The purpose of this study was to investigate the total and available concentration of Cu, Zn, Pb and Cd in the vegetable soil from typical Karst peri-urban and to analysis the spatial distribution characteristic of heavy metal and to assess their potential ecological risk in Guiyang city, southwest China. The mean value of Cu, Zn, Pb and Cd was higher than their background values of Guizhou topsoil and show a certain accumulation phenomenon. Furthermore, the concentration of available Cu, Zn, Pb and Cd were shown moderate spatial variability and had a complex pollution tendency. Based on semivariance function and Kriging's geostatistics, the total and available Cu, Zn, Pb and Cd were essentially showing the pattern of patch-like distribution and high of heavy metal concentration are mainly distributed in southwest of this area. The potential ecological hazard trend is Cd>Pb>Cu>Zn from the average values of the total and availability of heavy metals. According to the current ecological risk assessment, vegetable soil in the peri-urban of the karst area is subjected to the ecological harm of the Cd and should be paid enough attention.
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