In autumn and winter, there are often heavy fog weather in the alternating season. This kind of weather has a great impact on greenhouse vegetables. Short illumination time is not conducive to the photosynthesis of vegetables and affects normal growth, resulting in a decline in yield and an increase in diseases. Here are the main points of management of foggy greenhouses.
Cover early cover, increase temperature. Immediately after the fog spreads, the grasshoppers will be uncovered. In the evening, the time for covering the tents will be delayed as much as possible to prolong the illumination time, which will be conducive to the increase of the indoor temperature. Shorter vegetables, timely covered with a small shed, such as spinach, rape, cauliflower, cabbage, etc., can be covered with a small plastic shed above the vegetable shed, play a role in warming insulation.
Clean the film and increase light. Wipe the shed film gently with a dry mop or a clean soft cloth to remove dust, grass clippings and other dirt on the shed film, increase the transparency of the shed film, increase the indoor light intensity, and facilitate the increase of temperature and manufacture of organic substances. And accumulation.
Science water, reduce disease. The moisture content in the fog is very large in the air, and the humidity in the greenhouse is also very high. At this time, try not to water or water, prevent the humidity in the greenhouse from increasing, and cause diseases.
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