本文通过对豫西和豫南天然次生林的大量群落样地调查，以主分量分析（ＰＣＡ）与回归分析（ＲＡ）相结合，定量地揭示了河南天然次生林群落的组成和分布在多维生态空间上梯度变化的宏观格局，建立了包括２７个乔木建群种和６个主要环境因子在内的主分量模型和回归模型，为河南林业生产、林种布局及树种选择提供了理论依据 Based on the investigation of a large number of communities in natural secondary forests in western Henan and southern Henan Provinces, PCA and RA were combined to quantitatively reveal the composition and distribution of natural secondary forest communities in Henan in multi-dimensional ecological space Gradient and macroscopic pattern, a principal component model and regression model including 27 tree species and 6 major environmental factors were established, which provided the theoretical basis for the forestry production, species distribution and tree species selection in Henan Province