Trimming red Fuji apple trees should pay attention to adjust the tree structure

Red Fuji apple tree transition from the early fruit period to the full fruit period, mainly to solve the tree structure adjustment, the transition of the results of the site and the results of the three groups of problems.

First, the adjustment of the tree structure 1. Control the tree height. Falling head and happy, when the distance is 4 meters, the tree height is controlled at 3 to 3.2 meters. When the row spacing is 3 meters, the height of the tree is about 2.5 meters. When falling, let the last branch or main branch of the happy place be formed and drop the head and complete it in two years. At the same time, a heel is formed on the opposite side of the falling branch to assist in the healing of the wound.

2. Density light. For the auxiliary nutrient which is reserved for more layers in the early fruit period, in addition to retracting and transforming into the result, the others who are too dense should be properly removed and retracted. Through gradual cleaning, the fruit trees can be divided into layers in the summer, and the distance between the leaf curtains of 50 to 70 cm can be maintained, and the ventilation and light transmission conditions within the crown can be improved.

3. Sparse care inside. For trees with excessively prosperous branches in the periphery of the tree crown, in line with the principle of “sparse sparseness, sparseness, sparingly sparseness, and sparse sparsity, and sparse sparseness,” the outer side of the tree canopy should be sparsely removed to balance it. Growing inside and out, so that Litchi development is full and robust.

Second, the results of the transition of the initial results of the results of the tree to support the results of the main branch, with the growth of the tree, temporary auxiliary branches gradually retracted, sparse, to the early fruit transition to the main results of the permanent auxiliary support This is the first transition of the result area. In the full fruit period, the transition from permanent subsidiary support to backbone branching results, which is the second transition of the result site. Pruning in the two transitions should pay attention to: control the temporary auxiliary feeding branches, try to increase the amount of results on the permanent auxiliary feeding branches, and cultivate the result branches on the branch.

1. Auxiliary branch control. The method of retracting results year after year is usually adopted. The treatment must not be rushed to avoid weakening the tree potential and affecting the output. When there is space, supplemental branches can be transformed into fruiting branches.

2. Results The cultivation of the shoots. As far as a tree is concerned, the lower branches should be more than the upper ones, and the internal branches of the crown should be more than the outer ones; for one branch, the tips should be small and small, the middle part should be large and numerous, and the rear part should be centered. The main branch is mainly composed of small, large, medium, and small sides on both sides and on the back; on the tree, the trunk sparse tree is improved, and the saplings are mainly medium and small with uniaxial extension. The fruitful period combines large, medium, and small. There should be 2 to 3 branch groups on one main branch. Between 1 and 2 main branches can be arranged between 2 and 3 large branches. The top tribe is happy and cultivated into a large result branch. There are about 15 large-scale fruiting branches in a tree, and the middle and small fruiting branches are empty. Free-spiral trees should be dominated by medium and small fruiting branches.

III. Arrangement of Resulting Branches 1 For trees with too many branches and too dense branches, one must choose to stay in the Zhuangzhi group to eliminate dense and weak branch groups, concentrate nutrients, and rejuvenate growth.

2. Properly retract the slender branches and short-cut the posterior 1-year vegetative shoots or medium-long test shoots to encourage the lower branches to widen and enlarge the resulting sites.

3. For branches with fewer branches and loose branches, multiple short cuts promote multiple shoots, increase branches, and occupy space.

4. To the large branch on the back, the dense cut-out, the excessive shrinkage, control the growth range; too strong to stay strong and weak, to stay straight oblique, re-shrink to the lateral growth of the branches , ease its growth potential.

5. If there are too many twigs in the crown, and if they are long, bald, or unbranched, remove the dense, strong, and bare branching branches first, and then reconcile the lateral growth, level, and growth. Shrink and shear in batches, promote branching on leaf twigs or axillary buds in 2 to 3 years, and gradually cultivate the resulting shoots.

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