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本研究从剖面形态、粘土矿物及水分物理性质等方面，系统地揭示了江苏淮北东海县低洼地区砂姜黑土的土壤特征。该类土壤剖面结构因深度而变化，但是剖面的层次化却很弱，一般呈ＡＣ型剖面。粘土矿物以蒙脱石为多；各层土壤粘粒（小于０．００２ｍｍ）含量在４０％～６０％；线性膨胀系数（ＣＯＬＥ）为０．１４～０．１８。土壤膨胀收缩性能强，在旱作物种植季节，土表易生网状裂隙。江苏淮北低洼地区的砂姜黑土属于一种比较典型的变性土，这类土壤所显示的特征与全球变性土的性状十分类似。本文提供了在变性土上进行耕作试验的部分田间测定数据。我国在变性土上进行水旱轮作已３０余年，稻后旱作若能进一步推广少耕法，并结合秸秆盖田，则仍有较大的增产潜力
In this study, we systematically revealed the soil characteristics of Shajiang black soil in the low-lying area of Donghai County, Huaibei, Jiangsu Province, from the aspects of section shape, clay minerals and water physical properties. The structure of this type of soil profile changes due to depth, but the stratification of the profile is weak, generally AC-type profile. Clay minerals are mostly montmorillonite. The content of soil clay (less than 0.002mm) in each layer is 40% -60% and the linear expansion coefficient (COLE) is 0.14-0.18. Soil expansion and contraction of strong, dry season in the planting, soil surface prone network fissures. Shajiang black soil in the low-lying area of Huaibei in Jiangsu belongs to a typical denatured soil. The characteristics of such soil are very similar to those of the global denaturalized soil. This article provides some field data for tillage tests on denudated soil. China has conducted more than 30 years of drought and drought rotation on degenerated soil. If the dry cultivation after paddy cultivation can further promote the cultivation of less tillage and combine the straw with the covered fields, there is still a great potential for increasing production