黄河三角洲盐碱地面积超过总面积的 70 %,而盐碱地改良分区是因地制宜、综合治理盐碱地的前提。通过综合运用地理信息系统的各种空间数据分析功能,将黄河三角洲土地盐碱化现状分为 :非盐碱地、轻度盐碱地、中度盐碱地、重度盐碱地、滩涂 5个区,并结合地下水长期观测资料,进行成因分析,建立了黄河三角洲盐碱地改良分区模型。立足土地盐碱化的现状,充分考虑地下水埋深和矿化度,把黄河三角洲盐碱地按改良难易程度分为 :易改良区、较难改良区、难改良区、近期不宜作改良区,并针对不同的盐碱地改良区提出了相应的土壤改良对策。

Soil salinization is the major land degradation problem and has seriously influenced the sustainablal agricultural development. Regionalization of salt affected land is the precondition for effective amelioration. The present saline land situation is obtained by remote sensing image processing. The cause that leads to land salinization is analysized. Especially, the two key factors, ground water depth and mineralization degree that control land salinization, are analysized by using long term observation data. Previously, regionalization of saline soil was done descriptively and artificially. Based on the present saline land situation, ground water depth and ground water mineralization degree, the regionalization of saline land for amelioration in the Yellow River Delta is done quantitatively. Four different saline land amelioration regions are delineated, namely, easy amelioration region, relatively difficult amelioration region, difficult amelioration region and unfavorable amelioration region. Countermeasures for ameliorating saline soils are put forward according to ecological conditions of different saline land regions. This not only greatly improves regionalization speed but also accuracy.