Glass greenhouses are a type of facility agriculture greenhouse with a long service life. However, the problem of humidity control needs to be solved in the use of glass greenhouses. How to effectively control the humidity in the greenhouse and reduce the occurrence of pests and diseases is crucial.
1. Cleverly use the top window for regular ventilation
The top of the glass greenhouse will be installed with staggered window natural vents. The vents are set at the high point of the peak but the side. The size of the top glass ventilation window is 2 meters by 1 meter, and the size of the top sun panel ventilation window is four meters by one meter. If the glass greenhouse is closed for a long time, the humidity in the greenhouse will naturally increase, so proper ventilation at the right time is a good way to reduce humidity.
It is worth noting that ventilation should be carried out at noon or around noon, because the indoor temperature has accumulated and climbed, and it is obviously higher than the outdoor temperature. Otherwise, it will cause the indoor temperature to drop. Especially in winter and spring, when the indoor temperature drops below the reasonable growth temperature of the plant, the vents should be closed in time. Guangyuan Greenhouse is in the industry.
2. Increase light transmittance
We can increase the light in the greenhouse by opening the external shading system and the internal shading system of the glass greenhouse. Increasing light transmittance can increase the room temperature. Only when the room temperature rises can normal ventilation be carried out.
3. Heating and reducing humidity
This method can not only meet the temperature needs of vegetables, but also reduce the relative humidity of the air. When the plants grow to be resistant, water the greenhouse and raise the temperature to about 30℃ for one hour, then ventilate and dehumidify. After 3 or 4 hours, when the humidity in the greenhouse is lower than 25℃, it can be repeated once.
4. Reasonable watering to reduce the source of humidity
Water is the main factor that causes the increase of indoor humidity, so how to water becomes an important measure to control humidity. In winter and spring production, you can choose to water the ditch on a sunny day or water the plants by division. If the ground film is covered, you can use dark irrigation under the film. When watering, the amount of watering should be strictly controlled to prevent excessive indoor humidity. After each watering, proper ventilation and timely hoeing and loosening of the soil can reduce soil moisture and air humidity.
5. Mulching
Mulching can reduce the evaporation of soil moisture and is an important measure to reduce indoor air humidity. For example, in a solar constant temperature and humidity glass greenhouse, the method of using large and small ridges with alternating ridge spacing and double ridges covered with mulch is adopted. When watering, water flows into the small ridges under the mulch. The mulch prevents the evaporation of water, which prevents the air humidity in the greenhouse from increasing significantly after watering.
6.choose the right insulation curtain material
Insulation curtain materials with good moisture permeability and moisture absorption, such as non-woven fabrics, can prevent condensation on the inner surface and prevent dew from falling on the plants, thereby reducing air humidity.
