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 + nitrogen 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 significant 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.

Community stability  /  Mowing  /  Nitrogen addition  /  Species asynchrony  /  Temporal stability