Ventilation and ventilation is the simplest method of dehumidification in greenhouses. Generally after each irrigation, under the premise of not affecting the temperature, it is necessary to increase the amount of ventilation, the moisture out of the shed, into the outside world of dry air, reduce the humidity of the air inside the shed. When ventilating and ventilating, the degree of ventilation must be determined according to the need. Generally, it should be performed at 9-14 hours so that the dehumidification and heat preservation can be balanced with each other. Ventilation and ventilation is to open the skylight, or open the window, open large or small, open for a long time or short, we must correctly analyze and master, handle the relationship between good humidity and heat preservation. In winter, the use of insulation is the main purpose, which reduces the number and time of ventilation; in the spring, the amount of ventilation is increased to coordinate the temperature and humidity in the shed.
The cultivating cover soil must be fully watered before or after the planting of the vegetables. After the water has penetrated, the cultivator and the soil cover or the ground covering and the plastic film covering are used to reduce the evaporation of water and maintain the suitable soil temperature to reduce the air. Relative humidity.
Water control and dehumidification regulate the humidity in the shed by reducing the amount of irrigation and the number of irrigations. Under the premise of satisfying the moisture required for the growth of vegetables, the number of irrigations should be minimized and the soil and air humidity should be reduced. In order to make the change of air humidity small and satisfy the vegetable's need for soil moisture, we can adopt watering methods such as ditching, digging watering or drip irrigation to avoid flooding. When the humidity is low, we need to increase the humidity as quickly as possible. , can sprinkle water or spray on the ground.
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