草河口地区土壤中重金属等元素含量的相互关系及其影响因素

STUDY ON CORRELATION BETWEEN SOME METAL ELEMENT CONTENTS IN SOILS OF CAOHEKOU AREA, LIAONING PROVINCE AND THEIR AFFECTING FACTORS

以草河口地区土壤为研究对象，采用相关与回归分析综合地研究了14种元素的含量在土壤中的相互关系及其影响因素，结果表明：地球化学性质相近的元素，它们在土壤中的相关系数大多达到了显著或极显著水平。通过主因子分析，选出四个主因子，它们代表了14个元素测定信息的92％，以第一个主因子、第二个主因子对应的特征向量为横、纵轴将14个元素分成五类；并建立了大多数元素与土壤性质之间的多元回归方程；另外元素的相关性及其与土壤性质的关系也受元素来源与环境外部特征的影响。

The correlation and their concomitant factors between some metal element contents in the soils of Chaohekou Area, Liaoning Province, have been comprehensively studied by correlation and regression analysis. Results show that correlation coefficient for elements more or less similar in geochemical properties attained a significant or a very significant level. Four principal factors were selected by principal factor analysis, they represented 92% of measurement information for 14 elements. Taking the eigenvector corrsponding to the first and the second principal factor as Axis X, Axis Y respectively, the 14 elements were divided into 5 groups,and regression equations were established for most the elements. It is also shown that the accumulation characterisitc of the elements are affected by the source of elements and by external environmental conditions as well.