基于主成分聚类法的典型黑土区土壤地球化学分类

刘凯, 戴慧敏, 刘国栋, 宋运红, 梁帅, 杨泽

Geochemical classification of the soil in a typical black soil area using the principal component analysis combined with K-means clustering algorithm

LIU Kai, DAI Hui-Min, LIU Guo-Dong, SONG Yun-Hong, LIANG Shuai, YANG Ze

表3 各类别样品常量元素平均值统计

Table 3 Statistical table of mean values of major elements in various classifications%

类别 样品数 SiO2 Al2O3 Fe2O3 CaO K2O MgO Na2O I类 18 56.15 14.37 6.16 3.06 2.90 3.63 2.19 II类 6512 64.66 13.59 4.87 1.26 2.39 1.21 1.45 III类 10023 63.07 14.46 5.19 1.57 2.50 1.45 1.54 IV类 778 59.24 12.86 4.39 5.04 2.35 1.70 1.66 V类 5557 66.75 13.51 4.24 1.38 2.65 1.18 1.94