基于主成分聚类法的典型黑土区土壤地球化学分类
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刘凯, 戴慧敏, 刘国栋, 宋运红, 梁帅, 杨泽
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Geochemical classification of the soil in a typical black soil area using the principal component analysis combined with K-means clustering algorithm
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LIU Kai, DAI Hui-Min, LIU Guo-Dong, SONG Yun-Hong, LIANG Shuai, YANG Ze
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表1 黑土区常量元素参数统计
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Table 1 Statistical table of major elements in black soil area
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类型 | 元素 | 最小值/% | 最大值/% | 平均值/% | 中位数/% | 标准偏差/% | 偏度 | 峰度 | 变异系数 | 表层土壤 | SiO2 | 41.87 | 80.46 | 64.55 | 64.80 | 2.95 | -0.67 | 2.87 | 0.05 | Al2O3 | 7.88 | 16.62 | 13.95 | 13.98 | 0.78 | -0.59 | 2.95 | 0.06 | Fe2O3 | 0.95 | 10.49 | 4.77 | 4.76 | 0.62 | 0.08 | 4.67 | 0.13 | K2O | 1.72 | 3.98 | 2.50 | 2.50 | 0.15 | 0.63 | 4.31 | 0.06 | Na2O | 0.72 | 4.66 | 1.62 | 1.56 | 0.29 | 1.82 | 6.44 | 0.18 | CaO | 0.55 | 15.03 | 1.56 | 1.39 | 0.82 | 6.25 | 57.76 | 0.53 | MgO | 0.21 | 3.50 | 1.29 | 1.30 | 0.21 | 0.24 | 3.21 | 0.17 | 深层土壤 | SiO2 | 44.67 | 75.41 | 64.34 | 64.66 | 2.51 | -0.36 | 3.10 | 0.04 | Al2O3 | 9.01 | 18.50 | 14.79 | 14.89 | 0.80 | -0.80 | 3.61 | 0.05 | Fe2O3 | 1.38 | 9.08 | 5.12 | 5.16 | 0.78 | -0.27 | 2.58 | 0.15 | K2O | 1.61 | 3.68 | 2.62 | 2.63 | 0.17 | 0.30 | 4.69 | 0.06 | Na2O | 0.53 | 3.66 | 1.67 | 1.64 | 0.28 | 1.38 | 5.60 | 0.17 | CaO | 0.35 | 15.41 | 1.41 | 1.25 | 0.66 | 4.30 | 28.73 | 0.47 | MgO | 0.36 | 3.09 | 1.37 | 1.40 | 0.24 | -0.37 | 2.92 | 0.17 |
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