The so-called flash seedlings refers to the fact that vegetable seedlings suffer from cold wind or low temperature for a long time. When the temperature rises suddenly, the leaves of plants lose water. After emergence, the leaves of the seedlings were wilting and drooping. After restoration, the edges of the leaves became yellow or dry, and the whole plant died in severe cases. In the past, winter shed vegetables often appeared flashing after turning cloudy and clear. At that time, it was only necessary to carry out “exposing flowers and spraying warm water†(opening the covered grasshopper at a distance of one room, spraying warm water of about 15° C.). Most of the winter-warm greenhouses now use shutters. Obviously, greenhouses using shutter machines cannot use this method to prevent sprouting. So, how to deal with vegetable flashers using a greenhouse with shutters? To this end, the author summarized some tips, and here I will introduce five points for reference. I. Repeatedly pulling the straw curtain When the rain suddenly shines after a continuous rainy weather, the straw can be pulled up for 5 minutes and then put it 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 curtains suddenly turned cloudy after continuous rainy days, first covering the grass curtains on the sheds to raise 1/3 or 1/4. Do not pull all the straws up so that all seedlings are exposed to sunlight. When the sun is too strong, you can open the front face of the shed first, because the light entering from the front face of the shed is mostly diffuse light. After a certain period of time, gradually pulling the turf curtain up will not happen. Flash seedlings. Third, early drawing draft curtain if the temperature outside the shed is not very low, drawing draft can be drawn early. 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 the drafting curtain drawn in the first shading net to block more than ten minutes, can effectively avoid the drafting of the curtain due to pull too fast vegetable flash phenomenon. V. Spray Liquid Fertilizer Recovery After the above measures are taken and the flash seedlings are still heavy, they can be sprayed with Shuofeng 481 or sea pheromone, green blood venous liquid fertilizer, etc. to supplement the water and nutrients, increase the vitality of the vegetables, and promote their growth. Non-locking Plate Screw Series Upper Limb Orthopaedic Implant,Narrow Dynamic Pressurizing Plates,Mild Steel Plates ,Femoral Gooseneck Screw Jiangsu Health Medical Technology Development Co., Ltd. , https://www.medicalhos.com