内蒙古阿拉善左旗红砂荒漠土壤盐分离子含量与其含水量相关关系研究

Study on the Correlation between Soil Salinity Ions Content and Water Content of the Reaumuria soongorica Desert in Alxa Zuoqi of Inner Mongolia

对内蒙古阿拉善左旗红砂荒漠土壤盐分离子含量和土壤含水量的分布规律进行了研究,并对两者之间做了相关和回归分析。结果表明,阿拉善左旗红砂荒漠土壤中盐分离子的含量,阳离子以Na+为主,阴离子以SO42-为主。在垂直分布上,Mg2+、Na+、Cl-和SO42-含量随着土层深度的增加而增加,而K+、CO32-和HCO3-含量随着土层深度的增加而减少。阿拉善左旗3个地区(乌力吉、长流水和孪井滩)的土壤含水量介于1.39%～8.01%之间,平均含水量为5.02%。3个地区中,红砂荒漠土壤所含盐分离子中的Mg2+、Cl-和SO42-均与其土壤含水量之间存在明显的线性关系。

The distribution of soil salinity ions content and water content of the Reaumuria soongorica desert in Alxa Zuoqi was studied, and its correlation and regression analysis were carried out. The results showed that the content of cations Na＋ was mainly in the soil salt in the Reaumuria soongorica desert of ALxa Zuoqi, and the anion was mainly SO42-. In the vertical distribution, the ion contents of Mg＋, Na＋, Cl- and SO4^2- increased with the increase of depth, whereas the contents of K~, CO32- and HCO3- decreased with the increase of depth. The soil water content of three districts like Wuliji, Changliushui and Luanjingtan ranged from 1.39% to 8.01% in Alxa Zuoqi, with an average water content of 5.02%. There was significantly linear relationship between soil water content and Mg2＋, C1- and SO4^2- of soil salinity ions in desert grasslands of Reaumuria soongorica among three districts of Alxa Zuoqi.