关键词: 山地草甸, α和β多样性, 环境因子, 草甸管理

Abstract: The changing variation of plant diversity all around mountain meadow were studied in different management categories in Hongsongwa Natural Reserve of China,Hebei,through using cluster analysis and α and β diversity index statistically based on various data of 15 plots.The results showed that:15 plots were clustered into five sections.The transitional sites from the core to the buffer area inclusive of the low region in the core area were divided into two sections individually.In α diversity,the results based on individuals and importance value are all the same.Value of the lowest richness,evenness and diversity as well as the highest dominance are located in the centre of the core area and the buffer area.In the transitional site among different areas,value of richness,evenness and diversity are ranged as the highest,and of dominance as the lowest.β diversity indices are fluctuated in wavy variations among plots,indicating that the habitat of the observed region was fragmented more or less by human activities.The rate of substitution among local plant species was emerged towards the fastest in the transitional sites between the core area and the buffer area,and lowest record was appeared in the center sites of the buffer area,variations of plant diversity indices were also prevailed like wavy motion with the changes of environmental factors,such as soil water content,topographical altitude,slope aspect and so on,showing that the plant diversity was somewhat influenced intensely by various ways and means of meadow management.

Key words: Mountainous meadow, α and β diversity, Environmental factors, Meadow management