摘要
运用主成分分析和聚类分析方法对重庆市黄壤养分特性进行了分析。结果表明:重庆市山地黄壤的90个样品的19个指标主成分分析得出6种主要因子,其贡献率分别是22.68%、19.55%、13.95%、11.36%、9.20%和7.96%,累计贡献率达到84.34%,运用系统聚类的方法将重庆市黄壤划分为3种养分类型:类I为低N低有机质土壤;类II为高肥力土壤类型;类Ⅲ为中等肥力土壤类型。其中,I类是重庆黄壤的主要土壤养分类型,所划分的养分类型能反映所研究区县黄壤的养分特征。
The mountain country yellow nutrient characteristics in Chongqing based on the method of principle component analysis and cluster analysis was analysed. The result indicated,through the principal component analysis of the 19 indexes in the 90 mountain yellow soil samples in Chongqing,6 major factors were induced. Theirs contribution rates respectively were 22.68 % ,19.55 % ,13.95 % ,11.36 % ,9.20 % and 7.96 %, and cumulative contribution rate achieved to $4.34 %. Based on duster analysis,the mountain yellow soil in Chongqing was compartmentalized to 3 nutrient types ：Ⅰ type was high nitrogen and lack of phosphorus. Ⅱ type was high fertility soil. Ⅲ type was middling fertility soil. Thereinto,I type was the main soil nutrient type. The dividing nutrient type ould reflect the nutrient characteristics in every district.
出处
《西南农业学报》
CSCD
2008年第2期376-379,共4页
Southwest China Journal of Agricultural Sciences
基金
重庆市科委项目(9066)
重庆市教委项目(KJ060306)
关键词
重庆
黄壤
养分
主成分分析
聚类分析
Chongqing
yellow soil
nutrient
principal component analysis
cluster analysis
