本文着重阐述了关于膜下滴灌三个问题 :①技术优点 :省水50%以上、压盐作用明显、提高肥料利用率、并且能够书省机力 ,达到增产的目的。②增产机理 :保苗90 %以上 ,根系发生量高、植株发育速度快、干物质积累多、成铃率高 ,产品的品质好。③具有可观的社会效益、生态效益、经济效益以及较快推广速度。 This article focuses on three issues on the drip irrigation under the film: ① technical advantages: more than 50% water saving, pressure salt effect is obvious, improve fertilizer utilization, and can Shuji provincial power to achieve the purpose of increasing production. ② yield-increasing mechanism: seedling more than 90%, the root amount is high, plant development speed, accumulation of more dry matter, into a high rate of bell, the product of good quality. ③ has considerable social benefits, ecological benefits, economic benefits and faster promotion speed.