济南市土壤地球化学背景值及环境质量评价

Soil Geochemical Background Value and Environmental Quality Assessment in Ji'nan City

以山东省1∶25万多目标区域地球化学调查数据为依据,研究了济南市54项指标的土壤地球化学背景值与全省和全国土壤的差异以及土壤质量地球化学综合等级。研究发现,济南市土壤中的C和CaO含量明显高于山东省土壤背景值,Cd、Cr、Cu、F、Ni、Sn、MgO、CaO、Na_(2)O、pH值高于全国土壤A层丰度值,Se、I、OrgC等植物生长所需的营养指标含量低于全国背景值。济南市土壤质量总体较好,优质、良好和中等之和占研究区总面积的99.76%,差等土壤分布面积最少,仅占0.24%,零星分布在济南城区、莱芜区、钢城区和章丘区工矿企业附近,与人类活动密切相关。

Based on geochemical survey data of target regions with the scale of 1∶250000 in Shandong province,the differences between soil geochemical background values of 54 indexes in Ji'nan city and the soils in our country and the comprehensive geochemical grade of soil quality have been studied.It is found that the contents of C and CaO in the soil of Ji'nan are significantly higher than the soil background value in Shandong province.The values of Cd,Cr,Cu,F,Ni,Sn,MgO,CaO,Na_(2)O and pH are higher than the abundance value of soil layer A in China,and the contents of nutritional indexes required for plant growth,such as Se,I and OrgC are lower than national background value.The soil quality in Ji'nan city is generally good.The sum of high quality,good quality and medium quality accounts for 99.76%of the total area in the study area,and the poor quality soil distribution area is the least,and accouns for only 0.24%.It is sporadically distributed near industrial and mining enterprises in Ji'nan city,Laiwu district,Gangcheng district and Zhangqiu district,which is closely related to human activities.