A good way to protect walnut trees from cold

Burying the soil to prevent cold: for the 1-to 2-year-old young trees that can not survive the winter safely in the open field, bend the whole tree to one side and cover it with soil. this method is the most effective and reliable measure to prevent striping.

Cultivate soil to protect against cold: cultivate a mound within 30 centimeters of the base of the seedling to prevent frostbite on the rhizome and the graft interface. Remove the tree plate after the temperature picks up and stabilizes in the coming spring.

Painting white to prevent cold: the white painting of young trees can alleviate the temperature difference between the yin and yang side of the trunk, and the cold protection effect is better, which can be applied before the soil is frozen. The formula of whitening agent is: 0.5 kg of salt, 6 kg of quicklime, 15 kg of water, and then add an appropriate amount of adhesive and stone sulfur agent residue all over the branches of young trees.

Polyvinyl alcohol drying: brush the trunk of seedlings evenly with boiled polyvinyl alcohol. The boiling method is generally made with the ratio of "polyvinyl alcohol ∶ water = 1 ∶ 15 to 20". First boil the water to about 50 ℃, then add polyvinyl alcohol (do not wait for the water to boil before adding, otherwise polyvinyl alcohol can not be completely dissolved, the solution is uneven), stir with the addition until it boils, then simmer for 20 to 30 minutes, and then use it when the temperature drops to not hot.