基于GIS与关联分析的土壤肥力评价

Soil fertility evaluation based on geographic information system and gray relative analysis

以广东省东莞赤红壤农业现代化实验区为例 ,应用ArcInfo进行空间数据采取、处理与分析 ,采用叠置分析的方法 ,以评价因素的组合确定评价单元 ;采用层次分析法确定评价因素的权重 ;构造灰关联综合评价模型 ,计算各单元的灰关联综合评价值 ,得出各单元按肥力从劣到优排列的序列 ,根据灰关联综合评价值的大小划分土壤肥力等级并分级统计其面积。图 1,表 3,参 5。

Taken Dongwan Agricultural Modernization Experimental Field for Red Soil Areas as the research site, soil fertility evaluation based on the technique of Geographic Information System and mathematic models was discussed. ArcInfo was adopted to spatial data collection, processing and analysis, overlay analysis was used to determine evaluation unit by combination of evaluation factors, AHP was applied to judge the weight of each evaluation factor, gray relative comprehension evaluation model was given, value of gray relative comprehensive evaluation of all samples was calculated and the order of samples on soil quality was given, soil fertility was grading according to the result of gray relative comprehension evaluation.