沈阳农业用地土壤重金属含量及有效性研究

Research on the Heavy Metal Content and Availability of Farmland Soils in Shenyang

以沈阳市农业用地为研究区域,对土壤重金属(As、Pb、Cu、Cr、Zn、Ni、Cd)的全量及有效含量进行分析评价。结果表明,土壤受到重金属不同程度的污染,依次是:Pb>Zn>Cu>As>Ni>Cd>Cr,Pb污染较严重,其主要污染影响因素为交通运输。重金属全量与有效态含量基本正相关,有效系数大小依次为:Cd>Pb>Cu>Zn>Ni>As>Cr,有效态重金属在土壤剖面上呈递减趋势,主要富集在土壤表层。

The amount of heavy metals as well as the availability was used to evaluate the content of the pollution of the farmland soil in Shenyang.The results indicates： The order of farmland soil polluted in different degrees is Pb Zn Cu As Ni Cd Cr,with a serious Pb pollution and the main pollution factors for transportation.Total content is positive related to the availability,with an order of Cd Pb Cu Zn Ni As Cr.the contents of availability heavy metals in soil profile are of degressive trend,which mainly enriched in the surface soil.