应用因子分析探讨影响甘草地理分布的环境因素

Application of factor analysis to studying environmental factors with influencing effects on geographical distribution of Glycyrrhiza Radix et Rhizoma

目的应用因子分析探讨影响甘草地理分布的生态主导因子。方法收集统计具有甘草分布的地区以及这些地区的地理环境因素,包括经度、纬度、海拔高度、无霜期、平均风速、大风日数、年均温度、一月平均温度、七月平均温度、≥10℃积温、蒸发量、降水量、年日照时数、年太阳总辐射量等,应用SPSS 17.0统计软件进行因子分析。结果提取出5个公因子,分别为热量因子、地理因子、光照因子、降水因子和风况因子,这5个因子的累积贡献率达87.64%。同时得到各个甘草分布地区的因子总得分。结论热量因子是影响甘草地理分布的生态主导因子,因子总得分高的地区甘草生长分布的适宜性强。

Objective Application of factor analysis to studying ecological dominant factors with influencing effects on geographical distribution of Glycyrrhiza Radix et Rhizoma.Methods Gathering statistics of the regions（city and county） with Glycyrrhiza Radix et Rhizoma distribution and the geographical environment factors of them,including longitude and latitude,elevation,frostless season,average wind speed,gale days,annual averrage temperature,January average temperature,July average temperature,≥10 ℃ accumulative temperature,evaporation,precipitation,annual sunshine hours,annual global solar radiation,etc.And then SPSS 17.0 software is used in the factor analysis.Results Five common factors,which are heat factor,geographical factor,illumination factor,precipitation factor,and wind conditon factor,are extracted,and the accumulative contribution rate of them is up to 87.64%.Factor total score of each region with Glycyrrhiza Radix et Rhizoma distribution is obtained.Conclusion The heat factor is the ecological dominant factor influencing on geographical distribution of licorice,the region with high factor total score is more appropriate for the growth and distribution of Glycyrrhiza Radix et Rhizoma.