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运用常规统计学和典范对应分析方法,对干旱区盐渍土土壤全盐量(TS)、盐分离子组成、碱化度(ESP)、pH、电导率(EC)的空间分布特征进行了分析。结果表明,该区土壤为重度至轻度盐化,不同层次土壤中,Na+与Cl-、Ca2+与Mg2+保持较好的关联性。TS的空间分布,在0～50 cm全剖面上主要受控于Cl-、HCO3-和Na+离子;分层与全剖面的情况略有不同,Cl-、Na+在各个土层仍为主要控制离子。ESP在全剖面上其空间分布受环境因子的影响较小,0～10 cm土层主要受Na+与Cl-离子的制约;10～30 cm土层内主要受HCO3-离子的制约;30～50 cm土层未表现控制因子。pH在全剖面上受盐分离子的影响较小,分布较为均匀,表层受离子影响很小,在10～30 cm、30～50 cm土层内受HCO3-离子的影响微弱。EC在全剖面上的空间分布受控于Ca2+、Mg2+离子,30～50 cm土层主要受K+离子的控制,其他土层与全剖面相同。
The spatial distribution characteristics of total salt (TS), salt ion composition, alkalinity (ESP), pH, conductivity (EC) of saline soils in arid area were analyzed by using conventional statistics and canonical correspondence analysis. The results showed that the soils in this area were heavily to mildly salinized, and Na +, Cl-, Ca2 + and Mg2 + remained relatively well in different soil layers. The spatial distribution of TS is mainly controlled by Cl-, HCO3- and Na + ions in the 0-50 cm section. The stratification and total cross section are slightly different. Cl- and Na + are still the main control ions in all soil layers . The spatial distribution of ESP in the whole section is less affected by environmental factors. The 0-10 cm soil layer is mainly controlled by Na + and Cl- ions; the soil layer is mainly controlled by HCO3- ions in 10-30 cm soil layer; cm soil layer did not show the control factor. The pH was less affected by salt ions in the whole section and distributed more evenly. The surface layer was less affected by ions and was less affected by HCO3- ions in the soil layers of 10-30 cm and 30-50 cm. The spatial distribution of EC is controlled by Ca2 + and Mg2 + ions in the whole section. The soil layer at 30-50 cm is mainly controlled by K + ions. The other soil layers are the same with the whole section.