Excessive humidity in greenhouse cultivation can cause severe disease. In order to reduce the humidity in the greenhouse and prevent the occurrence of diseases, the following measures can be taken:
Ventilation and ventilation: Excluding moisture and changing into the dry air outside, this is the simplest method of dehumidification, but it is necessary to prevent the temperature inside the booth from being lowered too low due to ventilation.
Covering with a non-drip film: The non-drip film can overcome the disadvantages of a large number of water droplets adhering to the inside of the film, significantly lower the temperature, and has a good light transmission performance, which is favorable for increasing the temperature and lowering the room.
Film Coverage: Film cover can greatly reduce surface water evaporation; and it can reduce the number of irrigation, thereby reducing air humidity.
Using drip irrigation or infiltration irrigation: Drip irrigation and infiltration irrigation not only saves water, saves labor, saves fertilizer, saves medicine, prevents soil compaction, and reduces ground temperature. What's more, it can effectively reduce the increase in air humidity caused by watering.
Drip irrigation under film: Drip irrigation under the film combines the common advantages of mulching and drip irrigation and is an effective measure to reduce the humidity in the shed. The method is to raise the ridge from the ground, then put the drip irrigation pipe in the center of the high ridge, and then cover the mulch.
Dust method and smog method medicine: When the medicine must be applied in the shed, if the conventional spray medicine is used, the humidity in the shed will increase, which is unfavorable to the control of diseases. Using the dust method and smog method, you can overcome the above drawbacks.
High-temperature dehumidification: After exposing in the morning, under normal circumstances, do not let out winds, and under the premise of not harming the cultivation and management of crops, the temperature should be increased as much as possible (for example, cucumber can be allowed to rise to 32°C). As the temperature rises, the humidity gradually decreases. When the temperature rises to the highest value of the suitable temperature required for cultivation and management of the crop, exhalation begins.
Cultivated wetting and dispersing: When the temperature of the greenhouse is high, the surface of the greenhouse is shallow, and the water evaporation from the topsoil is accelerated to reduce the temperature of the greenhouse.
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