In summer, the weather temperature is high, will lead to high air temperature in the greenhouse film, the use of the greenhouse film, it is necessary to ventilate the greenhouse film at the right time, the following introduces some precautions for the ventilation of the greenhouse film.
1. Eliminate moisture, discharge the moisture in the shed, supplement the carbon dioxide in the shed, add raw materials for the smooth progress of photosynthesis, and at the same time discharge sulfur dioxide, carbon monoxide and other toxic gases in the shed early. First ventilation 1 hour after pulling the shed open in the morning. Supplementation of carbon dioxide is usually carried out in two separate ways, usually on sunny days.
2. In order to control the conditions for bacterial growth, the vent must be opened in time after the first half hour of ventilation, so that the temperature in the shed quickly rises to about 30-35 °C for one hour, reduce the temperature, and create environmental conditions that are not conducive to the growth of pathogenic bacteria. A second air release is required.
3. When venting the air, vegetable farmers should open the vents at both ends of the greenhouse slightly smaller. Due to the light absorption of the two gables of the greenhouse, the temperature at both ends of the greenhouse rises slowly, resulting in the temperature at both ends of the greenhouse being lower than the middle temperature of the greenhouse.
4. When the greenhouse needs ventilation, pay attention to avoid the film is not neat, and the roll film should be more careful.
5. Pay attention to cleaning the garbage on the surface of the shed film to avoid sharp objects scratching the film.
6. In summer, it is a high temperature season of our year. Do a good job of sun protection of the shed film. If the bracket is made of metal, more attention should be paid to the damage caused to the film by the metal temperature.
7. In winter, do a good job of antifreeze protection of a film. Lower temperatures will make the film prone to cracking.
8. If a film has small cracks or passes through small holes, it should be repaired in time, and do not feel that there is no big problem. Avoid more influencing cracks in the shed film.
9. When cleaning the film, try to choose to use a soft brush, the water pressure should not be too large when cleaning, and the data should be cleaned by analyzing the development of different areas one by one.
10. If the shed film is loose, tighten it in time. The loose shed membrane is prone to rupture under the action of strong winds.