Dongkui Yangmei low yield tree winter pruning points

Dongkui Yangmei is a good species of Yangmei in Zhejiang Province. However, due to the fact that tree nutrient regulation can not keep up in cultivation, low yield problems often occur. The specific performance is that the branches are strong and weak, and the resulting parts are shifted outwards, and the weak branches are numerous and the yield is reduced. With proper winter trimming, yield and quality can be improved. Winter pruning should do the following.
1. Revise the tree shape and promote the rational structure of the branch. Dongkui Yang Mei should promote the technology of sparse layer of small crowns, so that the main parts of the results are concentrated in the base, and the amount of the lower part of the canopy accounts for about 2/3 of the total yield of the strain. The strong and weak trees are strengthened by means of promoting the lower part and controlling the growth of the upper part. The angle of the upper branch group is maintained to be larger than that of the lower branch group to control or ease the growth of the upper branch, so that the tree body tends to be smaller and larger. Generally, the base opening angle requires a base angle of 60 degrees or more, a waist angle of about 60 degrees, and a tip angle of 80 degrees. For trees with strong and weak bodies, the upper branches can be leveled and the retraction of the upper branches can be increased to reduce the amount of upper branches. In the upper part, more flower buds are needed, and the results will weaken the growth of the branches, while the lower branches should have less flower buds to reduce the results. After the tree potential recovers, it will prompt a large number of results.
2. Control results outside the location of the East Kui Yangmei hi light, pruning is not reasonable will form the resulting parts of the shift. Therefore, in addition to pruning should be gently cut, put more branches and branches, and the use of uniaxial extension, but also "falling happy" to increase the amount of light in the upper crown; through the open angle and sparse outright branches, competition branches, Studied branches and other branches, increase the degree of lateral light penetration crown, improve the utilization of light; through the short cut of the temporary branches and pruning of the uniaxial branches to increase the results of branches within the canopy, improve yield and quality .
3. Control the amount of branches, reasonable results Yang Kui, the high germination rate, strong branching, young trees in order to enhance photosynthesis, the amount of branches is often less. However, after entering the result period, there will be too many branches, resulting in abnormal tree shape, lack of light, and the resulting rate of decline. Therefore, in the case of requiring mu (1 mu = 667 square meters, the same below) to produce 1000 ~ 1500 kg, the amount per mu should be controlled at 3000 ~ 3500, to ensure that a certain number of leaves per kilogram of fruit manufacturing and supply of nutrients, Excessive branches should be retracted in time.
The winter cut is best performed at the end of December, which is conducive to the renewal of the branches and the improvement of disease resistance. Generally use the "flat shear tip" approach. This method is simple and easy, and the branches are evenly distributed after cutting, and new branches and branches are easily formed. It is necessary to cut away the branches of pests, pendent branches, cross branches, and weak branches to improve the ventilation and light transmission conditions between the branches and make the crowns umbrella-shaped or planar.

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