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

郭超,文宇博,杨忠芳,李伟,管冬兴,季峻峰

Factors controlling the bioavailability of soil cadmium in typical karst areas with high geogenic background

Chao Guo,Yubo Wen,Zhongfang Yang,Wei Li,Dongxing Guan,Junfeng Ji

表2 土壤重金属生物有效性与土壤性质和元素含量的相关系数

Table 2 Correlation coefficients of bioavailable concentrations of heavy metals with soil properties and elements concentrations in soils

Soil?Cd CaCl2?Cd CaCl2提取率 EDTA?Cd EDTA提取率 Na2O -0.373** 0.185 0.368** -0.381** 0.115 MgO 0.116 -0.316 -0.325 0.066 -0.187 Al2O3 -0.043 -0.065 -0.018 -0.080 -0.091 SiO2 -0.711** 0.264 0.364** -0.593** 0.568** K2O -0.599** 0.167 0.344 -0.587** 0.398** CaO 0.833** -0.242 -0.360** 0.722** -0.555** TFe2O3 0.246 -0.237 -0.300 0.177 -0.389** Mn 0.175 -0.258 -0.425** 0.241 -0.034 Cd 1.000 -0.149 -0.393** 0.962** -0.476** Corg 0.327 -0.070 -0.223 0.320 0.041 pH 0.567** -0.581** -0.855** 0.568** -0.274 CEC -0.094 -0.109 -0.117 -0.052 0.227