中国草地学报2025，Vol.47Issue(11)：49-60,12.DOI:10.16742/j.zgcdxb.20240394
刈割对狗牙根和多年生黑麦草功能性状和补偿性生长的影响
The Effects of Mowing on the Functional Traits and Compensa-tory Growth of Cynodon dactylon and Lolium perenne
摘要
Abstract
Mowing is a common management and utilization method in grasslands.Understanding the ecological adaptive strategies of plant to mowing disturbance is the prerequisite for scientific implementa-tion of mowing management.This study was conducted using a pot controlled experiment to investigate the effects of three mowing intensities on the functional traits and compensatory growth of Cynodon dactylon and Lolium perenne.The results showed that with the increase of mowing intensity,plant height,leaf area,root length,and root surface area of both C.dactylon and L.perenne decreased significantly.After 15 days of mowing,the tiller number of C.dactylon significantly increased under moderate and high mow-ing intensities,while mowing significantly increased the growth rate of both species.The aboveground bio-mass of both C.dactylon and L.perenne reached the peak under light mowing intensity,which was signifi-cantly higher compared with that of the control.The specific root length of C.dactylon,and the specific leaf area and specific root length of L.perenne were significantly decreased with the rising mowing intensi-ties.The compensation index of C.dactylon was the highest under light mowing,whereas L.perenne had the highest compensation index under moderate mowing.Both species demonstrated compensatory growth in plant height under their respective mowing intensities,reaching overcompensation levels.Based on the integrated responses of traits including tiller number,growth rate,biomass and its allocation,post-mowing response of C.dactylon primarily is characterized by increases in tiller number and growth rate,whereas under light to moderate mowing,L.perenne exhibited increased aboveground biomass,a reduced root:shoot ratio,and higher growth rates during late growth.This suggests that the two species may achieve compensatory growth through different trait adjustments.关键词
刈割/狗牙根/多年生黑麦草/补偿性生长/表型可塑性Key words
Mowing/Cynodon dactylon/Lolium perenne/Compensatory growth/Phenotypic plasticity分类
农业科技引用本文复制引用
姜乐天,王青,韩瑞鑫,席海森,吴铮,方思凯,平晓燕..刈割对狗牙根和多年生黑麦草功能性状和补偿性生长的影响[J].中国草地学报,2025,47(11):49-60,12.基金项目
北京林业大学科技创新计划项目(S202310022251) （S202310022251）
国家林业和草原局揭榜挂帅项目(202401-06-04) （202401-06-04）
国家林业和草原局业务委托项目(2024043003) （2024043003）
