-2014 in Helinger Hohhot Inner Mongolia,and measured yield,number of sub-branches and heights of forages,then analysed the correlations between the impacting factors of yield and sub-braches and heights.Studies showed that mowing extremely reduced regeneration branch number of Elymus sibiricus（P〈0.01）,thus affected its production.The correlations between yield and heights of Elymus sibiricus were not significant.Mowing frequency had no effect on the yield of Bromus riparius,but mowing increased its regeneration branch number.High frequency mowing increased the regeneration branch numbers to alleviate the problem of low plant height.But regeneration grass production extremely reduced with the increase of mowing frequency（P〈0.01）.The best mowing times of Elymus sibiricus and Bromus riparius were twcie per year in Hohhot Inner Mongolia.
出处
《草地学报》
CAS
CSCD
北大核心
2017年第2期395-400,共6页
Acta Agrestia Sinica
基金
内蒙古温性草原牧区"生产生态生活"优化保障技术集成与示范(2012BAD13B02)
牧区优质高效饲草生产利用技术研究示范项目(201003023)资助
关键词
老芒麦
草地雀麦
刈割频次
生产力
Elymus sibiricus
Bromus riparius
Mowing times
Production
