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为给江苏省两种典型水稻土的分类和利用提供更多的科学依据,我们对两种不同起源土壤的四个剖面进行了研究。一类为下蜀黄土丘陵谷地,另一类为洪泽湖以东的低温地。这两个地区均为古老的耕种土壤,种植水稻历史悠久,耕种制度为稻麦(油菜或绿肥)水旱轮作。气候温暖潮湿,生长期长,无霜期220天左右,年平均温度约15℃,平均降雨量1000毫米左右。马肝土和红砂土是这两个地区的主要土种,本文对这两种土壤的理化性质进行了探讨。
In order to provide more scientific evidences for the classification and utilization of two typical paddy soils in Jiangsu Province, we studied four profiles of soils from two different origins. One is the loess hilly valley in Xiashu and the other is the low-temperature land east of Hongze Lake. Both areas are ancient cultivated soils with a long history of cultivation of rice and wheat (rape or green manure). Warm and humid climate, long growing period, frost-free period of about 220 days, the annual average temperature of about 15 ℃, the average rainfall of about 1000 mm. Ma Gan soil and red sandy soil are the main soil species in these two regions. The physical and chemical properties of these two soils are discussed in this paper.