Teacher, can a large number of cherry varieties survive the winter safely on the land in the northeast of Jilin Province?
The flower buds of big cherry began to germinate when the daily average was above 15℃, and began to blossom when the daily average was above 15℃. New shoots grow fastest above 20℃, and fruits mature after 50-60 days at 20-25℃. When the average temperature of the day is lower than 5℃, it begins to shed leaves and enter dormancy. Big cherries are not frost-resistant, and if there is cold in spring, it is easy to freeze. The tolerance of big cherry to low temperature is different in different stages from germination, flowering to young fruit growth, such as -5.5℃ ~- 1.7℃ in bud stage and -2.8℃ ~- 1. 1℃ in flowering and young fruit stage. If the temperature drops sharply, the flower buds will be frozen by 96-98%, while when the temperature drops slowly, only 3-5% of the flower buds will be frozen. In addition, the freezing degree of big cherry is directly related to the nutrient storage in big cherry trees. Therefore, strengthening the management level of nutritional storage of big cherry trees is also an important measure to prevent freezing injury.