宿豫县现有耕地 71.5 6hm2。其中潮土占 70 %左右 ,这些土壤为黄泛冲积而成。 2 0世纪 80年代初旱改水以前为低产土壤 ,这类土壤作物前期立苗困难 ,后期长势较差 ,粮食 667m2产 75 kg左右。旱改水后 ,土壤中的盐碱被大量淡水冲洗 ,再通过大种绿肥、秸秆还田等土壤改良措施 ,土 Suyu County has 71.5 6hm2 of cultivated land. Among them, about 70% of the fluvo-aquic soil accounts for the yellow-pan alluvial soil. In the early 1980s, drought-relief water was formerly a low-yielding soil. This kind of soil was difficult to stand in the early stage of the crop and worse developed in the late period. Grain yield was about 75 kg at 667 m2. After drought and water change, the saline soil in the soil is washed with plenty of fresh water, and then soil improvement measures such as large green manures and straw returning to the soil