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选取典型苏打碱化土壤剖面,分析了0～200cm深度主要盐分离子(Ca2+、Mg2+、Na+、K+、CO32-、HCO3-、Cl-和SO42-)的垂直分布规律。对各离子之间的相关性进行了统计分析。结果表明,测试土样离子以Na+和HCO3-离子为主,其剖面分布规律是表层含量较低,在80cm左右逐渐增至最大值,其后离子含量随深度而降低,至160cm以下则又随深度而增加,即在整个土壤剖面上大致呈倒“S”曲线分布。CO32-、HCO3-、Cl-与Na+,CO32-、HCO3-与Cl-之间均是相关系数大于0.80的极显著相关;除K+离子外,其它7个离子间均具有显著相关性,这表明该苏打碱化土壤盐分离子组成具有复杂性的特点。
A typical soda alkalization soil profile was selected to analyze the vertical distribution of main salt ions (Ca2 +, Mg2 +, Na +, K +, CO32-, HCO3-, Cl- and SO42-) at 0-200 cm depth. The correlation between ions was statistically analyzed. The results show that the main ions are Na + and HCO3- ions. The distribution of the samples is lower in the surface layer and gradually increases to the maximum at about 80cm. The ion content decreases with the depth to below 160cm Depth and increase, that is roughly the entire soil profile inverted “S ” curve distribution. There was a significant correlation between CO32-, HCO3-, Cl- and Na +, CO32-, HCO3- and Cl- with a correlation coefficient greater than 0.80, except for K + ions, indicating significant correlations among the other seven ions The soda alkalization soil salt ion composition has the characteristics of complexity.