应用多元统计分析分辨森林土壤肥力类型初探

本试验是为改造低产林分而开展的土壤调查,目的是查明林区内土壤肥力类型,为改变树种结构,建立多种生产模式,开展综合经营,提供基础资料。通过主分量分析找出碳氮、速效磷、坡形坡位和坡向是构成森林土壤肥力的主要因子;聚类分析所得4个肥力类型所表明的土壤肥力差异,对合理利用土壤资源,实行多种经营有实际意义。

A PRELIMINARY STUDY ON DIFFERENTIATION OF THE FERTILITY OF FOREST SOIL WITH STATISTICAL METHOD

A soil survey was made on differentiation of the fertility of forest soil with statistical method so that some basic data were collected for promoting the production of poor forest stands. The findings of the nitrogen and organic matter, the degree of forest site slope, the positions and aspects of the slope, and the phosphorus pentoxide through principal component analysis were proved to be important factors, and the differences indicated by the four types of soil fertility obtained from cluster analysis are of grcat consequence in rational use of soil resources and practice of diversification in forestry.