宁夏荒漠草原植物群落的种间关系  

Plant interspecific relationships in desert steppe of Ningxia

作　　者：李潮[1] 谢应忠[1] 许冬梅[1] 李侠[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《草业科学》2013年第11期1801-1807,共7页Pratacultural Science

基　　金：国家自然科学基金项目(31160484)

摘　　要：应用χ2检验、Jaccard关联指数、Pearson相关系数和Spearman秩相关系数对宁夏东部风沙区荒漠草原植物群落进行种间关系研究,分别测定了21种植物,共210个物种对数的种间关系。结果表明,1)χ2检验共有21个物种对数为显著正关联,25个物种对数为显著负关联;Pearson相关系数有12个物种对数为显著正相关,6个物种对数为显著负相关;Spearman秩相关系数有21个物种对数为显著正相关,10个物种对数为显著负相关。2)宁夏东部风沙区荒漠草原植物群落的种间关联性较弱,而且植物群落旱生化,稳定性较低,尚处于演替之中。studied by terspecific Chi-square measured, in this relationships of communities in desert steppe of eastern Ningxia area d test, Jaccard association index, Pearson＇s correlate coefficient and Spearm fficient. Int study. The tive correlations, and 25 spec erspecific relationships of 210 species pairs belonging to 21 plant species results of Chi squared test showed that 12 species pairs have significant ies pairs have significant negative correlations. Pearson＇s correlate coeffi were an＇s were posi- cient indicated that 12 species pairs have significant positive correlations, and 6 species pairs have significant negative correlations. Spearman＇s rank correlate coefficient indicated that 21 species pairs have significant positive correlations and 10 species pairs have significant negative correlations. 2） Interspecific association of plant communities in desert steppe of eastern Ningxia area is weak. Plant communities in this area which are high level of xerophilization, have low stability, and are still in succession process.

关 键 词：植物种间关系 X2检验 Jaccard关联指数 Pearson相关系数 Spearman秩相关系数 

分 类 号：S812[农业科学—草业科学]