南京菜地土壤中铅的形态及其含量相关性研究

以南京市郊菜区铅元素起背景值的土壤样品为对象，研究其中铅的存在形态、各态分量以及与总铅量、土壤酸碱度、有机质含量、阳离子代换量间的关系。结果表明，交换态量1．61～6．4mg／kg、碳酸盐结合态量0．10～3．20mg／kg、铁锰氧化物结合态量3．01～10．52mg／kg、有机质硫化物结合态量3．60～10．24mg／kg、残渣态量7．58～19．36mg／kg。交换态量与总铅量间有显著的正相关关系，碳酸盐态相对量（占全量百分数）与土壤酸碱度间有显著的负相关关系，铁锰氧化物态相对量与土壤酸碱度间有极显著的正相关关系。

On Relationships between Form of Lead (Pb) in Vegetable Plots Soil and its Content in Suburbs of Nanjing

Based on the experiment of lead(Pb) forms examined with the soil samples above the natural background, this paper describes the forms of Pb in vegetable plots soil and content of each form and its relationship with gross Pb content, PH, organic matter, exchange amount of positive ion. The result shows that there is evident positive interrelation between gross Pb content and exchangable form content, and there is evident negative interrelation between PB-carbonate content and PH value of soil which is positively interelated with the content of FeMn oxide.