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目前的塑料棚防寒保温方法较多,如利用双层膜棚内扣小棚、棚外围草苫、垅底铺酿热物、复盖地膜及草袋片、加设取暖设备或夜间点火等。这些措施因条件和需要可以单独采用,也可以结合使用,以结合用的形式效果更好些。为了摸索出北安一带寒区大棚内增加复膜层次的防寒保温效果以及增加复膜层次对棚内作物生长发育的影响,增加防寒保温措施能提早定植的可行日期,我们安排了棚内多层次复盖的示范性试验。现将情况及结果报告如下:
The current plastic shed cold insulation methods, such as the use of double-film shed shed shed, shed the outer grass 苫, 垅 bottom shop stuffing, covered with plastic film and straw bags, add heating equipment or night lighting. Depending on the conditions and needs, these measures can be used alone or in combination to give better results in combination. In order to explore the Beinan cold area within the greenhouse to increase the level of antifreeze insulation effect and to increase the level of laminates on the greenhouse crop growth and development, increasing cold insulation measures to early colonization feasible date, we arranged a shed multi-level Covering the pilot. Now the situation and the results reported as follows: