云南野生苏铁就地保护区生境研究

云南野生苏铁分布区的生境调查定性研究已见不少报道，但定量研究报道尚少。文章应用SPSS统计分析软件，对研究区321块野生苏铁分布样点中的21个苏铁特征因子和生境因子组成的6741个调查数据信息进行平均值计算分析、聚类分析及主成分分析，得出各种苏铁自然分布中联系最为密切的生境因子值，并分析了云南野生苏铁的古滇分布中心及目前云南野生苏铁分布区域狭窄的原因。

Study on Habitat of Wild Cycas Revoluta Nature Reserve in Yunnan Province

Studies on the habitat of wild Cycas revoluta in Yunnan province have been reported a lot, but quantitative studies hand is scarce. By means of SPSS （statistic package for social science） , the article conducts average analysis, cluster analysis and principal component analysis on 6 741 investigation data information comprised of 21 Wild Cycas revoluta characteristic and habitat factors from the 321 distribu- tion spots of Wild Sago Palm. The most relative habitat factor values of the natural distribution of Wild Cycas revoluta is revealed, and the reason for the narrowness of ancient Yunnan province as a distribution center of wild Cycas revoluta and the present growing areas is deduced.