基于主成分和聚类分析的德宏橡胶林土壤肥力评价

Evaluation of Soil Fertility of Rubber Plantation in Dehong Based on Principal Component and Cluster Analysis

基于德宏橡胶林的78份土壤样本数据,采用主成分分析法和聚类分析法对橡胶林土壤肥力进行综合评价。结果表明:德宏橡胶林土壤pH均值为4.83;土壤有机质、全钾、全氮和碱解氮养分较丰富,变异系数在16.53%~46.90%之间,呈中等变异性;但全磷和有效磷含量普遍低,处于缺磷状态。土壤肥力综合评价结果:橡胶林土壤IFI值范围10.81~25.29,均值为17.24,属于中等以上肥力的土壤占到83.34%。采样区域肥力水平从高到低依次为盈江农场>瑞丽农场>畹町农场>遮放农场。综上,德宏橡胶林土壤肥力总体水平处于良好,应重视测土配方施肥,重点增施磷肥。

The soil fertility of rubber plantation by principal component and cluster analysis based on 78 soil samples of rubber plantation in Dehong was evaluated. The results showed that the pH value was 4.83, the content of soil organic matter, total potassium, total nitrogen and alkaline nitrogen was sufficient and moderate variability, the CV was between 16.53% to 46.90%. But the content of total phosphorus and available phosphorus was very low. Comprehensive assessment of soil fertility revealed that the integrated fertility index IFI was 17.24, ranged in 10.81-25.29. There were 83.34% soils belonged to moderate fertility. The soil fertility level was in the order downward Yingjiang Farm, Ruili Farm, Wanding Farm, Zhefang Farm. The soil fertility of rubber plantation is moderate and phosphate should be applied in Dehong.