基于GIS的新疆新和县耕地地力等级评价研究

以新疆新和县为例,利用测土配方施肥项目所取得的基础数据,筛选了有机质、速效钾、有效磷、有效锌、电导率和pH值等可量化的指标作为评价指标,根据模糊数学理论和特尔斐法建立评价因子的隶属函数模型,利用层次分析法建立评价因子的层次分析模型。以ArcGIS地统计分析模块和空间分析模块为平台,应用克里金插值获取各评价因子的评价信息,根据加法模型以栅格形式计算出耕地地力综合指数,划分耕地地力等级。由评价结果可以看出,将本研究的评价方法和GIS技术相结合运用到耕地地力评价是一个切实可行的方法。

A Study on the Evaluation of Grade of Soil Fertility of Cultivated Land Based on GIS in Xinhe County of Xinjiang

Taking Xinhe county of Xinjiang as an example,some quantifiable indices including organic matter,available potassium,effective phosphorus,effective zinc,conductivity and pH value have been screened as evaluation indices,the basic data were obtained on the basis of fertilization project with soil detection.The model of membership function concerning evaluation factor was formed according to theory of fuzzy mathematics and Telphi Principle.The model of analysis hierarchical process about evaluation factor was also formed by using hierarchical analysis method.The evaluating information about different evaluation factors were abtained with Kriging method,by using ArGIS land calculated analytical module and spatial analytical module as a platform.The Integrative indices of cultivated land productivity were calculated on the basis of addition model in grid form to classify the cultivated land productivity grades.The results showed that it was a feasible plan to apply GIS technology combined with our evaluation method to evaluate cultivated land productivity.