关键词: 喀斯特, 植被, 立地类型, 主导因子, 毕节

Abstract: The geological landform, soil and vegetation were investigated in sample plots of Bijie. Correlation between the ecological factors and species number of arbor, shrub, herb and vegetation types were analyzed with the multivariate regression analysis. The results showed that major influential factors of site type classification for vegetation restoration were landform, altitude, lithology, bedrock expose rate and slope. Furthermore, the climate factors were designated as the parameter for classifying site districts; the site type groups and the bedrock expose rate and slope for site types.The 256 site types were classified by combining 4 districts, 4 groups, 4 bedrock expose rates and 4 slope, produced by the Fuzzy cluster method based on their classifying parameters.

Key words: Karst, vegetation, site type, major influential factors, Bijie