【摘要】 采用主成分分析法对渍害土壤的 10项肥力指标进行了综合分析。结果表明 :由主成分分析划分的 3个主成分可全面概括 10项土壤肥力指标的绝大部分信息 ,且第一主成分与作物的产量呈显著相关 ,r=0 .5 5 73;依此 3个主成分对各样点进行聚类分析 ,可划分为 4个不同肥力类型 ,并提出了相应的改土措施。更多还原

【Abstract】 The integrated evaluations of waterlogged soil fertility were studied with 10 soil fertile indexes based on principle component analysis(PCA) in this paper. The results showed that main messages of the 10 soil fertile indexes can be included by three principle components, the first principle component was significantly correlation with corresponding rice yield, r=0.5573; that the seventeen waterlogged soil were divided into four fertile type by cluster analysis and their ameliorate methods were found out.更多还原