摘要:以艾比湖流域风沙土土壤为研究对象，对不同植被类型覆盖条件下土壤总盐含量、可溶性离子等指标进行测定，通过相关性分析以及主成分分析，确定土壤盐分特征。结果表明：研究区不同植被覆盖下的风沙土土壤盐分含量较高，差异较大，总盐含量呈现强烈的空间变异特征；土壤中总盐含量与Cl^-、K⁺+Na⁺及SO₄^2-含量之间存在极显著的正相关关系，总盐含量与HCO₃^-的相关性最弱；土壤中阴离子以Cl^-，SO₄^2-为主，阳离子以K⁺+Na⁺为主，据主成分分析结果将其确定为盐渍化的特征因子。研究区风沙土盐渍化类型以氯化物-硫酸盐型和硫酸盐型为主，判断该区域风沙土的盐渍化类型为盐土。

关键词:艾比湖  土壤盐分  相关性  主成分分析

AbstractUsing the sandy soil from Ebinur Lake basin as study object, the contents of soil total salt and soluble ions under different conditions of vegetation coverage were measured, and the characteristics of soil salinity were evaluated by the methods of correlation analysis and principal component analysis. The results showed that the total salt content of sandy soil was high and quite different among sampling areas, so it showed an extremely strong spatial variability. The total salt content was positively correlated with the contents of Cl^-, K⁺+Na⁺ and SO₄^2- at extremely significant level, but it was less correlated with the content of HCO₃^-. The main anions in sandy soil were Cl^- and SO₄^2- and the main cations were K⁺+Na⁺, so they were judged to be the characteristic factors of salinization according to principal component analysis. The salinization types of sandy soil were mainly chloridesulfate type and sulfate type.

Key wordsEbinur Lake  soil salinity  correlation analysis  principal component analysis

文章编号： 0258_7106 (2016) 01_0018_15 中图分类号： P618.41 文献标志码：A

改回日期：2015_07_11

基金项目

**通讯作者耿新霞， 女， 1979年生， 助理研究员， 成矿规律研究方向。 Email： gen gxinxia@cags.ac.cn