应用主成分分析和聚类分析评价不同施肥处理条件下新垦淡灰钙土土壤肥力质量

Evaluation on Soil Fertility Quality of Newly Cultivated Light Sierozem Under Different Fertilization with Methods of Principal Component and Cluster Analyses

通过定位试验与室内分析,研究了新垦淡灰钙土的化学、物理、生物学性质,并从中挑选出10个能反映土壤肥力质量特性的定量因子,作为评价指标,采用主成分分析,对淡灰钙土开垦前以及开垦后不同施肥处理进行了综合评分,然后用欧氏距离最短距离法对其进行了聚类。结果表明:淡灰钙土经过开垦、灌溉、种植农作物,土壤肥力质量提高;开垦后不同施肥处理比较,单施有机肥与有机肥配施化肥土壤肥力质量较高,N、P以及与其他化学肥料配施次之,单施N肥与不施肥较差。

This paper studied the chemical, physical and biological properties of newly cultivated light sierozem by field experiment and lab analysis, 10 indexes were selected and the methods of principal component and cluster analyses were used to evaluate soil fertility quality. The results showed that soil fertility quality of sierozem improved after cultivation, irrigation and crop-planting, and the application of organic manure or combined with chemical fertilizers could improve soil fertility quality of sierozem more effectively.