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What is the task of pruning walnut trees?
The fruiting tree mainly refers to the big trees in full fruiting period whose crowns have basically formed for more than 15 years and began to bear a large number of fruits. The characteristics of this tree are that the annual growth of new shoots is obviously shortened, mostly10 ~ 20 cm; The fruit-bearing capacity is rapidly improved, and the high-yield period can last for about 30-50 years. If the management of soil, fertilizer and water and pruning are strengthened, a large number of fruiting periods can be extended, and some of them can reach 100 years after repeated and timely updating. The outer branches of the crown are dense due to the increase in number, and the inner branches are gradually dried up due to poor ventilation and light transmission. If pruning can't keep up, the fruit parts will move out quickly and the fruit volume will decrease, which will affect the fruit yield and quality.

Therefore, the pruning task is mainly to clear the messy branches, straighten out the subordinate relationship and hierarchical structure between the backbone branches and the fruiting branches, improve the canopy illumination, control the outward movement of the fruiting parts, and ensure the high quality and high yield of the tree. The specific pruning contents include cultivating, pruning and updating the fruiting branches as required, processing and transforming the irregular branches such as cross branches, three branches, overlapping branches, parallel branches, upright branches and long branches, retracting the auxiliary branches, back branches that have been slowly released for many years and slender and drooping weak branches, and thinning the male flowers, dense branches, pests and diseases, and dead branches.