土壤学报2012，Vol.49Issue(4)：681-687,7.
基于典范对应分析的干旱区春季盐渍化特征研究
CHARACTERIZATION OF SOIL SALINIZATION IN ARID AREA BASED ON CANONICAL CORRESPONDENCE ANALYSIS
摘要
Abstract
Analysis of characteristics of spatial distributions of total salt content (TS) , ion composition, exchangeable sodium percentage (ESP) , pH value and electrical conductivity (EC) of salt-affected soils in the Arid Area was conducted , using conventional statistics and canonical correspondence analysis. Results show that ( 1) the soils in the region are heavily to slightly alkalized, e. g. heavy in topsoil ( 0 ~ 10 cm ) and slight in bottom ( 30 ~50 cm ) ; (2) close correlation exists between Na+ and Cl- , and between Ca+and Mg2+ in all soil layers; (3) Cl- , HC03-and Na+ are the main factors controlling spatial distribution of soil total salt throughout the whole profile (0-50 cm ) , which though varies slightly from layer to layer, where Na+ and Cl- remain to main factors; (4) the spatial distribution of ESP in the profile is less affected by environmental factors, however, it is restricted mainly by Na+ and Cl- in the 0 ~ 10cm soil layer, by HCO3- in the 10 ~ 30 cm soil layer, and by none in the 30 ~ 50 cm soil layer; (5) pH is quite evenly distributed throughout the profile and only slightly affected by salt ions, that is, it is very slightly affected by ions in the 0 ~ 10 cm soil layer, and only weakly influenced by HCO3- in the10~ 30 cm and 30 ~ 50 cm soil layers; (6) the spatial distribution of EC is controlled by Ca 2+ and Mg2+ throughout the whole profile, except in the 30 ~ 50 cm soil layer where K+ is the dominant controlling factor.关键词
盐渍土/盐分分布/典范对应分析/干旱区Key words
Salt affected soil/ Salt distribution/ Canonical correspondence analysis/ Arid area分类
农业科技引用本文复制引用
韩桂红,塔西甫拉提·特依拜,买买提沙吾提,张飞..基于典范对应分析的干旱区春季盐渍化特征研究[J].土壤学报,2012,49(4):681-687,7.基金项目
国家自然科学基金项目(40961025,40901163,U1138303/L08)、资源与环境信息系统国家重点实验室开放基金(2010kf0003sa)和新疆维吾尔自治区高校青年教师科研培育基金项目(XJEDU2011S07)资助 （40961025,40901163,U1138303/L08）
