Three anti-freezing methods of planting grape in greenhouse

In recent years, the protected cultivation area of grape has increased. Due to the great change of air temperature in early spring, temperature inversion is easy to occur in the greenhouse, which makes the early sprouting varieties suffer frost injury. The following measures can be taken to prevent and remedy. 1. Watering one day before the cold spell, increase the soil moisture and air humidity in the shed, and adjust the temperature with humidity. two。 Smoking in the vineyard, smoke can reduce the radiation emission of soil heat and effectively increase the temperature in the garden. Can be in the early morning before the arrival of the cold snap, ignite a certain humidity of straw, weeds, sawdust and other cigarette piles, usually every 100 square meters set up a smoke pile, each stack of smoke to maintain before and after dawn. This method can only be used in the open area outside the greenhouse, and the wind can make the smoke float over the vineyard and cannot be used in the shed. Lighted smoke piles must be taken care of by special personnel, and all of them will be extinguished and cleaned up with water after dawn. 3. After the occurrence of frost injury, potassium dihydrogen phosphate solution can be sprayed to enhance the tree potential and reduce the injury of cold current.