Research on Soil Heavy Metal Contents and Speciation Distribution Characteristics Under Different Cultivation Patterns
The contents and pollution evaluations of soil heavy metals under different cultivation patterns (rice fallow,rice-wheat cultivation rotation,poplar,cotton and soybean) in coal reclaimed area of Xuzhou were analyzed.Speciation distribution characteristics were determined by five steps of sequential extraction Tessier methods and pollution levels were conducted by using Nemerow Pollution Index and Geoaccumulation Pollution Index.The results showed that:the average contents of heavy metal were lower than the environmental quality secondary standard for soils,but compared with background values,Pb under four cultivation patterns and Cu under cotton and soybean pattern had a partial moderate pollution.Pb pollution under rice fallow,rice-wheat cultivation rotation and Cr,Cu,Ni,Pb should be paid attention to.The order of Nemerow comprehensive pollution index was poplar ＞ rice fallow ＞ cotton and soybean ＞ rice-wheat cultivation rotation,showing light pollution.
coal reclaimed areadifferent cultivation patternssoil heavy metalspollution evaluation
NETL
NSTL
万方数据
维普
