How should a multi-span greenhouse be dehumidified?

People who are engaged in the greenhouse industry know that it is important to keep the greenhouse dry. Scientists engaged in greenhouse facility design research can design and manufacture basic and modern automatic control greenhouses according to the different needs of users. So how do you dehumidify a multi-span greenhouse so that plants can grow normally?

1. Mulch covering. Covering with plastic film can reduce the evaporation of soil moisture and is an important measure to reduce indoor air humidity. In addition, insulation curtain materials with good hygroscopicity are used. The good moisture permeability and hygroscopicity of the insulation curtain material can prevent dew from falling on the plants, thereby reducing the air humidity in the multi-span greenhouse.

2. Raise temperature and lower humidity. Using 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 to raise the temperature to about 30°C for 1 hour, and then ventilate and drain the moisture. It can be repeated once after 3-4 hours when the shed temperature is lower than 25℃. You can also use natural moisture absorption such as straw, wheat straw, quicklime, etc. to spread the materials between the rows to absorb water vapor or fog to achieve the purpose of dehumidification.

3. Ventilate. Ventilation is a good way to reduce humidity, but ventilation must be carried out when the temperature is high, otherwise it will cause the indoor temperature of the multi-span greenhouse to drop. If the temperature drops too quickly during ventilation, close the vents in time to prevent the sudden drop in temperature from harming the vegetables. Therefore, ventilation conditions must be controlled, otherwise the consequences are unpredictable.