In winter, the temperature is low and the humidity in the greenhouse is high. How to properly ventilate peppers planted in greenhouses?

The buffer film is arranged below the air outlet, which can not only prevent weeds and dust on the grass curtain outside the shed from entering the shed and falling on the plant leaves, affecting the process of crop photosynthesis, but also prevent cold air from blowing directly on the vegetables below the air outlet, causing drastic changes in the surface temperature and dry humidity of fruits, resulting in "dry edges" of crop leaves and "dry skins" of fruits. Buffer film can protect the growth of crops under the vent. After the buffer film is installed, the cold air entering the shed is blocked by the buffer film on the back wall, which prolongs the distance that the cold air blows to the crops, makes the cold air and hot air in the shed have convection time, and makes the air blown to the crops equal to the temperature in the shed, thus avoiding the dry edges of the crops and the peeling of the fruits. In autumn and winter, the greenhouse is mainly managed by heat preservation, and the cold air blowing from the entrance will cause poor crop growth in 3-5 rooms near the entrance in the greenhouse.

Air leakage at some entrances, especially when people enter and leave the greenhouse, will cause cold wind to blow, which will lead to low plants and weak trees at the entrance of the greenhouse, and sometimes even cause cold damage to crops near the entrance. Winter ventilation mainly depends on headwind ventilation to reduce indoor humidity, 2-3 times a day. Ventilation is different under different weather conditions. In the sunny morning, the temperature reached 20℃, and in the afternoon, the temperature dropped to about 20℃ and ventilation began. Ventilation on cloudy days under the premise of heat preservation, ventilation for half an hour in the morning when the temperature is not lower than 13℃- 15℃, ventilation for 1-2 hours at noon when the temperature is high, and ventilation for about half an hour in front of the shed cover; It will be ventilated for half an hour at noon 12 on rainy and snowy days.

Because the temperature is very low in winter, the greenhouse will basically be tense, and the time for outdoor activities will not be too long every day. The humidity in the greenhouse is easy to increase, so it is prone to various diseases. Therefore, we should pay attention to the prevention and treatment of diseases, focusing on prevention. In addition to high temperature ventilation, we should also pay attention to reducing humidity. Water should be mainly drip irrigation, not overtime irrigation. And should be combined with drugs to prevent, common diseases are gray mold, cotton wilt and so on. Although the temperature is low in winter, we should pay attention to watering well. But watering in sunny days, mainly drip irrigation, should not be watered too much to avoid freezing injury. If it is not sunny, it is best not to water it to avoid unnecessary losses.