探讨了酸性硫酸盐水稻土改为旱作后土壤化学性状的变异以及比较不同利用方式之间的经济效益．结果表明，酸性硫酸盐水稻土改种甜玉米和蔬菜后，土壤化学性状发生显著变化．耕层土壤酸度、水溶性硫酸根含量、土壤活性铝和活性铁含量均显著降低．经济效益得到显著提高．建议对水改旱后的环境效应进行深入研究以及进行定位观测，以便合理利用这一特殊的土壤资源 This paper discussed the variation of soil chemical properties after acid-sulphate paddy soil was converted to dry land and compared the economic benefits between different ways of utilization. The results showed that the soil chemical properties of acidic sulfate paddy soil changed significantly after sweet corn and vegetables were changed. Soil acidity, water-soluble sulfate content, soil active aluminum and active iron content in topsoil decreased significantly. Economic benefits have been significantly improved. It is suggested to conduct an in-depth study of the environmental effects of drought and water diversion and to conduct orientation and observation in order to make rational use of this special soil resource