施灰土壤的理化性质分析及作物增产机理探讨

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

Analysis of the Physical and Chemical Properties of the Soil Applied with Fly Ash and Study on the Mechanism of Increasing crp Production

The experiment of ameliorating the soil of vegetable fied with fly ash from the Second Power Plant in Nanjing has been conducted. The results show that the yield of the vegetable is directly ratio to the amount of the flyash added to the soil under the condition that the amount of flyash ranges within the values of this experiment. The effect of increasing production is visible . The parameter of physical and chemical characteristics such as granularity, conservancy unit weight, porosity, organic matter, total P, total N, total K, quick effect K and pH are tested and analyzed. The mechanism of increasing production of the vegetable is thoroughly discussed. It is to apply fly ash into the soil that the unit weight of soil is lessened, the porosity is increased, the water, fertilizer, air and heat of the soil are coordinated and the proportions of gas-phase, liquid-phase, solid-phase of the soil are balanced. Thus favorable soil environment is created.