How should the multi-span greenhouse be dehumidified?

Dehumidification work in the multi-span greenhouse is very important. It is a kind of greenhouse composed of multiple individual greenhouses spliced together, so its dehumidification work is needed.

Cover with mulch. The use of mulching film can reduce the evaporation of soil moisture and is an important measure to reduce indoor air humidity. In addition, the insulation curtain material with good moisture absorption is used. The good moisture permeability and moisture absorption of the thermal screen material can prevent dew from falling on the plants, thereby reducing the air humidity of the multi-span greenhouse.

Increase temperature and reduce humidity. Using this method can not only meet the needs of vegetables for temperature, but also reduce the relative humidity of the air. When the plant grows to resistance, water and close the shed to heat up to about 30 ℃ for 1 hour, and then ventilate the moisture. It can be repeated once when the shed temperature is lower than 25℃ after 3-4 hours. It is also possible to use rice straw, wheat straw, quicklime and other natural moisture absorption to spread the material between rows to absorb water vapor or fog to achieve the purpose of dehumidification.

Ventilation. Ventilation is a good way to reduce humidity, but ventilation needs to be done at high temperatures, otherwise it will cause the indoor temperature of the multi-span greenhouse to drop. If the temperature drops too fast during ventilation, close the vents in time to prevent the sudden drop in temperature from harming the vegetables. Therefore, it is necessary to control the ventilation situation, otherwise the results are unpredictable.