How to exhaust air in the haze weather film greenhouse?

In recent days, the continuous haze climate has not only brought harm to health, but also has an unlucky effect on the growth and development of vegetables in the film greenhouse in winter. In winter, as the primary production stage of vegetables in thin-film greenhouses, it is very important to manage vegetables well in a haze climate.

The recurring haze climate in winter will directly lead to lack of sunlight and high humidity in the greenhouse, which will seriously affect the temperature storage and heat preservation ability of the solar greenhouse. It is unfortunate for the growth of vegetables. Secondly, high air humidity will increase the incidence of vegetables. What should I do? What do you need to pay attention to?

The haze climate should be ventilated as little as possible and increase the light: There is another effect that is simply ignored by us-there are more pollutants in the air in the haze climate. Although these pollutants are very small, they will block the stomata when they fall on the leaves. Affect the respiration of vegetable leaves, block the entry of carbon dioxide, and then affect the growth of vegetables. When encountering a haze climate, the timing of vegetable ventilation in greenhouses should be appropriate, and try to choose not to ventilate the day.

The ventilation time of the greenhouse should be adjusted from 8 o'clock in the morning to around 2 o'clock noon of the same day (this time point has the most subtle impact of haze). In addition to timely compensation for the carbon dioxide concentration in the greenhouse, it is also conducive to plant growth and prevent air pollution. Contaminants fall on the leaves. During the haze days, as long as there is no snow in the climate, the greenhouse thermal insulation can be opened earlier in the morning.

Cover up later in the afternoon to make the plant absorb the scattered light. It is not recommended not to expose the quilt for more than 3 consecutive days. It can be appropriate to compensate the light and prevent diseases for the greenhouse vegetables in foggy and hazy days. Cultivators can choose to clean the film in a sunny position to increase the light transmittance of the film. At the same time, timely clean up the old leaves and diseased leaves on the plants in the shed to increase the scattered light between the plants.