摘要
以贵州省赤水市山区耕地地力评价为例,选取了海拔、灌溉能力、剖面构型、耕层厚度、土体厚度、耕层质地、有机质、有效磷、速效钾、耕地坡度级、地形部位共11个评价因子构建指标体系,运用结合特尔斐法的层次分析法和主成分分析法对赤水市耕地地力进行评价,在此基础上运用相关分析法对两种评价方法进行对比分析。结果表明,在山区耕地地力评价中,对于同一评价单元,采用层次分析法得出的分值与按照主成分分析法得出的分值存在很强的相关性,但也表现出一定的差异性。
Taking the cultivated land fertility evaluation in mountainous area in Chishui City,Guizhou Province for example,11 factors containing altitude,irrigation capacity,profile pattern,topsoil thickness,soil thickness,topsoil texture,organic matter,available phosphate,available potassium,cultivated land gradient and topographic position were selected to establish evaluation index system. Analytic hierarchy process（ AHP）and principal component analysis（ PCA） based on Delphi method were used to evaluate the cultivated land fertility in Chishui City and compared by correlation analysis. The results showed that in the cultivated land fertility evaluation in mountainous area,for the same evaluation unit,there was a strong correlation but certain differences between the scores calculated by PAC and AHP.
出处
《山东农业科学》
2013年第11期91-94,共4页
Shandong Agricultural Sciences
基金
贵州省土地整理中心资助项目"贵州省土地整治项目耕地质量等级评定"(H130029)
农业部
财政部测土配方施肥资金补贴项目"贵州省赤水市耕地地力评价"(H120028)
关键词
耕地
地力评价
主成分分析(PCA)
层次分析法(AHP)
相关分析
Cultivated land
Fertility evaluation
Principal component analysis（PCA）
Analytic hierarchy process（AHP）
Correlation analysis
