After the frozen frost on the trunk of a walnut tree, it is necessary to take anti-freezing measures as soon as possible so as not to affect the output in the following year and lead to the occurrence of disease. The frost-damaged walnut trees of Grades 4 to 5 should be immediately applied to prevent the occurrence of serious frost injury and rot. White trunk work. At the same time, clear the snow around the trunk. After the ground temperature rises and the surface is thawed, the trees below 4 years are centered on the trunk and a plastic mulch is laid for about 1 square meter.

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