Branches are too short and pull branches too fast
Premature drawbacks in the production of apples are more disadvantageous than the benefits. The main performance is the unfavorable expansion of the crown; the second is the prone to branching, unfavorable single-axis extension of the branches.
By adopting a method of delaying the pulling of the branches, on the one hand, the effective extension of the branches can be maintained and the canopy can be expanded. On the other hand, when the branches are erected and grown, only the medium and short branches are promoted, and the growing branches are rarely grown, which favors the uniaxial extension of the branches. In the production of the Red Fuji apple, the large branch axis used for cultivating the skeleton of the tree generally starts to pull the branch when the branch is about 1.5 meters long, and the temporary auxiliary branch starts to pull the branch when the length is about 1 meter, and the effect is very satisfactory.
For branches that have been opened, if there are large branches, they should be removed to focus on the growth of the nutrient supply shoots to facilitate the branch axis expansion, while dredging large branches, can promote the development of short and medium branches, effectively increasing the results The number of sticks leads to an increase in production.
Unreasonable time for pulling sticks, serious strips
Pulling branches can be carried out during the growth period, but the timing of pull branches is not the same, and the effect is quite different. In the spring, since the shoots are in a vigorous growth period, after the branches open, the apical dominance is easily converted to the advantage of shoots, which is prone to strips. After the occurrence of the bar-breaking phenomenon, the branches will be disorderly and the nutrients will be consumed in large amounts, resulting in the failure of pulling the branches. In August-September, when the new shooter stops, he will open an angle and take fewer bars. Therefore, the ideal pull time should be from August to September.
If the branches are pulled in the spring, it is better to pull the shoots on the side to remove the buds on the back to reduce the occurrence of strips. For those that have already appeared, if they do not affect the thickening of the branch axis and prolong growth, they can be modified by pulling and sagging. If they affect the thickening of branches and prolong growth, they should be promptly removed.
Regardless of the primary and secondary, a random connection
There are two types of shoots in the sapling tree: one is to cultivate the skeleton of the tree, which is a permanent branch, and the other is an auxiliary tree, which is a temporary branch. Permanent shoots should be dominated by extensions to enlarge the crown. Temporary shoots should be transformed into the resulting branches as soon as possible to improve the yield in the early stages. Therefore, the angles of their opening angles are not the same and the permanent branches should be maintained. Small angles extend, while temporary branches should extend at a large angle. However, it is not enough to pay attention to this issue in production.
For the primary and secondary reasons unknown after production, the permanent branches should be properly raised to maintain the growth advantages of permanent branches and ensure that the long tree results are correct.
Open angle size does not match the tree
The shape of the tree is different, and the opening angles of the branches are different. Generally, the more open the angle of the branches is, the stronger the inhibitory effect on the branches will be, and the more favorable the growth of the thicker branches will be. In apple production, according to the different planting densities, the applied tree types are mainly two kinds of modified spindle type and free spindle type. The former is applicable to less than 45 strains per acre, and the latter is suitable for more than 45 strains per acre. The former is permanent. Branch axis opening angle is more than 90 degrees, branches can be flattened, the latter permanent branch axis opening angle is more than 90 degrees, branches should be appropriate sagging. That is, the greater the planting density, the more open the angle of the branches, but the production of up to this requirement, resulting in excessive growth of dense planting branches, branches tend to occur, causing great inconvenience to the future management.
For this phenomenon, the method of pulling the branches again can be used, and it is necessary to increase the opening angle of the branches.
Pull branches are not open, the effect is not ideal
The most important factor in the pull branch is that the base corner should be opened well, the base corner should be in place, and the branches should be pulled through to make sure that they do not bend. Once there is a bend, they will be stripped at the bended position and affect the pull branch effect. However, branches are not produced during production, and there are more curved branches. Therefore, the branch must be meticulous, and strive to pull it in one place. Do not leave hidden problems for future management.
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