How to prevent snow damage in greenhouses
1. Greenhouses are constructed to prevent heavy snow pressure. Greenhouses can be constructed under conditions. Steel and plastic frameworks should be used to ensure strength. Arched structures should be used to increase the support strength, and roofs should be graded to avoid snow. 2. Before the snowfall, pay attention to the inspection of the damage of the shed film, the firmness of the scaffolding, the insulation of the shed, the fastening of the laminating line, etc., and timely maintenance. Insulation measures are taken to prevent vegetable crops from freezing and early harvesting can be achieved. Control watering and top dressing to reduce humidity and avoid growth. If it is a thermophilic vegetable, it can be added with a layer of shed film or a small arch shed; if there is more cooling, the nursery sheds will be covered with straw awnings and covered with cold sheds. 3. Increase the number of columns and bracing when snowfall and clear the snow in time. In the case of continuous snowfall, a light curtain can be hung, or a high-power light bulb can be used to supplement the light and warm up. At noon, when the snow stops, it is necessary to carry out the air release. During the daytime snowfall, if the temperature is not very low, grasshoppers can be avoided. If the temperature of the shed does not decrease, the light-receiving time should be prolonged. When the temperature is low or snow falls at night, the grasshoppers should be dropped and covered with a shed film to prevent weeding. 3. Recover sheds that are overwhelmed by heavy snowfall after snowfall, and remove snow from the shed film to increase light intake. Strengthen management, promote seedling growth and rejuvenation, and carry out cultivating? i. Raise ground temperature and gradually increase greenhouse temperature. If there is a long period of rainy and snowy weather, pay attention to several days to gradually expose it after the snow is clear to avoid vegetable swiftling. For shed vegetables with weaker growth, spray 1% glucose solution and foliar fertilizer. If the disease occurs, it can be controlled with a fumigant. Disposable Suture Change Kits,Sterile Suture Change Kits,Disposable Sterile Dressing Change Kits,Disposable Suture Change Kits Sterilized Henan Xianghe Medical Materials Co., Ltd. , https://www.xiangheweicai.com