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运用因子分析法评价了长江汝溪河流域不同植被类型的土壤肥力,通过计算和分析特征根、累计贡献率、因子载荷矩阵、各土层主成分因子及其综合得分,得出汝溪河流域不同植被类型土壤肥力丰缺状况、变化规律及其影响因素,进而找到改善和提高土壤肥力的方法和途径。分析表明:pH值和主要养分指标随着土层深度的加深而逐渐下降,各植被类型在不同土层的养分含量具有较大差异,土壤养分管理需要综合考虑不同因子的主成分得分与综合得分情况,该分析结果可对该区域内森林抚育、水土流失防治、土壤可持续利用等提供参考依据。
The soil fertility of different vegetation types in the Ruxi River Valley was evaluated by factor analysis method. By calculating and analyzing the characteristic roots, cumulative contribution rate, factor load matrix, principal component factors of each soil layer and their comprehensive scores, The status of soil fertility, its changing rules and its influencing factors in different vegetation types, and then to find ways and ways to improve and enhance soil fertility. The results showed that: the pH value and the main nutrient index decreased gradually with the deepening of soil depth, and the nutrient contents of different vegetation types differed greatly among different vegetation types. Soil nutrient management needed to consider the combination of principal component scores and comprehensive scores of different factors The results of this analysis can provide references for forest tending, soil erosion control and soil sustainable utilization in this region.