Abstract：
To study the sources and potential risks of heavy metals in soils of characteristic agricultural product producing areas is of great significance for the scientific management and safe utilization of soil and crop resources. The contents of heavy metals As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in the 254 surface soil samples collected from the Heze oil peony planting area were determined. The content characteristics and correlation of heavy metals were analyzed using multivariate statistical methods. The sources of heavy metals in topsoil were analyzed using Igeo, PMF, and PCA/APCS. The ecological risks of the eight heavy metals were assessed through the potential ecological risk index (PERI). The results showed that the average contents of seven heavy metals in the soil were basically consistent with the background values of soil elements in Heze City, except that the average value of Cd was 1.44 times higher than the background value in Heze City. Correlation analysis and cluster analysis revealed that Pb, Hg, and Cd elements in the soil were greatly affected by human activities in the later period. The sources of eight heavy metals in the study area were natural sources, agricultural fertilizer sources, industrial coal sources, and domestic transportation sources, with the contribution rates of 81.31%, 15.45%, 2.74%, and 0.50%, respectively; 84.25% of the sites in the study area were at slight ecological risk, whereas the moderate risk and strong risk sites accounted for 14.96% and 0.79%, respectively. Among them, Cd and Hg were the dominant elements of ecological risk in the study area.
摘要：
研究特色农产品产区土壤重金属的来源和潜在风险,对于土壤和作物资源的科学管理和安全利用具有重要意义。重金属As的含量，Cd,Cr,Cu,Hg,Ni,Pb,对菏泽油用牡丹种植区采集的254份表层土壤样品中的锌和锌进行了测定。采用多元统计方法对重金属含量特征及相关性进行分析。使用Igeo分析了表层土壤中重金属的来源，PMF,PCA/APCS。通过潜在生态风险指数(PERI)对8种重金属的生态风险进行评估。结果表明,菏泽市土壤中7种重金属的平均含量与土壤元素背景值基本一致,除了Cd的平均值比菏泽市背景值高1.44倍。相关分析和聚类分析表明,Hg,后期土壤中Cd元素受人类活动影响较大。研究区8种重金属的来源均为天然来源,农业肥料来源，工业煤源，和国内交通来源，贡献率为81.31%，15.45%，2.74%,和0.50%，分别；研究区84.25%的站点存在轻微生态风险，而中等风险和强风险场所占14.96%和0.79%，分别。其中,Cd和Hg是研究区生态风险的主导元素。
