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本文试从生态系统的观点,对比研究了苏北剥蚀平原区砂姜黑土与白浆土的发生特征。从研究铁锰结核和石灰结核的成因着手,探讨两种土壤的组合特点及其与生态环境演变的关系。结果表明,季节性氧化还原交替形成大量铁锰结核是这两种土壤的共同特征;石灰结核的组成物质来源于地下水,它是区域性地球化学沉积过程的产物。砂姜黑土与白浆土的组合在该区出现,是在生态环境演变的条件下,又受地形因素与区域性地球化学沉积作用共同影响的结果。
This paper attempts to comparatively study the occurrence characteristics of saprolite black soil and albic soil in the eroded plain of northern Jiangsu from the viewpoint of ecosystem. Starting from the study of the causes of iron-manganese nodules and lime nodules, the characteristics of the combination of the two soils and their relationship with the evolution of the ecological environment are discussed. The results showed that the seasonal redox alternation to form a large number of Fe-Mn nodules is the common feature of these two soils. The composition of lime nodules comes from groundwater, which is the product of regional geochemical deposition. The combination of lime-black soil and albic soil appears in this area, which is the result of the common influence of the terrain and regional geochemical deposition under the conditions of the evolution of ecological environment.