The air humidity in the shed is often greater than the open air, and it is in a humid state. Therefore, the air humidity management in the shed is mainly dehumidification.
First, ventilation and dehumidification. Ventilation is a good way to reduce humidity. Ventilation must be done at high temperatures, otherwise it will cause the room temperature to drop. If the temperature drops too quickly during ventilation, close the vents in a timely manner to prevent a sudden drop in temperature and damage the vegetables.
Second, a reasonable watering. Watering is the main factor that causes indoor humidity to increase. Winter and spring production can choose sunny gutters or ramets watering, film cover can be used under the film dark irrigation. Watering should strictly control the amount of water, to prevent indoor humidity is too high. After each watering, the air is properly ventilated, and timely slashing of loose soil can reduce soil moisture and reduce air humidity.
Third, mulching. Covering with plastic film can reduce the evaporation of soil moisture, which is an important measure to reduce indoor air humidity. For example, in the shed, large and small ridges and ridges are used to cover the ridges. When water is poured, the water flows into the small ridges below the mulch. The mulch prevents the evaporation of moisture, which also prevents the humidity of the air in the shed from being greatly increased.
Fourth, temperature and humidity. This method can meet the temperature requirements of vegetables, but also reduce the relative humidity of the air. When the plant grows to have resistance, the watering canopy is heated to about 30°C for 1 hour, and then ventilated and vented. After 3-4 hours, the temperature of the shed can be less than 25°C.
Fifth, the use of good thermal insulation curtain material. A material with good moisture permeability and hygroscopicity, such as a non-woven fabric, can prevent condensation on the inner surface of the shed and prevent the dew from falling on the plants, thereby reducing the humidity of the air.
Six, natural moisture. You can use rice straw, wheat straw, quicklime and other materials to spread between rows and absorb water vapor or fog to achieve dehumidification.
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