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西瓜三膜一苫早熟高产栽培技术，即小拱棚里覆膜，盖草苫，草苫外面覆盖天膜。该模式投资较小，取材容易，管理方便，效益显著，一般亩产３５００ｋｇ，产值３５００元，比地膜西瓜提早上市４０～５０天，单位面积效益是地膜西瓜的２．５～３倍。其主要技术措施是：１ 选用适?
Watermelon three film a 苫 precocious high-yielding cultivation techniques, that is, a small shed plastic cover, cover grass 苫, grass 苫 outside cover the membrane. The mode of investment is small, easy access, management convenience, significant benefits, the general yield 3500kg, the output value of 3,500 yuan, 40 to 50 days earlier than the membrane watermelon market, the unit area benefit is 2.5-3 times the plastic film watermelon. The main technical measures are: 1 selection of suitable?