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七十年代后期,蔬菜保护地迅速发展,其中塑料大棚占据很大面积。虽然塑料大棚可提早延后,获得较高经济效益,但由于一次性投资较大、茬口安排单一,且整个冬季空闲,棚架裸露越冬,致使大棚设施未充分发挥经济效益。为此我们于1983年开始进行塑料大棚周年利用的试验研究,经四年试验示范结果证明:蔬菜大棚周年利用在冬季创造了较好的棚内小气候,从而可促进越冬菜提早采收,早春应用大棚育成苗,扩大了育苗场地,利于培育壮苗,对其下茬定植果类蔬菜可加快缓苗,提早成熟。提高了大棚利用率和经济效益,丰富了淡季蔬菜市场。
The late seventies, the rapid development of vegetable protection, plastic plastic shed which occupy a large area. Although plastic greenhouses may be postponed earlier and obtain higher economic benefits, the greenhouse facilities have not fully utilized the economic benefits due to the large one-off investment, the single arrangement of stubble arrangements and the free availability of winter scaffolding. For this reason, we started the experimental study on the annual utilization of plastic greenhouses in 1983. After four years of trial and demonstration, the results show that the annual greenhouse vegetable use has created a good greenhouse microclimate in winter so as to promote early harvest of winter vegetables. In early spring, Greenhouse nursery seedlings, expanding nursery grounds, which will help nurture strong seedlings, planting vegetables can be accelerated next Huanmiao, early maturity. Improve the utilization of greenhouses and economic benefits, enrich the off-season vegetable market.