长武县苹果园土壤重金属含量及其评价

Evaluation of heavy metal contents of apple orchard soil in Changwu county

依据无公害果园土壤环境质量标准和绿色食品产地土壤环境质量标准,对陕西长武县苹果园地土壤环境质量进行了评价.结果表明:以无公害果园土壤环境质量为评价标准,长武县果园土壤重金属污染程度呈现Ni>As>Cr>Zn>Cu>Pb的特征,土壤重金属综合污染指数小于0.7;以绿色食品产地土壤环境质量为评价标准,长武县果园土壤重金属污染程度有Cr>As>Pb>Cu的特征,土壤重金属综合污染指数小于0.7.评价表明,长武县苹果园土壤环境质量为清洁.

According to the soil environmental quality standard in the producing area of the nuisance free fruits orchard and the green food, the soil environment quality of apple orchard in Changwu county, Shaanxi province is evaluated. The results indicated that the contaminated degree of soil heavy metals has the feature of Ni〉As〉Cr〉Zn〉Cu〉Pb, the synthetic pollution index of soil heavy metals was less 0.7 according to the standard of soil for the nuisance free fruits. The contaminated degree of soil heavy metals has the feature of Cr〉As〉Pb〉Cu, the synthetic pollution index of soil heavy metals was less 0.7 according to the standard of soil for the green food. In general, the soil environment quality of apple orchard in Changwu county is clean.