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从1982年开始,海城市稻区推广水稻有孔双层膜旱育苗,至1987年已经普及20多个乡镇,几年来共示范开发有孔双层膜育苗29万多床,插秧面积达22.39万亩,取得了很好的增产效果和经济效益。有孔双层膜育苗是在普通薄膜旱育苗的基础上发展起来的。方法是,将覆盖苗床的薄膜纵向中间部分(宽约30—4O厘米)打成孔距、行距均为4厘米、孔径为4毫米的排孔,再用一块地膜于播种覆土后平铺于床面,待秧苗长出后撤掉地膜。前期靠双层地膜保温,后期靠有孔膜自然通风调温。实践证明,采用有孔双层膜育秧,有利于培养壮苗,
Since 1982, Haicheng rice paddy has been popularized in the area of paddy-hole double membrane drought nursery in 1987. By 1987, more than 20 townships and townships have been popularized. Over the past few years, a total of more than 290,000 beds have been developed for perforated double-layer membrane nursery with an area of 223,900 Mu, made a good yield and economic benefits. Hole bilayer membrane nursery is developed on the basis of ordinary thin film drought nursery. The method comprises the following steps: punching the longitudinal middle part (30-30 cm in width) of the film covering the seedbed into perforated holes with a spacing of 4 cm and a hole diameter of 4 mm; Surface, remove the film after the seedlings grow. Pre-double insulation by the film, the latter by natural ventilation with a porous membrane thermostat. Practice has proved that the use of perforated bilayer membrane nursery, is conducive to the cultivation of strong seedlings,