进入深秋以后,气温急剧下降,这时,菜农应做好大棚蔬菜的防寒工作。现介绍几种简易的秋季大棚蔬菜防寒方法。 1.多层覆盖法:在有条件的地方,可搞大棚多层覆盖,如大棚内扣小拱棚,防寒保温效果好。没有条件搞小拱棚的,在寒潮到来之前,用破草帘、草袋片、秫秸等围在大棚近地面四周,也有一定的防寒效果。 2.熏烟防寒法:霜冻前,在棚外熏烟可使棚周围气温提高1～2℃,甚 After entering the late autumn, the temperature dropped sharply, at this time, vegetable farmers should do a good job cold-proof greenhouse vegetables. Here are a few simple autumn greenhouse vegetables cold method. 1. Multi-layer coverage method: Where conditions permit, you can engage in multi-storey greenhouses covered, such as shed small Shed within the shed, cold insulation effect is good. No conditions to engage in a small shed, before the arrival of the cold, with broken straw curtain, straw bag film, straw, etc. around the greenhouse near the ground, but also have some cold effect. 2. fumigation method: before frost, fumigation outside the shed can make the temperature around the shed increased 1 ~ 2 ℃, and even