石家庄污灌区土壤质量综合评价

Evaluation of Soil Quality in Sewage Irrigation Region of Shijiazhuang City

通过对石家庄污灌区土壤评价指标的综合分析,确定了石家庄污灌区土壤质量的评价指标为碱解氮、有效硼、有效钼、Co,Cd,I。利用层次分析法和模糊评判法相结合的手段,在确定石家庄污灌区土壤质量评价指标权重和隶属度函数模型的基础上,对石家庄污灌区的土壤质量进行综合评价。结果显示:该研究区土壤整体处于良好状态,优质土壤、优良土壤、一般土壤、较差土壤面积分别占研究区总面积的24.60%,40.98%,18.03%,16.39%。影响土壤质量的因素主要是污水灌溉方式,其次为土壤质地和元素间的相互作用。通过对石家庄污灌区表层土壤质量的综合评价,客观地分析了土壤的养分水平,正确的定位了土壤的肥力水平和环境质量状况,为当地今后的农业规划、环境污染治理提供了科学的地球化学资料和依据。

Based on the synthetic analysis of the evaluating indicators on soil of the sewage irrigation area in Shijiazhuang,this study confirms that evaluating indicators on the soil quality in this area are the available nitrogen,effective boron,molybdenum and effective,Co,Cd,I.And it combines analytic hierarchy process and fuzzy judgment method to analyze the soil quality of sewage irrigation area in Shijiazhuang,which are based on the confirmation of two factors：evaluating indicators weight on the soil quality of sewage irrigation area in Shijiazhuang and the membership function model.The results show that the soil quality of this study area is in good condition on the whole.The high-quality soil,the good soil,the general soil and the poor soil area accounts respectively for 24.6%,40.98%,18.03% and 16.39% of the total area.The factors which affect the quality of soil are firstly the method of sewage irrigation,secondly the character of soil and the interaction of elements.The assessment of the quality of soil has objectively analyzed the level of nutrients of soil,correctly positioned the level of fertility and the environmental quality of topsoil.All of these provide the scientific geochemical data for the local agricultural plan and the environmental pollution control.