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冬天大棚种植在一定程度上受到了温度的影响,大棚蔬菜在不加温的情况下,采取一些常用而又效果好的方法能够一定程度上保证蔬菜正常生长。多层膜覆盖一层棚膜的保温性能较差,当外界气温低时,棚内为0℃左右就会出现冻害。因此需要多层覆盖薄膜来保证棚内温度。做到“三膜一帘”覆盖,即覆盖大棚膜、小棚膜、地膜、大棚上再加盖草帘,当外界气温降到-5℃,棚内一般也不会发
Winter greenhouse planting to a certain extent by the temperature, greenhouse vegetables in the case of not warming, to take some commonly used and effective way to a certain extent, to ensure the normal growth of vegetables. Multi-layer film covered with a greenhouse film insulation performance is poor, when the outside temperature is low, the shed is about 0 ℃ will appear frost damage. Therefore, multi-layer cover film to ensure shed temperature. Do “three film a curtain ” coverage, that is, covering the greenhouse film, small shed film, plastic film, greenhouse and then covered with straw curtain, when the outside temperature dropped to -5 ℃, the shed generally do not