苏南经济快速发展区几种土壤重金属有效态含量影响因素--以昆山市为例

Influencing factors of soil available heavy metals in the region with high economy development of south Jiangsu province： A case study of Kunshan city

本文以江苏省昆山市为典型区，探讨了农田土壤有效态铁、锰、铜、锌、铅、镍、镉、钴含量的影响因素。回归分析结果表明，pH值封土壤有效态Fe、Mn、Ni、Co含量影响最大，达极显着负相关水平，是最主要的影响因素；pH、有机质含量对土壤有效态Pb含量影响相对更为重要；土壤全Cu、全Cd含量分别是影响有效态Cu、Cd含量的最主要因素，其中，〈0．01mm黏粒含量也是影响有效态Cu含量的重要因素。全Zn是影响有效态Zn含量的相对重要的因素。

Influencing factors of soil available Fe, Mn, Cu, Zn, Pb, Ni, Cd and Co in Kunshan city of Jiangsu province was discussed. The regression analysis shows pH is the most important factor for available Fe, Mn, Ni, Co, and they are significantly negative correlated with soil pH. Soil pH and content of organism are relatively important factors for soil available Pb, soil total Cu was the most important factor for soil available Cu, so does Cd, and content of less 0.01 mm clay was also important for soil available Cu. Content of soil total Zn was relatively important for soil available Zn.