How to ventilate the hot (sweet) pepper cultivated in energy-saving greenhouse?

When hot (sweet) pepper is cultivated in greenhouse, the ventilation should be flexibly controlled according to the growth characteristics, growth status, ecological characteristics of greenhouse, cultivation season and weather conditions, and the ventilation time and opening size should be determined according to indoor temperature and humidity. In cold season and sunny weather, the room temperature should be kept at 30 ~ 32℃ before 14: 00, and ventilation can only be carried out when the indoor temperature reaches 30℃ and continues to rise. The size of the vent should be kept at 30 ~ 32℃, and the indoor temperature should not rise or fall.

Ventilation should adhere to early morning and night ventilation, and it is absolutely forbidden to suddenly open the air outlet at the beginning of ventilation, so as not to cause the indoor temperature to drop rapidly and cause the phenomenon of "flashing seedlings". 14: 00, gradually increase the tuyere to cool down. By adjusting the size of the tuyere, the indoor temperature is maintained at 16 ~ 17℃ at sunset in the evening. At night, it shall be maintained at 16 ~ 20℃ in the first half of the night, and at 12 ~ 14℃ in the second half of the night, and the minimum temperature shall not be lower than 10℃. In this case, ventilation can be maintained all night until about 8: 30 the next day. On cloudy days, the temperature should be maintained at 14 ~ 18℃, and the temperature at night should not be lower than 10℃. When the indoor humidity is high, the ventilation time can be longer and the temperature can be lower. When the outdoor temperature is high and the soil temperature is high in summer and autumn, the ventilation volume can be appropriately increased and the ventilation time can be extended so that the daytime temperature is not higher than 32℃. Special attention should be paid to increasing night ventilation and reducing indoor temperature and humidity, so that the night temperature is not higher than 20℃ and not lower than 10℃. When the seedlings grow vigorously, the temperature can be appropriately lowered to 8 ~ 16℃ at night, and when the plants grow weakly, the temperature can be raised to 18 ~ 20℃ at midnight to promote the vegetative growth of plants.