北京平原区土壤地球化学特征及影响因素分析
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李欢, 黄勇, 张沁瑞, 贾三满, 徐国志, 冶北北, 韩冰
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Soil geochemical characteristics and influencing factors in Beijing Plain
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LI Huan, HUANG Yong, ZHANG Qin-Rui, JIA San-Man, XU Guo-Zhi, YE Bei-Bei, HAN Bing
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表2 土壤元素统计特征值
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Table 2 Statistical characteristics of elements in soil
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属性 | 指标 | 平均值 | 中位值 | 标准离差 | 变异系数 | 最小值 | 最大值 | 全国土壤 背景值[31] | 有害重金属 (类金属)元素 | As | 8.60 | 8.56 | 2.21 | 25.7% | 2.78 | 19.6 | 11.2 | Cd | 0.166 | 0.152 | 0.074 | 44.8% | 0.058 | 0.782 | 0.097 | Cr | 59.5 | 58.6 | 11.7 | 19.6% | 26.0 | 147 | 61.0 | Cu | 26.4 | 22.2 | 36.5 | 138% | 7.80 | 805 | 22.6 | Hg | 0.175 | 0.057 | 0.679 | 388% | 0.011 | 9.13 | 0.065 | Ni | 24.9 | 24.8 | 4.60 | 18.5% | 11.5 | 52.6 | 26.9 | Pb | 26.4 | 23.8 | 15.1 | 57.2% | 14.4 | 283 | 26.0 | Zn | 81.5 | 70.7 | 119 | 146% | 43.2 | 2833 | 74.2 | 养分 指标 | C | 1.59 | 1.47 | 0.76 | 47.6% | 0.28 | 6.78 | | N | 961 | 929 | 428 | 44.5% | 166 | 4013 | | P | 878 | 781 | 407 | 46.4% | 284 | 4872 | | S | 203 | 183 | 83.0 | 40.8% | 71.0 | 848 | | 有机质 | 1.72 | 1.54 | 0.97 | 56.3% | 0.18 | 9.03 | 3.31 | 有益微量 元素 | B | 40.2 | 39.3 | 10.3 | 25.5% | 14.6 | 83.1 | 47.8 | Br | 3.37 | 3.14 | 1.63 | 48.5% | 0.03 | 19.2 | 5.40 | Cl | 80.1 | 69.0 | 54.7 | 68.3% | 24.8 | 693 | | Co | 11.2 | 11.1 | 1.96 | 17.5% | 6.09 | 21.8 | 12.7 | Ge | 1.37 | 1.34 | 0.21 | 15.6% | 0.93 | 3.11 | 1.70 | Mn | 593 | 572 | 142 | 23.9% | 320 | 2064 | 583 | Mo | 0.69 | 0.65 | 0.19 | 27.4% | 0.37 | 2.36 | 2.00 | V | 74.1 | 73.1 | 10.8 | 14.6% | 43.6 | 125 | 82.4 | 健康 元素 | F | 506 | 487 | 112 | 22.1% | 270 | 1361 | 478 | I | 2.05 | 1.80 | 1.39 | 67.9% | 0.48 | 16.0 | 3.76 | Se | 0.29 | 0.23 | 0.36 | 122% | 0.05 | 5.79 | 0.29 | 常量 元素 | Al2O3 | 12.7 | 12.6 | 1.12 | 8.9% | 9.72 | 17.1 | 12.5 | CaO | 3.92 | 3.83 | 1.93 | 49.2% | 0.85 | 11.9 | 2.16 | Fe2O3 | 4.31 | 4.24 | 0.65 | 15.0% | 2.96 | 7.17 | 4.20 | K2O | 2.47 | 2.45 | 0.29 | 11.9% | 1.25 | 3.49 | 2.24 | MgO | 2.07 | 2.05 | 0.51 | 24.6% | 0.87 | 5.76 | 1.30 | Na2O | 2.08 | 2.05 | 0.38 | 18.2% | 0.60 | 3.65 | 1.37 | SiO2 | 60.1 | 60.3 | 2.90 | 4.8% | 49.6 | 66.5 | | 稀有稀土 元素 | Ce | 66.5 | 65.5 | 9.10 | 13.7% | 35.8 | 107 | 68.4 | La | 34.7 | 34.2 | 4.70 | 13.5% | 20.6 | 55.0 | 39.7 | Sc | 9.98 | 9.99 | 1.40 | 14.1% | 5.35 | 16.7 | 11.1 | Th | 9.46 | 9.48 | 1.95 | 20.6% | 2.78 | 17.0 | 13.75 | U | 1.87 | 1.86 | 0.27 | 14.5% | 1.03 | 3.08 | 3.03 | Y | 22.6 | 22.2 | 7.6 | 33.6% | 12.2 | 187.7 | 22.9 | 其他金属 元素 | Ag | 0.129 | 0.096 | 0.123 | 95.4% | 0.043 | 0.986 | 0.132 | Au | 3.85 | 2.00 | 7.14 | 186% | 0.46 | 87.61 | | Ba | 643 | 621 | 96.0 | 14.9% | 457 | 1476 | 469 | Be | 1.87 | 1.85 | 0.25 | 13.6% | 1.20 | 2.91 | 1.95 | Bi | 0.34 | 0.29 | 0.25 | 74.5% | 0.10 | 3.23 | 0.37 | Ga | 15.4 | 15.1 | 1.60 | 10.4% | 10.2 | 21.6 | 17.5 | Li | 28.3 | 27.3 | 7.70 | 27.3% | 14.1 | 104 | 32.5 | Nb | 14.0 | 13.8 | 2.00 | 14.0% | 8.80 | 25.6 | | Rb | 90.6 | 90.0 | 9.50 | 10.5% | 57.6 | 127 | 111 | Sb | 0.93 | 0.87 | 0.72 | 77.5% | 0.32 | 16.4 | 1.21 | Sn | 3.50 | 2.72 | 4.22 | 121% | 1.50 | 59.4 | 2.60 | Sr | 285 | 280 | 96.0 | 33.6% | 77.0 | 833 | 167 | Ti | 3695 | 3629 | 533 | 14.4% | 2170 | 7519 | 3800 | Tl | 0.61 | 0.60 | 0.08 | 12.7% | 0.40 | 1.10 | 0.62 | W | 1.64 | 1.53 | 1.50 | 91.2% | 0.71 | 34.2 | 2.48 | Zr | 248 | 243 | 39.0 | 15.7% | 171 | 587 | 256 | 酸碱度 | pH | 7.56 | 7.75 | 0.62 | 8.2% | 3.73 | 8.48 | 6.70 |
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