Abstract: This paper dealt with the changes of the soil chemical properties after transferring acid sulfate paddy soil to upland soil, and compared the economic profits among different land use patterns. The results show that transferring planting rice to planting sweet corns and vegetables significantly reduced soil acidity and the contents of hydrolytic sulfate, active aluminum and active iron in arable layer, and greatly increased economic profits. It was suggested that the environmental effects caused by transferring acid sulfate paddy soil to upland soil should be further studied and monitored in situ, so that, this special soil resource could be more rationally used.

Key words: Acid sulfate soil, Chemical properties, Rice, Sweet corn, Vegetables, nitrogen storage, carbon storage, forest age, plantation forest