苎溪河流域土壤中污染物的分析

Analysis of the contaminants in soil of Zhuxi River Region

以苎溪河流域土壤为研究对象,对该地区的土壤中重金属(铅、镉、铜、锌)以及肥力指标(氮、磷、钾)进行了分析,通过相关分析表明,苎溪河流域土壤的重金属含量处于较低的水平,重金属的含量基本到达Ⅱ类土壤的环境质量要求,土壤质量对植物和环境不造成危害和污染,因此苎溪河流域土壤中的重金属对农业面源污染目前还未形成污染;土壤中全氮、全磷、全钾、速效氮、钾、磷含量较低,说明土壤的肥力较差,水土流失较为严重,是造成农业面源污染的重要原因之一.

The content of heavy metals （lead, cadmium, copper, zinc） and fertility indexes （nitrogen, phosphor, potassium） in soil of Zhuxi River Region are analyzed. The results show that the content heavy metals are in the lower level and in Ⅱ standard of soil on the environment quantity request. The heavy metals of Zhuxi River Region in soil do not endanger and pollute the plant and environment. So they on agricultural non-point source pollution have not become pollution. The content of all nitrogen, phosphor, potassium and the effect nitrogen, phosphor, potassium in soil are in the lower level. The results show that fertility of soil is worse. The soil erosion is more serious. It is one of the important reasons producing agricultural non-point source pollution.