摘要
运用主成分分析选取土壤肥力变异因子。三个主成分的累积贡献率达85.21％,分别命名为:有机质因子、酸碱度因子、质地因子。将各样品的主成分因子得分作为自变量,土壤微量元素含量作为因变量,进行逐步回归分析,得到回归方程。根据方程的回归系数大小可以评价各肥力变异因子对土壤微量元素累积和迁移的作用大小。
Principal component analysis was used to derive soil fertility variation factors.The accumulate distribute of three principal component reached 85,21%, which were named as organic matter factor; acidity factor; texture factor. Using the scorces of the principal component factors of the samples as independent variables, the content of soil trace elements as dependent variable, stepwise regression analysis was performed to obtain a regression function. According to the corefficient of the function, the magnitude of the stationed soil fertility variation factors affect the accumulation and movement of the soil trace elements.
出处
《重庆环境科学》
1993年第5期21-24,共4页
Chongqing Environmental Science
关键词
土壤
微量元素
肥力
回归分析技术
植物
测定方法
Trace elements Fertility variation Principal component analysis Regression analysis
