2. Site selection, construction of sheds and high dryness. Do not construct large sheds or solar greenhouses where groundwater levels are too high. Choose high-desert, well-drained sites. If there is snow cover, high soil moisture, or precipitation before cover film, take dehumidification measures. When the humidity in the shed is appropriate, cover the film again.
3. Reduce watering. Minimize the number of watering and irrigation, and prohibit flooding. Take a ditch-gap method. It can also be filled with water on a sunny morning. After irrigating, loose soil is used to destroy the capillaries of the soil and reduce the evaporation of water.
4. Let the air vent. In the premise of not affecting the growth of vegetables, it is necessary to increase the amount of air release and the time of air release.
5. Cover the film. It is better to perform drip irrigation under the membrane in the shed, so that the soil is not compacted, soil temperature is not easy to reduce, water is also less, and can reduce the humidity.
6. Use drop-free film. The inner surface of the dripless membrane does not form water vapor, so it can increase the light, increase the ground temperature, and reduce the relative humidity in the greenhouse. For the covered film, if there are too many water droplets, wipe it with rag or soy powder, or when the water droplets are scattered, wipe it with a rag.
7. Hang a reflective screen. At the rear pillar of the solar greenhouse, a light curtain is suspended along the east-west pull wire, and the dehumidification also increases the brightness and raises the temperature.
8. Dust method medication. Use dust or smog method to prevent and control vegetable pests and diseases in greenhouses and avoid spraying through leaves or using drip irrigation.
9. Do a good job of draining. Dig out the drainage ditch outside the shed so that it can be drained in time.
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