草地学报2026，Vol.34Issue(8)：3070-3080,11.DOI:10.11733/j.issn.1007-0435.2026.08.029
内蒙古草甸草原物种多样性和群落稳定性对刈割和施氮的季节响应
Seasonal Responses of Species Diversity and Community Stability in a Meadow Steppe in Inner Mongolia to Mowing and Nitrogen Addition
摘要
Abstract
Investigating the responding mechanisms of species diversity and community stability to disturbance has significant importance.This study examined the seasonal responses of species diversity and community stability to different grassland management practices(control,nitrogen application,mowing,mowing+nitro-gen application)in the meadow steppe of Inner Mongolia.Research findings showed that nitrogen addition reduced species diversity overall,whereas mowing maintained higher species diversity.Species diversity and community stability exhibited asynchronous changes across different months within the growing season,yet showing an overall positive correlation.The Pielou evenness index demonstrated a highly significant positive correlation with community stability(P<0.01).All grassland management measures enhanced community temporal stability,and significant improvements observed under mowing plus nitrogen application and mowing treatments(P<0.05).Nitrogen addition reduced species asynchrony,whereas both mowing plus nitrogen application and mowing treatments increased species asynchrony.Community temporal stability showed a sig-nificant positive correlation with species asynchrony(P<0.05).Species diversity and species asynchrony jointly maintained community stability.Mowing enhanced species diversity and asynchrony,thereby promoting community stability.Nitrogen addition reduced species diversity,but this negative impact could be mitigated through mowing.The findings of this study provide a reference basis for sustainable grassland management.关键词
群落稳定性/刈割/施氮/物种异步性/时间稳定性Key words
Community stability/Mowing/Nitrogen addition/Species asynchrony/Temporal stability分类
农业科技引用本文复制引用
陈鹏,余国杰,刘蓬月,项梦雨,张晓宇,李佳桐,平晓燕..内蒙古草甸草原物种多样性和群落稳定性对刈割和施氮的季节响应[J].草地学报,2026,34(8):3070-3080,11.基金项目
国家林业和草原局揭榜挂帅项目(202401-06) （202401-06）
国家林业和草原局业务委托项目(2024043003)资助 （2024043003）
