利用南京第二热电厂湿排陈灰进行菜田土壤改良试验。试验结果表明 ,在本次施灰量范围内 ,蔬菜的产量与施灰量成正相关 ,增产效果明显。试验中测试了不同施灰量土样的粒度、容重、孔隙率、有机质、全P、全N、全K、速效K、pH值等理化参数 ,对蔬菜的增产机理作了深入的探讨。由于施用粉煤灰能降低土壤容重 ,提高土壤孔隙率 ,协调土壤的水、肥、气、热 ,调节土壤三相比 ,因而能为蔬菜生长创造良好的土壤环境 Soil Improvement Experiment of Vegetable Field by Using Wet Ash Pale ash of Nanjing No.2 Thermal Power Plant. The results showed that within this range of application of ash, the yield of vegetables was positively correlated with the amount of ash applied, and the yield increase was obvious. The physical and chemical parameters such as grain size, bulk density, porosity, organic matter, total P, total N, total K, available K, pH and other parameters were tested in the experiment. As the application of fly ash can reduce soil bulk density, increase soil porosity, coordinate soil water, fertilizer, gas, heat, adjust the soil three-phase comparison, which can create a good soil environment for the growth of vegetables