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以开都河流域下游绿洲为例,应用灰色关联度方法分析了6种影响因子在土地盐渍化过程的相对影响力大小。结果表明:自然和人为因素共同作用于研究区土壤盐渍化过程。土壤含盐量与土壤盐渍化影响因子之间的关联度排序0—10cm层为:地下水埋深>最近排水渠距离>高程>最近灌溉水渠距离>最近湖岸距离>地下水矿化度;10—30cm层为:地下水埋深>最近湖岸距离>最近排水渠距离>高程>最近灌溉水渠距离>地下水矿化度;30—50cm层:最近灌水渠距离>地下水埋深>最近排水渠距离>地下水矿化度>最近湖岸距离>高程。在3个不同土层深度上土壤盐渍化影响因子的影响力不同,土壤盐渍化防治需要综合考虑多种影响因子的作用。
Taking the oasis in the lower reaches of the Kaidu basin as an example, the relative influence of six kinds of influencing factors on the process of land salinization was analyzed by the gray relational degree method. The results showed that both natural and human factors contributed to the soil salinization process in the study area. The relationship between soil salinity and soil salinization factors is 0-10cm: depth of groundwater> nearest drainage distance> elevation> distance of nearest irrigation channel> nearest lake shoreline> degree of groundwater salinity 10- 30cm: depth of groundwater> nearest shoreline distance> nearest drainage distance> elevation> distance of nearest irrigation canal> degree of groundwater salinity 30-50cm layer: distance of nearest irrigation channel> depth of groundwater> nearest drainage distance> groundwater mine Degree> nearest shoreline distance> elevation. The influence of soil salinization influencing factors is different in three different depths of soil layer. The control of soil salinization need to consider the effect of many factors.