中文摘要：

为了研究关中灌区农田土壤重金属的累积与分布特征,评价土壤污染现状,以蒲城农田土壤为研究对象,按照地理信息要求布点采样,分析了表层土壤中4种重金属的含量,运用单因子污染指数及综合污染指数进行评价。结果表明：Sr、Cu的污染情况较严重,Pb处于轻度污染,Zr的污染程度较低。从综合污染指数来看,研究区内农业土壤重金属处于中度至重度污染水平。从空间分布来看,研究区东北部部分地区污染最严重,其他地区自北向南土壤重金属污染逐渐降低。当地应采取适当措施,加强对该地区污染的防治工作,避免对人体健康造成危害。

英文摘要：

In order to study the soil distribution characteristics of heavy mental in Pucheng, sur- face farmland soils were collected to analyse the： contents of Cu,Pb, Zr and Sr and to evaluate heavy metals pollution levels with the single factor pollution index and comprehensive pollution index. The results showed that St, Cu pollution was serious,Pb pollution was light,Zr was at low- er level of contamination. From the view of comprehensive pollution index, agricultural soil heavy metal pollution was in moderate to serious level in the researched area. From the spatial distribu- tion, the soil heavy metal pollution from north to south was reduced. Thus, appropriate measures should be taken to strengthen the prevention and control of pollution in the region to avoid the harm to human health.