The temperature is getting higher and higher in summer, especially in the greenhouse project, so I remind you to release air effectively to ensure the smooth "inhalation" of glass greenhouse, layer by layer. When the shed is closed for 1 hour or when the temperature reaches 20 degrees, a slight breeze needs to be released, with an air outlet width of 5cm, to improve the photosynthesis of crops and discharge water or harmful substances from the body. When the temperature inside the greenhouse rises to the high temperature required for crops, secondary air is released to slowly reduce the temperature to a range suitable for the growth and development of vegetables in Taiwan.
When there is no wind or a slight northeast wind (or southeast wind), the temperature at the west end of the glass greenhouse is generally 2-3 degrees higher than that at the east half, while when the wind is strong, the temperature at the east end is 2 degrees higher than that at the west end. When there is a northwest or southwest wind, the temperature difference on both sides of the object will be above 3 degrees, and the greater the wind, the greater the temperature difference. Due to different on-site conditions, the fresh air should be managed in segments.
The thermometer setting should be effective. The key for farmers to release wind is based on the loading temperature in the thermometer. Its accuracy directly affects whether vegetables are in a natural environment suitable for growth and development. Therefore, the glass greenhouse manufacturer suggests symmetrically setting three thermometers on the east side of the arch shed, then taking the average value to reduce errors, and placing the vegetable bud eye 10 centimeters above the thermometer. After watering, the humidity in the arched shed environment increases strongly and requires immediate dehumidification. Watering should be done at noon that day, with the air outlet moderately closed and the air outlet opened early in the morning to increase natural ventilation. The actual operation for 2-3 days can quickly reduce the environmental humidity of the arch shed and reduce diseases.
