关键词: 农作物种植区, 生态类型区划, 主成分分析, 动态逐步聚类

Abstract: Taking tobacco-planting areas as research objects,the experimental study of ecological and classification of climate type were carried out by using the methods of principal component analysis and dynamic stepwise cluster analysis of Statistical Program for Social Sciences(SPSS).The results were output in GIS platform.The method integrated various ecological factors,such as climate,geography,and soil,so the divisional result was more objective and quantitative.The results could be extension cited.Eliminating factors of human disturbance,the result which was based on ecological type divided Chuxiong prefecture into five regions: low elevation excess heat,rich wet tobacco area,middle elevation warm tobacco area,high altitude warm cool tobacco area,low-medium rich hot area and non hot planting area.The divisional result was consistent to several years planting practice in the area,and had practical significance in guiding tobacco production.

Key words: Crop planting areas, Ecotype division, Principal component analysis, Dynamic stepwise cluster analysis