In winter, many greenhouses are equipped with shutters. How can we prevent the occurrence of "flash sprouts" in the greenhouses that use roller shutters? 1. Repeatedly pulling the straw curtain: When the sky is suddenly clear after continuous rain and snow, the straw curtain can be pulled up for 5 minutes and then put down. After 5 minutes, pull it up again. This repeated operation will gradually increase the interval time, allowing a small amount of light to enter. . Generally, 3 to 5 pulls are performed. The vegetables in the shed will adapt to the suddenly changed environment. The leaves of the plants will stretch normally, and natural wilting will no longer occur. If symptoms of mild wilting are found, spray warm water can be used to increase soil moisture and reduce leaf water evaporation, thus alleviating sprouting. Second, part of the drafting curtain: when the continuous rain and snow suddenly turned clear, first to cover the grass on the shed to pull up 1/3 or 1/4. Do not pull up all the straws, so that all the seedlings are exposed to sunlight. After a period of time, gradually pull the straw up again, and no sprouting will occur. Third, early drawing drafting curtain: If the temperature outside the shed is not very low, drawing curtains can be drawn earlier. Requires careful observation of weather changes. If it is found that the weather is going to be sunny and the temperature outside the shed is not very low, the straw can be pulled up before the sun shows up, so that the drafting curtain is pulled out after the sun comes out and vegetables sprout. The probability is much smaller. Fourth, with shading nets to block: In the drafting of the curtain after the draft, shading nets to block more than 10 minutes, can effectively avoid the drafting of the curtains due to the rapid emergence of flashing vegetable phenomenon. V. Spray liquid fertilizer recovery: After the above measures are taken and the flash seedlings are still heavy, spray Tianda 2116 or sea pheromone, green blood venous liquid fertilizer, etc., to supplement water and nutrients, increase vegetable vitality, and promote recovery.
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