江苏滨海范公堤、串场河一线以东地区,为长江、淮河、黄河等江河沉积的滨海平原.在土壤发生与形成过程中都曾受海水的浸渍,土体均含可溶性盐类.目前土壤演变的总趋势是脱盐成土过程,但盐分上聚的次生盐渍化作用还相当明显.这两种作用的主次和强度各地区有所不同. The coastal plain at the bank of the Fanhai embankment and the Changchang river in the coastal area of ​​Jiangsu province is the coastal plain where the Yangtze River, the Huaihe River and the Yellow River are deposited, and both have been impregnated with seawater during the occurrence and formation of the soils, and the soils contain soluble salts. The general tendency is desalination and soil formation, but secondary salinization of salt accumulation is quite obvious, and the primary and secondary intensities of these two kinds of action are different in different regions.