Trim management and prevent sunburn on walnut trees

The burning of walnut trees is also referred to as day-burning, which refers to the burning of organs and tissues that occur during the growth and development of walnut trees due to the intense sun exposure of the trees and beyond the tree's ability to adjust to temperature changes. It is more serious in summer in drought years. The sunburn of walnut trees occurs in the walnut gardens on the terraces of sunny slopes in the front of the mountain, in the walnut gardens of the east and the west, and in the walnut gardens with poor water and fertilizer conditions and poor soil conservation performance. The sun-burn prevention measures for walnut trees include:

When pruning and pruning is reasonable, keep auxiliary branches on the sunny side of the tree body, especially stay on the branches on the southwest side, leave more internal pods and leave less pods, so as to avoid branches and fruits being exposed to the direct sunlight.

Strengthen comprehensive management 1 Orchard lines between the orchards, trees cover grass, water retention, enhance the ability of the soil to mediate moisture. 2 After a fall, the deep fall of the garden will promote the robustness of the fruit tree roots, increase the water absorption range and ability of the root system, and maintain the Balance between the growth of the shoot and the root system. 3 In the growing season, timely irrigation and water spraying, it is best to water once every half month after the fruit expansion period. Timely prevention and control of pests and diseases, protection of leaves, increase tree vigor, try not to make the plant drought. In addition, the incidence of sunburn in the walnut garden where Bordeaux is sprayed during the growing season is low. 4 Planting green manure in the orchard or mulching straw on the surface of the orchard, combined with multiple watering in the high temperature season to reduce the surface and tree temperature, can effectively prevent the occurrence of sunburn.

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