In recent days, snowfall has occurred in most parts of the country. Cold temperatures can easily cause freezing damage to fruit trees, affecting the growth of fruit trees and income of farmers. So, how should the orchard prevent freezing damage in the early days after the snowfall? A few days ago, the reporter interviewed Han Mingyu, a professor at the College of Horticulture, Northwest A&F University.
Remove snow in the snow to promptly clear the snow on the fruit tree trunk to prevent bending and breaking of branches caused by excessive snow. If the fracture has already occurred, a new high-fat membrane should be sprayed on the fracture of the fruit tree to prevent wound rot and virus infection, so as to promote the restoration of fruit trees.
After the orchard smokes and removes snow, it can be used to raise the temperature in the orchard. Smoke for 2 to 3 consecutive nights, can play a good anti-cold and anti-frost effect. "Branches, branches, roots of fruit trees and roots of fruit trees are sites that are prone to frost damage. Fruit farmers must pay special attention," said Han Mingyu.
After the fruit trees are coated with white snow, they should use whitening agent to whiten the trunk and main branches in a timely manner so that the temperature of the tree body can be changed stably, preventing freezing, preventing sunburn, and killing pathogens, eggs and adults in the trunk. Han Mingyu reminds that it is also possible to use bales of straw in the trunk or main branches of fruit trees instead of whitening.
Supplementing irrigating and freezing water For those farmers who fail to seal frozen water before winter, the fruit trees should be filled with frozen water in time before being frozen. This will not only promote the growth and development of fruit trees, but also keep the ground temperature relatively stable during the winter, thus reducing the freezing damage.
Trimming after pruning pruning after pruning is a necessary measure after fruit trees are frozen. Through pruning, the tree body can be made to grow new and restore its vigor. If the branch is frozen, it is necessary to cut off the frozen shoots; if the main branch is frozen and the skin is cracked, it is necessary to saw out the frozen main and side branches. Han Mingyu reminded farmers that on the frozen shoots, the junction between frozen and unfrozen parts was not obvious. After spring temperature rises, the main, side branches and branch shoots should be cut off in time. To cut off from the apparent junction of freezing, cut the mouth with a lime sulfur mixture for protection.
Han Mingyu, who sprayed pesticides to combat cold, said that spraying low-concentration ethephon or naphthaleneacetic acid and qingshen water solvents before low temperatures could effectively suppress flower buds and improve cold resistance. Farmers can spray 0.3% potassium dihydrogen phosphate plus 0.5% white sugar at noon during the day before low temperature and spray 2 or 3 times, which can be used as antifreeze.
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