以甘肃省天祝藏族自治县耕地地力调查数据为基础，在GIS的支持下，采用土壤分布图、农用地地块图、灌溉分区图、地貌类型分区图、行政区划图叠置的方法划分评价单元，系统聚类与Delphi法相结合筛选参评因素，以层次分析法(AHP)确定其权重，模糊评判法确定耕地地力等级等方法，将县域耕地地力划分为5个等级，并针对不同等级耕地的属性特征提出了合理利用和改良建议。

The article is based on the survey data of cultivated land fertility in Tianzhu Tibetan Autonomous County of Gansu Province， using Delphi approach， cluster analysis，analytic hierarchy process(AHP) and fuzzy evaluation based on GIS to establish the combinative method of qualitative and quantitative for evaluating cultivatedland fertility and to provide the scientific basis for management and sustainable utilization of cultivated landresources .The results showed that the fertility of cultivated land could be divided into five grades， and the suggestions torationally utilize and improve cultivated land resources were proposed to analyze the characteristics of thecultivated lands with different fertility and problems in utilization of cultivated land .

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公益行业(农业)专项经费项目“主要农区面源污染监测预警与氮磷投入阀值研究”(201003014)部分内容