摘要
根据凉山烟区5种类型土壤的9种肥力指标数据,应用主成分分析法对该区的土壤肥力进行了综合评价,得出的3个主成分的累积贡献率为86.96%。3个主成分为养分因子(由有机质、有机总碳、全氮、全磷、碱解氮、速效磷含量组成)、钾因子(由全钾和速效钾含量组成)和pH因子(由pH值组成)。不同类型土壤肥力的综合得分显示为:黄壤>紫色土>红壤>水稻土>黄棕壤。
The principal component analysis in the SPSS statistical software was adopted to conduct a comprehensive evaluation of soil fertility according to 9 fertility indicators of 5 soil types in Liangshan tobacco growing areas. The cumulative contribution rate of three main components was 86.96%. The original indicators information could be explained basically by these three main compo- nents. The three main components were： （~） soil organic matter, organic total carbon, total nitrogen, total phosphorus, available ni- trogen, available phosphorus content; .total potassium and available potassium content; pH -value. The integrated fertility score of various soil types showed the following order： yellow soil 〉 purple soil 〉 red soil 〉 paddy soil 〉 yellow brown soil.
出处
《江西农业学报》
CAS
2013年第1期60-62,共3页
Acta Agriculturae Jiangxi
基金
四川省烟草专卖局资助项目
关键词
凉山
烤烟
主成分分析
土壤肥力
综合评价
Liangshan
Flue - cured tobacco
Principal component analysis
Soil fertility
Comprehensive evaluation
