乌梁素海湖滨带盐碱土碱化参数与特征分析

Parameters and characteristics of saline soils around Ulansuhai Nur.

为了研究乌梁素海湖滨带,不同植被的土壤盐碱特征,测定了乌梁素海湖滨带盐碱土的碱化度（ESP）、钠吸附比（SAR）、总碱度、pH值和含盐量等指标,分析了该类型的土壤的简化特征及其垂直分布态势。结果表明,乌梁素海湖滨带土壤可溶性例子组成以Na＋、SO42-和C l-为主,各土层中Na＋占阳离子总量比例平均多在63.6%以上,SO42-占阴离子总量比例多在33.24%~88.96%之间,Na＋是造成该类土壤碱化加重的主要因素。由于4种碱土的碱化程度不同,碱化度高的土壤出现在土层中不同高度。土壤ESP随含盐量、总碱度的增大而增大。ESP和SAR呈显著相关关系（R2=0.955,n=16）。结合地下水和降水等资料对土壤剖面盐分分布状况的形成原因进行了分析。

In order to find out the law of the saline soil around Ulansuhai Nur.ESP,SAR,the total alkalinity,pH and salinity of the saline soil which come from Ulansuhai Nur.were mesasured.The analysis results reveal the type of the soils feature and distribution in vertical condation.The Ulansuhai Nur.soil soluble content is mainly composed of Na＋,SO2-4 and Cl-,which Na＋ is achieving up to 63.6% and the SO2-4 is nearly between 33.24%~88.96%,the Na＋ is the principle cause to aggravate soil alkalinization.The high ESP comes out in different position which becomes higher when the salt content and the total alkalinity are high.It can be seen that the associative relationship between the ESP and the SAR is in significant correlation which R2=0.955,and n=16.The formation reason with the salts distribution of the soil cross section is analysed with the groundwater and the precipitation which comes from the study area.