How to deal with the disaster weather when growing celery in the greenhouse?

How to deal with the disaster weather when growing celery in the greenhouse? When celery is cultivated in greenhouse in winter and early spring, it often encounters disastrous weather such as continuous cloudy days, strong winds, snow, rainfall and so on, resulting in insufficient light in the greenhouse, lower temperature, increased humidity and aggravated diseases, which seriously affect the photosynthesis of celery and affect its yield and quality. Therefore, we need to pay attention to the management, prevent in advance and reduce the loss. Celery likes cold climate, and the suitable temperature for growth is 15-20 ℃. The growth of plants higher than 28 ℃ is inhibited, resulting in thickening of petiole, well-developed cuticular tissue and vascular bundles, and hollow petiole in serious cases, which seriously affects the quality. Therefore, in the case of not affecting the normal growth of celery on the temperature requirements, during the day as far as possible to open the grass, so that celery more light. Avoid leaving quilts or grass uncovered for several consecutive days. In case of windy days, pay attention to windproof, stop ventilation, seal the vents, compact the quilt or grass quilt, prevent it from being blown away by the wind, and avoid frostbite of celery plants. After the strong wind, tidy up the shed surface in time, take careful care of the injured plants, spray carbendazim or chlorothalonil and other drugs in time to prevent the occurrence of celery spot blight and leaf spot, and cooperate with Meibang "Tongzhu vein" humic acid foliar fertilizer to increase plant nutrition, improve plant resistance and accelerate plant growth and development. When necessary, apply "Root Duobao" humic acid fertilizer with water to promote roots and strong trees. When you encounter a blizzard in winter and the temperature is low, you should prevent frostbite at night and pay attention to covering and keeping warm. When it suddenly clears up after the snow, it is necessary to avoid strong light exposure to the celery plant soil, especially when the celery plant has been slightly frozen and some plants have fallen to the ground, we should pay attention to the fact that we can properly put down some quilts or grass quilts and gently open the tuyere. let the temperature in the shed rise slowly, and then resume normal management after the inverted plants stand upright. Under normal circumstances, foliar spraying 2% brown sugar + 800 times humic acid foliar fertilizer can accelerate plant growth. Watering and fertilization should be strictly stopped in continuous cloudy and snowy days, especially chemical fertilizers such as urea, so as not to quickly reduce the ground temperature and increase the humidity in the shed. At this time, you can choose dust or aerosol, or smoke in the shed to reduce fog. When there is a large amount of snow, it is necessary to remove the snow in time so as not to crush the shed. More celery planting techniques