How to prevent Frost in flowering period of Big Cherry

Irrigation before sprouting and delaying ground irrigation before sprouting and flowering can delay the sprouting and flowering of cherry. It can effectively reduce the ground temperature and avoid the harm of frost. When the temperature drops to about 2 °C at night, light the haystack to ensure that the whole orchard is covered with smoke, and the smoking time is best maintained until the sun comes out the next morning. About 7 days before the peach blossoms, cover the bamboo pole with plastic film, which only covers the top of the peach garden to ensure ventilation. The film was uncovered about 2 weeks after fruit setting.

There are two kinds of freezing injury of big cherry, one is early freezing injury, which occurs earlier, mostly around the dormant period of Spring Festival, mainly caused by extreme low temperature, resulting in flower bud damage or dead trees. Second, the late frost injury mostly occurs after the big cherry sprouts to the young fruit stage, which is caused by the sudden drop of temperature or frost after the temperature rises, resulting in the damage of flowers or young fruits. The early freezing injury is closely related to the late management and tree nutrition of big cherry. If the management is fine and the tree nutrition is good, the freezing injury will be mild, otherwise it will be serious. The frost injury of late frost is closely related to the site conditions of big cherry, the cold berth and low-lying land are easy to occur, and the mountain or sloping land with unobstructed air is not easy to occur.

How to prevent Frost in flowering period of Big Cherry

The main results are as follows: (1) Irrigation before sprouting and delaying ground irrigation before sprouting and flowering can delay the sprouting and flowering of big cherry and delay the germination of big cherry trees for 3-5 days. It is best to use well water irrigation, which can more effectively reduce the ground temperature, delay sprouting and flowering, and avoid the harm of frost.

(2) smoke and prevent frost. According to the local weather forecast, in the night of frost, crop straw or wheat bran stacks are piled at a certain distance in the big cherry orchard. When the temperature drops to about 2 °C at night, light the haystack to ensure that the whole orchard is covered with smoke, and the smoking time is best maintained until the sun comes out the next morning.

(3) erect frost-proof greenhouse. In early spring, a stone pillar was buried at an interval of about 4 meters between the rows of the big cherry. The top of the stone column was 20-30 cm higher than the big cherry tree. The bamboo pole was used as the crossbeam between the stone columns and fixed with ropes. About 7 days before flowering, the peach is covered with plastic film on the bamboo pole and tightened around with ropes to prevent it from being blown away by the wind. The plastic film is not covered around, but only above the peach garden to ensure ventilation. The film was uncovered about 2 weeks after fruit setting.