Spatial distribution of Cd, Pb, as contents in the farmland black soil in Jilin Province
吉林省农田黑土中Cd、Pb、As含量的空间分布特征

Spatial distribution and pattern of Cadmium(Cd),Lead(Pb) and Arsenic(As) contents in the farmland black soil in Jilin Province were analyzed using geostatistics methods.Result of semivariance fitness models showed that Pb content in soil was auto-correlated to a moderate degree while contents of Cd and As were autocorrelated to a low degree,respectively.Based on the results of semivariance analyses,distribution maps were generated using Kriging interpolation.The result showed that heavily Cd-contaminated site occurred mainly around the mine area, and the accumulation area for Pb appeared mostly in the suburb and roadsides,while in farmland of suburb and vicinity of coal mine the As content was higher.