土地环境质量综合评价模型的建立--以山东半岛蓝色经济区为例

依据多目标区域地球化学调查资料，对土地环境质量综合评价方法进行探讨，建立评价模型。提出土地环境质量综合评价是土壤内部指标分等、外部指标定级，整合全部评价因素的新观点。采用相关系数、半方差函数进行指标筛选，层次分析法确定参评指标权重，通过隶属度函数模型将土壤不同含量单位的指标纳入同一评价体系形成内部因素，叠加区域地下水、农作物质量等外部因素，建立土地质量综合评价模型。根据模型对山东半岛蓝色经济区土地环境质量进行综合评价，结果表明：山东半岛土地可分为优质、优良、良好、中、差5等20级，其中可作绿色（111和121级）及无公害（211和221级）食品生产基地的土地占62．60％；需农业种植结构调整的512和522级土地面积267．54 km2，多位于矿区（金矿、石墨矿、铜铁矿）周边或紧邻城镇地带。土地环境质量综合评价方法及模型的建立对山东其他地区基本农田保护和土地质量等级划分具有一定借鉴意义。

Establishment of Comprehensive Evaluation of Land Environmental Quality Model --Setting Blue Economic Zone of Shandong Peninsula as an Example

Based on multi purpose regional geochemical survey data,comprehensive evaluation method of land environment quality has been studied,and comprehensive evaluation model has been established.A new idea were first proposed that land environment quality comprehensive evaluation is soil internal classi-fication,external indicators grading and integrating all the evaluation factors.By using correlation coeffi-cient,semivariance function index selection,analytic hierarchy process （ahp）to determine the contestant indexes weights,the membership function model is set up to different content units indicators into the same evaluation system,overlaying regional groundwater and crop quality of external factors,land quality evaluation model is established.According to the established model to comprehensive evaluating the Jia-odong peninsula land environment quality,the results show that the Jiaodong peninsula land can be divided into high quality,excellent,good,intermediate ,poor ,5 ,etc.,which can be made the green level （1 1 1 and 121）and free （211 and 221）food production base of land accounted for 62.60%;needing agricultural planting structure adjustment of 512 and 522 level land area is 267.54 km2,which are more than around all kinds of mining area （gold,graphite ore,copper ore）or adjacent to the villages and towns.Land environ-ment quality comprehensive evaluation method and model has certain reference significance to Shandong other parts of basic farmland protection and land quality hierarchy.