遵义东南部地区农业土壤重金属污染生态风险预警研究

为了评估和分析遵义东南部地区农业土壤的重金属污染生态风险状况，采用生态风险预警评估法分别计算了该地区农业土壤中重金属cd、Pb、cr、Hg、As的生态风险预警指数，评估了该地区耕作区土壤重金属生态风险预警级别，得出了该区土壤的重金属污染生态风险预警状况。结果表明，该地区生态环境仅受到Cd元素一定的污染和扰动，Pb、Cr、Hg、As的预警级别是无警。总体评估遵义东南部地区生态风险指数均小于零，属于无警级别。

Ecological Risk Warning Assessment on Heavy Metals Pollution of the Agricul- tural Soil in Southeast Area of Zunyi

In order to evaluate heavy metals pollution of the agricultural soil in southeast area of Zunyi, the index of Cd, Pb, Cr, Hg and As were calculated by the method of ecological risk warning assessment. The ecological risk warning levels of heavy metals pollution of the agricultural soil in the area were evaluated to know the risk situation. The results showed that ecological environment was only polluted by Cd. There was no warning of Pb, Cr, Hg and As pollution. Generally, the index of ecological risk warning assessment in this area was below zero, which indica- ted a negative warning level.