山东省章丘市土地质量地球化学评估

Land Quality Geochemical Assessment in Zhangqiu Area,Shandong Province

以章丘市表层土壤调查地球化学数据为基础,查明土壤中元素含量分布及空间变异特征,进行土壤营养元素和环境健康元素分级评价。在此基础上,筛选出必需大量元素、微量元素、有益元素及环境健康元素等评价指标;并权重赋值,建立土地质量地球化学评估指标体系,划分土地质量等级。结果表明:研究区土地质量优良以上等级占全区面积的89.99%,良好级土地占5.39%,中等土地占1.26%,差等土地占3.36%。

Based on the geochemical date of surface soil survey in Zhangqiu area,the content distribution and spatial variability of elements in soil are found out,carried out grading evaluation of soil fertility indicators and environmental elements. Furthermore,the indicators of geochemical assessment is screened out and assigned weight to build geochemical assessment system of land quality,such as necessary major elements,trace elements,beneficial elements and environmental healthy elements. Finally,comprehensive classification of land quality is divided. The result showed that the area above superior grade of land quality accounted for 89. 99% of the total,the fine,medium and poor land possessed 5. 39%,1. 26%,3. 36% respectively.