1. Use EVA film. The adoption of EVA membrane can reduce the loss of natural light, improve the clarity in the shed, reduce the relative humidity of the air, promote the healthy growth of vegetable crops, and increase the resistance to pests and diseases. 2. Field coverage. Covering the surface with a plastic film and covering rice straw and other objects in the aisle can suppress the evaporation of soil moisture and reduce the air humidity in the greenhouse. When the coverage caused by water and fertilizer management is inconvenient, drip irrigation under the membrane can be used. 3. Ventilation. Ventilation is carried out around noon during the day and the vents are at the junction of the top membrane and the skirt of the greenhouse. The air outlet should be small and large first. When ventilating, prevent cold air from blowing in directly and cover the film before 5 o'clock in the afternoon. Blocking particles, bacteria and other pathogens in Anesthesia and breathing circuit from Breather Filter,B/V Filter,Hme Respiratory Filter,Heat And Moisture Exchanging Filters (Hmefs) Zhejiang Haisheng Medical Device Co., Ltd , https://www.hisernmedical.com
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