In recent years, the cultivation area of ​​grape facilities has increased. Due to the large temperature changes in early spring, the temperature in the shed is prone to inversion, so that early budding varieties suffer freezing injury. The following measures can be taken to prevent and remedy the production. 1. Watering 1 day before the arrival of the cold current to increase soil humidity and air humidity in the shed, and adjust the temperature with wet conditions. 2. Smoke in the vineyard, smoke can reduce the radiation of soil heat radiation, effectively increasing the park's temperature. In the early morning before the arrival of the cold, lighted straws, weeds, sawdust and other smokestacks are ignited. Usually a cigarette is set per 100 square meters, and the smoke of each cigarette is maintained until dawn. This method can only be used in the open area outside the greenhouse. The wind can make the smoke float over the vineyard and cannot be used in the shed. The lit cigarette must be kept under special care. After dawn, all the water is poured out and cleaned. 3. Potassium dihydrogen phosphate solution can be sprayed after freezing damage to increase tree vigor and reduce cold current.
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