Methods of dehumidification in fruit greenhouses:
1. Ventilation and dehumidification of greenhouses. Ventilation is a good way to reduce humidity. Ventilation must be carried out at high temperature, otherwise the indoor temperature of the multi-span greenhouse will drop. If the temperature drops too fast during ventilation, close the vents in time to prevent the vegetables from being harmed by the sudden drop in temperature.
3. Warm up and dehumidify. This method can not only meet the temperature requirements of vegetables, but also reduce the relative humidity of the air. When the plants grow to be resistant, water the closed shed and heat up to about 30 ℃ for 1 hour, and then ventilate and dehumidify. After 3-4 hours, it can be repeated once when the shed temperature is lower than 25 °C.
4. Use insulation curtain material with good hygroscopicity. Thermal insulation curtain materials with good moisture permeability and moisture absorption, such as non-woven fabrics, can prevent dew condensation on the inner surface of the shed and prevent dew from falling on the plants, thereby reducing the air humidity of the multi-span greenhouse.
5. Natural moisture absorption. It can use straw, wheat straw, quicklime and other materials to spread between the rows to absorb water vapor or fog to achieve the purpose of dehumidification.
