北京山区油松水源林群落因子与土壤及地形因子关系研究

为研究土壤与地形及植被因子间的作用关系,选取了24个相关的指标因子,采用主成分分析法对24个因子进一步分析,第一主成分(贡献率为32.66%)体现了地形因素,成为影响土壤因子变化的最重要方面;第二主成分体现出土壤涵水能力因子;第三主成分和第四主成分为土壤肥力的重要指标因子;第五主成分为植被因素的重要的指标因子。对北京山区油松水源林25块典型样地土壤因子数据进行初步统计后,得出样地间土壤因子含量存在着极显著的差异,造成差异的主要原因有地形因素和植被因素。

Relationship among Community, Soil & Terrain Factors of Water Conservation Forest of Pinus tabulaeformis in Beijing Mountainous area

To reveal function relation among soil,terrain & vegetation factor,24 related index-factors were selected and analyzed by using principle component analysis method.The first principal component(contribution being 32.66%),which shows the terrain factors,became the most important aspects affecting soil factors;the second principal component shows factor of the capacity of preserving water;the third & forth principal component are important index-factors of soil fertility factors;the fifth principal component ...