First, take heart. Topping can control the growth of shoots, increase the number of branches and branches, accelerate the expansion of the crown, and promote the conversion of branches to the resulting branches, which is beneficial to the early results of young trees. Picking up the heart is divided into two kinds: the early picking of the heart and the picking of the growing season. Early picking is generally performed within 7 to 10 days after flowering. In the growing season, picking up the heart is generally conducted from late May to mid July, and 30 to 40 centimeters of picking is reserved for new shoots, which is mainly used to increase the amount of branches. If the sweet cherry's tree vigor is more exuberant, after the picking, the auxiliary shoot is still very prosperous, and it can also be used for continuous picking 2 or 3 times, which can promote the formation of short branches and early results.
Second, twist tip. The twisted shoots of sweet cherry tended to moderate, and accumulated more nutrients in the upper part. The top buds and lateral buds could obtain more nutrients, which was conducive to flower bud differentiation. Even if the flower buds cannot be formed, the flower buds can be formed in the second year. When the tips of the twisted shoots are not lignified from late May to early June, erect branches, competing branches and introverted temporary branches will be placed around 5 cm from the base of the branches and gently twisted by 180 degrees to make the xylem. There are some cracks in the phloem but they are not broken. The sprained part of the year can heal completely. Because the tip of the shoot is too early, the shoot is not semi-lignified, and the tissue is tender and easy to break. Because there are few leaves, it is not conducive to the formation of flower buds. If the tip is too late, the shoots are already lignified and brittle and hard to twist. If they are too hard, they are easily broken and cause dead branches.
Third, pull the sticks. Pulling branches can solve the problem that can not be solved by winter shears, in order to reduce the pruning during winter pruning. Generally, after the harvest in June, the branches are opened and the trees respond mildly. It is not easy to carry branches on the back. General use of straw rope, hemp rope or plastic rope and other things, tied to the end of the stake buried in the ground, the upper end of the hook on the wooden hook, or pad on the waste cloth, waste rubber and other objects, will pull the branch open angle. The main branches and lateral branches of the branches are preferably 60-70 degrees, and the other branches can be 80-90 degrees. When pulling the branches, large branches should be prevented from splitting, and the support points of the branches should be prevented from being too high. The central part of the branches that are pulled should be arched upwards, resulting in a small waist angle and a phenomenon of strips. Pull the pull rope must be buried in the tree, so as not to affect the line between operations. After a growing season, the angle is basically fixed, and then pull the rope.
Fourth, the branches. After the cherry is harvested, the branches can be adjusted to adjust the structure of the tree, improve the ventilation and light transmission inside the crown, and promote flower bud differentiation, growth and balanced tree vigor in the later period. This pruning technology has a significant effect on the growth of strong trees. According to the survey, the aged sweet cherry orchards that are pruned after fruit picking can increase production by 1 time. Thinning is generally performed in the middle or early July. For strong and vigorous branches that affect the internal ventilation of the canopy, which are severely light and have no reservation value, they can be removed from the base. For large branches that only affect the canopy's local lighting conditions, but still have the ability to produce results, the retraction can be performed at the larger branches with larger branching angles and growth capacity. In the specific treatment, shrinkage is used for the lower branches (finger branches), and sparse shear is used for the higher branches (finger branches).
Fifth, take the branch. Taking a branch can control the growth of one-year standing shoots, competing shoots, and other strong vegetative shoots. In July, the branches have been lignified. Starting from the base of the branches, they are bent by hand and bent upwards every 5 centimeters until reaching the tip. If branches grow too prosperous, this can be done several times in succession, and the branches can be bent horizontally or pendulously.
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