摘要：采用数值分类方法研究了金沙江干热河谷区人工林生长与土壤母质一母岩的关系。选取反映本区植被生长状况的树高、树胸径、树胸高断面积、全林生物量、树高增长率、树胸径增长率和全林净生产量等7个分类特征指标作为变量，采用主成分分析与判别分析构成的综合分类方法对本区主要成片造林区14个样地的林分生物量和生产力进行归类。结果表明，本区林分生物量和生产力基本上取决于林地土壤母质一母岩类型，而与其它因素关系较弱；不同土壤母质一母岩类型的林分生物量和生产力的大小顺序为：谷地冲积物>坡地片岩/砾石层>坡地泥岩。

The vegetation growth of afforested land was studied by numerical classification techniques in the Dry-hot Valleys the Jinsha River, southwestern China. Seven indices that represent the comprehensive nature of vegetation growth were selected as the variables of numerical classification, being tree height, tree diameter at breast height (DBH), total basal area at tree breast height, forest biomass, tree height growth rate, DBH growth rate, and forest net production. Given this condition, the forest productivity of 14 sample plots was classified by a combination of principal component analysis technique with discriminant analysis technique. The result showed that the forest productivity in this area was mostly dependent of the soil parent material rock types of slopeland. The magnitude of forest productivity for different parent material rock types was in order :alluvial deposits > schist gravel deposits >mudstone.