Greenhouse regulation

First, temperature In general, the temperature in the shed is high in the east and high in the west in the afternoon. Therefore, when the ventilation is performed, the middle vent must be opened first, then the east side must be opened, and finally the west side must be opened; when closing, the east side should be closed first and the west side must be closed. Finally, the middle. Ventilation is allowed to take account of weather changes and wind direction. When there is a wind, it is necessary to open the air outlet first, and then open the air outlet. The air outlet must be opened slightly and the air outlet must be opened. The amount of ventilation should be determined according to the specific needs and adjusted at any time. In case of cold weather, it is appropriate to postpone the ventilation time, and the closing time should also be appropriately advanced. Within a day, keep the temperature in the shed at least 20°C for more than 8 hours. In case of strong low temperatures, warming and heat preservation measures should be taken at night. When the outside temperature rises to 15°C, it can be ventilated overnight.

Second, the humidity due to the shed film is not airtight, shed, outside the temperature difference, resulting in the film inside the knot droplets, affecting light and crop growth. Therefore, the humidity management in the shed should be mainly based on dehumidification, and measures such as ventilation and other dehumidification measures should be taken to control the humidity so that the humidity in the shed can be maintained at 60% to 80%. After rainy weather and watering, it is necessary to increase ventilation to achieve the purpose of dehumidification.

3. The space in the gas shed is limited. Due to the reasons such as fertilization and fighting drugs, the harmful gas in the shed will accumulate and the carbon dioxide content will decrease, which will affect the growth and development of greenhouse vegetables. Therefore, before ventilation every day, we must first open a small gap in the middle of the greenhouse, release the turbid air and toxic gases, exchange fresh air. At the same time, it is necessary to constantly measure the carbon dioxide content in the shed. When the carbon dioxide content in the shed is insufficient, replenish it promptly.

Fourth, light illumination is the driving force for growth and development of greenhouse vegetables. Therefore, it is necessary to frequently scrub the shed film to increase the lighting in the shed. When the light intensity, light quality, and illumination time in the booth are insufficient, artificial light can be artificially lighted using incandescent lamps.