流沙地铺设沥青隔水层防渗试验报告

新开垦流沙地的灌水和养分渗漏现象十分严重。为解决此问题,在土层50厘米深处辅设了-薄层不透水沥青层。试验表明,采取此种措施后,试验区的灌溉水量比对照区减少了50-60%;速效氮的淋溶损失也有减少。由于保水、保肥,促进作物产量提高。

Application of Impervious Asphalt Layer in Sandy Soil

Deep percolation of irrigation water and fertilizers is a common phenomenon in sandy soils. It seriously reduces the amounts of water and fertilizers available to crops. In order to solve this problem, We place an impervious asphalt layer at a depth of 50 cm in the newly-broken sandy soil.Experimental results showed that the amount of irrigated water in the barried plots saved 54.8-66.0%. The leaching loss of available nitrogen in the cultivate d horizon reduced, but the average yields of soybean and bean increased as compared with the control plot.