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江苏省北部沿海造林的土壤问题,主要是土壤盐分及其他性状、地下水以及黄化问题。这里分别就这三方面淡谈个人的看法。 一、土壤盐分及其他性状问题 江苏省北部海滨海冲积平原是由黄河,淮河和长江的冲积物,在海水岸流作用下沉积而成,因此最初的土壤都含有大量可溶性盐类,属于滨海盐土类。这些土壤中的盐分,以氯化钠为主,还有钾、钙、镁等阳离子,硫酸根阴离子以及少量的重碳酸根阴离子。当土壤全盐量(以焙干残渣表示)在0.2％以上时,氯化钠约占全部盐分的80％;当全盐量
Soil problems in afforestation along the coast of northern Jiangsu Province are mainly soil salinity and other traits, groundwater and yellowing problems. Here are the personal views on these three aspects. First, the problem of soil salinity and other traits Jiangsu coastal northern seafront alluvial plain by the Yellow River, the Huaihe River and the Yangtze River alluvial deposits, formed by the shoreline sediment deposition, so the first soil contains a large number of soluble salts, belong to the coastal salt class. The salts in these soils are mainly sodium chloride, as well as potassium, calcium, magnesium and other cations, sulfate anions and a small amount of bicarbonate anions. When the total salt content of the soil (indicated by the residue on drying) is above 0.2%, sodium chloride accounts for about 80% of the total salt content. When the total salt content