【摘要】 本文通过模拟降雨及降雨后自然条件下的土壤表面水分蒸发,研究了粉煤灰和城市污泥改良荒漠土壤对持水性能的影响。研究结果表明,施用粉煤灰和城市污泥改良后的土壤饱和含水率比对照荒漠土壤提高了79.46%,持水时间提高14天左右。这对于在干旱缺水的荒漠地区进行植树造林,恢复生态环境,提高有限的水资源利用率,防止荒漠化的扩大具有十分重要的理论指导意义。更多还原

【Abstract】 To study the water–holding capacities of desert soil and the soil improved with coal ash and sewage sludge,experiments were designed to simulate rainfall and natural evaporation.The result indicatedthat the water-saturation coefficient of the improved soil was much higher than that of the desert soil(about 1.95 times) and the water-holding time of the improved soil was prolonged for 7 days more than that of the desert soil.This result is of significance theoretically in desert soil improvement for forest-planting.更多还原