土壤小麦根系系统重金属迁移控制因子的辩识研究

相关与回归分析发现，大田条件下土壤理化性质与共存元素同小麦根系重金属含量间存在密切关系；多元与逐步回归数学模型均达到显著水平，但逐步回归分析显示对重金属迁移起主导作用的不是所选全部控制因子。非必需元素Cd、Pd主要取决于同种元素在土壤中的含量；而必需元素Cu、Zn则受同种元素在土壤中含量的影响相对较小。控制因子的辨识，无疑有利于制定合理的土壤修复及环境管理方案。

Study on discrimination of transfer control variables for heavy metals in soil-root system

Some findings were reached with the correlative and regressive analyses. Most of soil properties and co-exist elements had significant correlation with heavy metal contents in spring wheat root under the field conditions. Although the models of the multiple and stepwise regressions got the significant levels, the equation of stepwise regression did not include all independent variables that the equation of multiple regression had. The root absorption of unessential elements (Cd and Pb) maily depended on the concentrations of the same element in soil, but the root absorption of essential elements (Cu and Zn) did not. The discrimination of independent variables was undoubtedly beneficial to draft the scheme of soil remedy and environmental management.;