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粘土、柴草沙障是工程固沙的主要措施,但由于柴草沙障有效期短,实际效益低,粘土沙障虽有效期较长,但成本高,劳动强度大,为此,笔者从一九八八年开始在民勤中沙窝做了地膜沙障设置试验。一九八九年又在民勤小西沟无量庙沙丘上设置地膜沙障三千六百一十七米,压沙十六亩,每亩成本八元三角。经检查,沙面无风蚀,沙障完好率达百分之百,比柴草沙障节约投资一倍多;与粘土沙障相比,节约投资三倍,这是一种较好的工程固沙措施。
Clay and firewood sand barrier are the main measures for sand fixation. However, due to the short effective period of firewood sand barrier and the low actual benefit, clay sand barrier has a long effective period, but its cost is high and labor intensity is high. Therefore, from 1988 Started in Minqin Sandwo made membrane sand barrier set test. In 1989, it set a sand barrier of 3,617 and a sand sheet of 16 acres on the dune of Minqin ditch in Minqin, Minqin, with a cost of 8 yuan per mu. After inspection, sand surface no wind erosion, sand barrier intact rate of 100%, save more than double the firewood sand barrier investment; and clay sand barrier, saving three times the investment, which is a better engineering sand fixation measures.