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1、基于GIS的云南省励海县耕地地力评价与分摘要:以云南渤海县为研究对象,以ArcGIS软件为平台,以DEM分析、栅格计算和空间插值等空间分析技术为核心,结合德尔菲法、层次分析法、模糊隶属度函数和耕地生产性能综合指数(IFI)等方法,确立该县耕地地力的主要影响因子及其权重,建立综合评价体系及其空间计算模型,并对综合评价结果做出分析。研究结果表明,砌海县51575.73hm2的耕地分为6个等级,一至六级耕地分别占总耕地的14.12%、27.40%、20.17%、17.23%、12.70%、8.38%。劭海县三级以上高质量耕地占
2、60%以上,耕地地力总体情况良好,大力提升三级及其以下耕地的耕作能力是改善本地区耕地质量的主要途径。关键词:耕地地力;耕地生产性能综合指数;模糊隶属度函数;地理信息系统中图分类号:F301.24;S153.6文献标识码:A文章编号:0439-8114(2014)12-2788-06GIS-BasedEvaluationforFarmlandFertilityofMenghaiCountyinYunnanProvinceXUQuan-lil,2a,YANGKun2b,YIJun-hua3(1.SchoolofRemoteS
3、ensingInformationEngineering,WuhanUniversity,Wuhan430072,China;2a.FacultyofTourismandGeographicScience;b.SchoolofInformationScience,YunnanNormalUniversity,Kunming650500,China;3.InspectionStationofSurveyingandMappingProductinYunnanprovince,Kunming650034,China)Abst
4、ract:ToevaluatethefarmlandfertilityofMenghaiCountyinYunnanprovince,theArcGISsoftwarewasusedtomadeDEManalysis,rastercalculationandspatialinterpolationofspatialanalysistechnology.MenghaiCountywasselectedasthestudyareatoestablishmajorfactorsofinfluenceandtheirweight
5、sforthefarmlandlandproductivity.TobuiltacomprehensiveevaluationsystemandspatialcomputingmodelwithDelphimethod,analytichierarchyprocess(AHP),fuzzymembershipfunction,farmlandintegratedfertilityindex(IFI)andothermethodswereused.Spatialdistribution,areastatisticsandf
6、armlandnutrientanalysisfortheevaluatingresultswereanalyzed.TheresuItsshowedthat51575・73hectaresofcultivatedlandinMenghaiCountywasdividedinto6grades.ThepercentagesoftotalfarmlandfromGrade1toGrade6landwere14.12%,27.40%,20.17%,17.23%,12.70%and8.38%,respectively.GISm
7、ethodcouldsatisfytherequirementsforquantifyingandautomatingfarmlandfert订ityevaluation.ThecultivatedlandoverGrade3occupiedmorethan60%oftotalland.TheoverallsituationofcultivatedlandfertilityinMenghaiCountywasgood.Thegovernmentshouldadjustmeasurestomaintaintheexisti
8、ngqualityofcultivatedlandresources,andtoenhancethefarmingabilityofcultivatedlandworsethanGrade3.Keywords:farmlandfertility;farmlandintegratedfertilityindex;fuz