Abstract: [Objective]Based on the investigation of Spring-Autumn deteriorate grassland communities, [Method]species community characteristics and vegetation quantity were analyzed, the findings from the analysis are follows: there are regularity between the community Diversity index.The community deversity were as follows:LD>MD>HD>ED and the homogeneous degree were as follows:MD>LD>HD>ED; meanwhile, heavy and moderate-degraded were unstable period of degradation.

摘要： [目的]探讨春秋场草地退化演替规律.[方法]群落特征和植被数量分析.[结果]春秋场草地退化严重,不同退化梯度间的多样性呈现一定的规律性.[结论]群落多样性呈现出轻度退化>中度退化>重度退化>极度退化的规律,均匀度呈现中度退化>轻度退化>重度退化>极度退化;群落退化直接影响物种多样性变化;同时,中度、重度退化阶段属于不稳定阶段.