第一主成分综合反映了区内土壤盐渍化程度，第二和第三主成分联合反映了土壤的碱性特征。
The first principal component can denote the degree of soil salinity, and the second and third principal component can denote the degree of soil alkalinity.
表层土壤含盐量，以及盐分组成和积盐厚度等是研究土壤盐渍化程度分级应考虑的主要因素。
The salt content, salt composition and thickness of concentrated salt in the top layer of soil are main factors that should be taken into account in soil salinity classification.
利用地理信息系统软件，绘制灌区不同土壤层次的盐分分布图，定量评价了灌区内土壤盐渍化程度的分布状况。
The distribution maps of soil salt content were obtained using GIS, which quantitatively assess the distribution condition of saline soil in irrigation area.
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