目前,“两户”和小菜园的蔬菜生产多在小型简易温室播种育原苗,再移到薄膜冷床培育成苗。要想培育出整齐健壮的秧苗,必须掌握好放风技术。冷床育苗的放风,不仅是通过气体交换调节温、湿度,而且能促进秧苗运动,有利于茎叶的机械组织发达,提高抗逆性。放风时,要根据天气的变化,采取不同的放风方法,才能收到预期效果。 At present, “two households” and small vegetable garden vegetable production in a small simple greenhouse planting seedlings, and then moved to the film cooling bed nurturing seedlings. In order to nurture a neat and tidy seedlings, we must master good ventilation technology. Cold bed nursery ventilation, not only through the exchange of gas regulation temperature and humidity, but also to promote seedling movement, is conducive to the development of mechanical and chemical stems and leaves, improve resistance. Ventilation, according to the weather changes, take a different approach to the wind, in order to receive the desired results.