中文摘要：

通过对金华市59个表层土壤（0～20 cm）土样磁化率和重金属含量的测定,以土壤磁化率和频率磁化率为自变量,Pb含量为因变量对土壤进行趋势面分析。结果表明：金华市土壤Pb含量总体低于背景值,未见Pb明显污染,磁化率相对较低,频率磁化率相对较高,这同很多一级大城市相比存在显著差异;土壤磁化率、土壤频率磁化率和Pb含量分别成非线性关系,这与其他地区的线性相关的研究结果不一致;金华市的土壤磁化率对Pb含量的指示作用只能用磁化率和频率磁化率的范围组合来判断,而不是用单一的线性关系来概括。

英文摘要：

Based on the analysis results of soil magnetic susceptibility and heavy metal content in 59 urban topsoil（0～20 cm） samples in Jinhua city,the method of trend surface analysis was conducted to the soil samples by using soil magnetic susceptibility and frequency magnetic susceptibility as the independent variable and Pb content as the dependent variable.The results revealed that the Pb content in soil of Jinhua city is generally lower than the average rate,so the soil are scarcely polluted.The magnetic susceptibility is relatively low and the frequency magnetic susceptibility is relatively high.All these are different from many big cities.There is nonlinear relation between the magnetic susceptibility and the Pb content,as well as between soil frequency magnetic susceptibility and Pb content,which is different from the results of the linear correlation in other areas.The indication of soil magnetic susceptibility to the Pb content in Jinhua city can only be used to judge by the combination of magnetic susceptibility and frequency magnetic susceptibility rather than to summarize by a simple linearity.