Picking apples at MINUS several degrees

The lowest cold tolerance temperature of apple trees is about -40 degrees, which is good in cold tolerance and can be wintered in the open air in most parts of China. If apple saplings are used, their cold tolerance will be slightly worse, and they need to be protected in winter to avoid frostbite. Before winter, you should pour frozen water, cover it with plastic film to raise the surface temperature, or cover it with straw to keep warm.

1. What is the lowest temperature for apple trees to resist cold? Apple trees are very hardy. If it is an adult tree, it can endure the low temperature of -40 degrees, and its cold tolerance can safely overwinter in most parts of China. If it is a seedling or an unformed plant, the cold tolerance will be slightly worse, and the cold tolerance of plants in different growth States will be different. If apple trees grow healthily, there will be fewer pests and diseases in the growing period, and their cold tolerance will be stronger. Plants with weak growth need to do a good job of cold protection after winter to prevent the apple tree from being frostbitten when the cold current comes.

Second, how to prevent apple trees from freezing 1, watering with frozen water: In order to prevent apple trees from frostbite after winter, it is necessary to water with frozen water once before freezing in winter, which can effectively protect the roots of apple trees and will not cause freezing damage after freezing in the soil. 2. Covering with plastic film: If it is an apple tree seedling, it needs to be covered with plastic film to raise the surface temperature. Increasing temperature and keeping moisture can effectively protect plants from freezing injury.

3. Shallow tillage and grass mulching: Before the soil is frozen in winter, loosen the soil under the canopy and spread a layer of straw, and then cover it with soil, which can improve the heat preservation and cold resistance, thus making the soil more breathable.