How should peach trees spend the winter? How many degrees below zero will freeze to death?

1 month is the coldest month, and it is in the freezing period of the 29th, 39th and 49th lunar month in 2020. Although peach trees can resist the cold weather of MINUS 20 degrees, when there is no rain, snow and drought in winter, when the underground water content is lower than 45%, the stress resistance will be greatly reduced. If the soil water content is low, the gap in the soil will be large and the air permeability will be too good. Strong cold air will drill into the ground and freeze the roots. In severe cases, peach trees will die, especially young trees planted in autumn, or peach trees will lose their leaves too late. It is more important and necessary to prevent freezing damage!

The anti-freezing measures are as follows: 1. Winter irrigation: This is one of the best ways to prevent freezing. Especially in the peach garden where base fertilizer is applied in autumn, more attention should be paid to watering in winter. (1) Taoyuan, which does not apply base fertilizer in autumn, must be watered in winter when the soil water content is lower than 45%, and if there is no water, it should be watered once after the temperature rises to make up for the shortage of soil water content. It is best to freeze early and water in the afternoon, and the temperature will reach 3~7 degrees during the day and below zero at night and in the morning. Through freezing and thawing, frozen soil layer will be formed to prevent cold air from invading the roots. As long as the root water conditions are met and the stress resistance is enhanced, peach trees can safely overwinter. (2) No matter the peach orchards that dig ditches and apply base fertilizer in autumn, especially the peach orchards with a lot of litter or stubble in the ditch, they should be watered in time to make the floating soil solid and prevent a large amount of cold air from directly soaking into the ditch and damaging the roots. This is the most serious freezing injury in Taoyuan, and the death rate can reach 70%. Should attract the attention of peach farmers! When watering, avoid all-weather watering when the temperature is below zero, so as to avoid freezing day and night, and make the roots and stems of peach trees on the ground frostbite and rot.

Second, painting white to prevent freezing: under the influence of extremely cold weather, especially the high temperature during the day and the high temperature at night, it is easy to cause frostbite in the trunk cortex in the southwest. Whitening is one of the best anti-freezing methods. 10 part of water, 2 parts of lime, 2 parts of sulfur mixture, 0.4 part of salt and 2 parts of local materials are evenly mixed and dried, and the higher the better. It can not only kill pests and diseases, but also prevent freezing injury. A variety of formulations can be used to dry the coating. Third, the trunk is tied with dry straw or grass to prevent freezing injury. Especially young trees have poor resistance to stress, which should be paid more attention to. When the temperature rises in early spring, the burning can be lifted and the overwintering pests lurking in the straw can be eliminated. (1) Young trees planted in autumn are best cultivated in the sun and buried tightly. (2) For the roots of big trees, a 30 cm mound can be cultivated to prevent frostbite and gum rot at the roots.