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水稻播种后,先在床面铺一层地膜,然后再用有孔塑料薄膜覆盖在拱架上,这种旱育苗方法就叫有孔膜、地膜双层覆盖育苗。据海城县八里乡农业技术推广站调查,这种育苗方法能自然通风,床温均匀,秧苗不易徒长,立枯病较轻。秧苗具有生根早、生长快、发根量多、成苗率高以及茎粗叶挺长势稳健、干鲜重和充实度高等特点。一般可提早3～5天插秧,插后3天左右开始发根,5～7天见蘖,成熟期比一般旱育苗早3～5天,增产5％左右。这种育苗方法,便于管理、省工、省塑料布,一般不用揭布炼苗,可延长塑料布的使用年限,降低育苗成本。
Rice sowing, the first layer of film in the bed shop, and then covered with perforated plastic film in the arch, this method is called dry seedling hole membrane, double cover film nursery. According to Bali County, Haicheng County Agricultural Technology Extension Station survey, this nursery method to natural ventilation, bed temperature, seedlings are not easy to grow, blight less. Seedlings have the characteristics of early rooting, rapid growth, large amount of rooting, high seedling rate, and stable growth of stem and leaves, high dry and fresh weight, and high degree of fullness. Generally 3 to 5 days earlier planting seedlings, inserted about 3 days after the beginning of hair roots, see tillers 5 to 7 days, maturity earlier than the general drought nursery 3 to 5 days, an increase of about 5%. This nursery method, easy to manage, labor-saving, the province plastic sheeting, generally do not have to expose hardening, can extend the useful life of plastic sheeting, reduce nursery costs.