Persistent rain, low temperatures, heavy snow and other adverse weather have a greater impact on vegetable production. Will cause a lot of vegetable crops hair root, root atrophy, leaves small, thin, yellow, frozen, resulting in a variety of diseases, is caused by greenhouse vegetables difficult to increase production of a major obstacle. If we want to maintain stable production of greenhouse vegetables, we must strengthen management after disaster weather.
Remove snow, strengthen the greenhouse skeleton and film according to the situation in time to take snow, snow shoveling, snow heating in the shed, pillar reinforcement and other measures to clear the snow on the shed to prevent the snow from collapsing the greenhouse. At the same time, we must continue to pay attention to preventing snowfall and windy weather. If a severely low temperature seedling is frozen, it must be replanted in time, and no seedlings must be replanted or replanted.
Continue to do a good job of antifreeze and warm work at night to continue to be multi-layer coverage, eggplant vegetables to cover more than three, pumpkin, ground Pu five-covered, to tightly cover the vents, sealed inside the shed interface, if conditions, it is best to Green sheds, middle ridges, and ridges cover some dry straw, which functions as a heat preservation in the evening and plays a dehumidifying role during the day. Heating is available under certain conditions.
Strengthen field management Immediately after the snow, clean up the ditches, remove accumulated water, and prevent the ablation of large amounts of heat while cooling, so as to prevent freezing damage and waterlogging. After the weather turns fine, vegetables in greenhouses will be timely to remove the coverings in the greenhouses, and timely ventilation in the greenhouse leeward; rainy weather should also promptly reveal the cover in the greenhouse, and ventilation before and after noon, exclude the shed Harmful gas hazards. After a continuous rainy or snowy days, it suddenly turns cloudy. When the ventilation is noticed, the plants are changed, and the wilting is found. Immediately cover with shade nets, non-woven fabrics, straw curtains, etc., recover and then uncover, wilt and then cover, so repeated, through 2- In 3 days, you can switch to normal management. If you leave it open, you can easily cause saplings. If you cover with shading nets, non-woven fabrics, and straw mulch, you must spray water in the shed. Open-pitched vegetables drained in time for the prevention of freezing damage can be spread straw to enhance insulation.
Strengthen the prevention and control of diseases and insect pests, and rationally apply fertilizers to diseases such as gray mold in greenhouses and damping-off of seedlings in greenhouses, and use fumigants for prevention and control to improve control efficiency. Scientific and rational application of phosphorus and potassium fertilizers, improve the cold resistance of vegetables. For cold- and freeze-damaged vegetables and seedlings, use 300 times liquid rice vinegar to spray the leaves, you can also use 0.2% potassium dihydrogen phosphate spray foliar, increase vegetable resistance. When the leaf color of cucumber and tomato is shallow, 75 grams of urea can be added. And use 1000 times of plant power 2003 for extra-root fertilizer, in order to enhance the cold resistance of plants, and promote the recovery of the crop as soon as possible.
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