典型岩溶地质高背景土壤镉生物有效性及其控制因素研究
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郭超,文宇博,杨忠芳,李伟,管冬兴,季峻峰
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Factors controlling the bioavailability of soil cadmium in typical karst areas with high geogenic background
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Chao Guo,Yubo Wen,Zhongfang Yang,Wei Li,Dongxing Guan,Junfeng Ji
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表1 研究区土壤基本理化性质(n=53)
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Table 1 The physicochemical properties of soils in the study area(n=53)
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项目 | 最小值 | 最大值 | 平均值 | 标准差 | 变异系数 | 全国土壤背景值[16] | 地壳丰度[17] | 富集系数 |
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SiO2 (%) | 27.12 | 86.16 | 66.61 | 13.3 | 0.2 | | 66.62 | | TiO2 (%) | 0.1 | 0.96 | 0.4 | 0.17 | 0.42 | 0.51 | 0.64 | 0.8 | Al2O3 (%) | 5.43 | 22.28 | 12.62 | 3.12 | 0.25 | 12.5 | 15.4 | 1.01 | TFe2O3 (%) | 1.29 | 12.64 | 5.09 | 2.04 | 0.4 | 4.2 | 5.6* | 1.21 | MgO (%) | 0.27 | 1.21 | 0.56 | 0.19 | 0.35 | 1.3 | 2.48 | 0.43 | CaO (%) | 0.29 | 23.5 | 3.19 | 5.98 | 1.87 | 2.16 | 3.59 | 1.48 | Na2O (%) | 0.07 | 0.53 | 0.17 | 0.1 | 0.62 | 1.37 | 3.27 | 0.12 | K2O (%) | 0.14 | 2.27 | 1.13 | 0.6 | 0.53 | 2.23 | 2.8 | 0.5 | As (mg·kg-1) | 2.55 | 56.15 | 14.27 | 9.98 | 0.7 | 11.2 | 4.8 | 1.27 | Cd (mg·kg-1) | 0.17 | 7.69 | 1.78 | 2.03 | 1.14 | 0.097 | 0.09 | 18.36 | Cr (mg·kg-1) | 50.2 | 1442.7 | 160.39 | 198.11 | 1.24 | 61 | 92 | 2.63 | Cu (mg·kg-1) | 15 | 59.1 | 33.82 | 9.65 | 0.29 | 22.6 | 28 | 1.5 | Hg (mg·kg-1) | 0.06 | 22.5 | 0.62 | 3.04 | 4.9 | 0.065 | 0.05 | 9.52 | Mn (mg·kg-1) | 71.6 | 966.5 | 292.43 | 218.97 | 0.75 | 583 | 774.6 | 0.5 | Ni (mg·kg-1) | 15.5 | 64 | 30.3 | 11.98 | 0.4 | 26.9 | 47 | 1.13 | Pb (mg·kg-1) | 19.6 | 74.3 | 32.05 | 11.84 | 0.37 | 26 | 17 | 1.23 | Se (mg·kg-1) | 0.22 | 1.53 | 0.61 | 0.28 | 0.47 | 0.29 | 0.09 | 2.09 | Zn (mg·kg-1) | 58.4 | 250.8 | 112.51 | 49.66 | 0.44 | 74.2 | 67 | 1.52 | 有机质 (%) | 2.54 | 6.95 | 4.71 | 1.03 | 0.22 | 3.1 | | | pH | 5.2 | 8.02 | 6.66 | 0.96 | 0.14 | 6.7 | | | CEC (cmol(+)/kg) | 5.47 | 16.48 | 11.04 | 2.56 | 0.23 | | | | CaCl2?Cd (mg·kg-1) | 0 | 0.38 | 0.04 | 0.06 | 1.63 | | | | EDTA?Cd (mg·kg-1) | 0.08 | 3.21 | 0.84 | 0.81 | 0.95 | | | |
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