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运用经典统计学和冗余分析方法,对玛纳斯河流域绿洲土壤全盐量(TS)、pH、电导率(EC)、钠吸附比(SAR)和盐分离子组成的空间分布特征进行了分析。结果表明:土壤全盐量呈现明显的底聚特征,各层土壤全盐量均值在5.80～9.02 g.kg-1,表现为轻度至中度盐化;各层土壤中,pH在8.2～8.4、EC在0.70～1.38mS.cm-1、SAR在0.25～0.64,未出现碱化现象。冗余分析表明:不同层次土壤中,Ca2+与SO24-、Na+与SO24-保持较好的关联性。TS的空间分布,在0～70cm全剖面上主要受控于Na+、SO24-、Ca2+和Mg2+;分层与全剖面的情况略有不同,但Na+、SO24-在各个土层仍为最主要的控制离子。EC在全剖面上的空间分布受控于Na+、SO24-;50～70 cm土层主要受Na+与Cl-的控制,其他土层与全剖面相同。pH受控于CO23-;除0～10 cm土层受HCO3-影响外,其他土层与全剖面相同。SAR在全剖面的空间分布受环境因子的影响较小,除50～70 cm土层受Cl-因子的制约外,0～50 cm土层未表现出明显的控制因子。
Spatial distribution characteristics of total salt (TS), pH, conductivity (EC), sodium adsorption ratio (SAR) and salt ion composition in oasis soil in the Manas River Basin were analyzed using classical statistics and redundancy analysis . The results showed that the soil salinity showed obvious bottom-poly accumulation. The average total salt content of all soil layers was between 5.80 and 9.02 g · kg-1, showing slight to moderate salinization. 8.4, EC at 0.70 ~ 1.38mS · cm-1, SAR at 0.25 ~ 0.64, no alkalization occurred. Redundancy analysis showed that: Ca2 + and SO24-, Na + and SO24- in different soil layers maintained a good correlation. The spatial distribution of TS is mainly controlled by Na +, SO24-, Ca2 + and Mg2 + in the 0 ~ 70cm total cross section. The stratification and total cross section are slightly different, but Na + and SO24- are still the most important Control ions. The spatial distribution of EC in the whole section is controlled by Na + and SO24-. The 50-70 cm layer is dominated by Na + and Cl-, while the other layers are the same as the full section. The pH was controlled by CO23-. Except for 0-10 cm soil layer affected by HCO3-, the other soil layers were the same as the whole section. The spatial distribution of SAR in the whole section is less affected by environmental factors, except that the 50 ~ 70 cm layer is controlled by the Cl-factor, while the 0-50 cm soil layer does not show obvious control factors.