One, young tree pruning.
After the seedlings are planted, the main and lateral branches are selected according to the requirements of plastic surgery, and the balance of the tree vigor is also taken into consideration. When main branches and branches are uneven and the affiliation is not clear, the strong branches can be compressed, the opening angle of the strong branches can be increased, the twigs can be kept small, and the branches can be lightly cut to be handled. Weak branches need to raise the angle, leaving more twigs, the results of the tree leaves less Fruit, appropriate extension of the extension of the branches.
Lishu has a high germination rate and results mainly from short fruit branches and fruit-like fruit branches. Therefore, pruning should pay attention to the elimination of prosperous development branches and excessively dense medium and long fruit branches to adjust tree nutrients and promote flower buds to be enriched. And fruit branches are robust and improve the ability to produce flower results. Some species of Chinese Li go into the fruiting period after the fruiting period. The new shoots that germinate in the year are mostly fruit branches. If they are not cut off, the tree vigor is often weakened due to excessive branches and flowers. As a result, there are many flowers and few fruit set, which affects the yield. And economic benefits. Because Li Shu mainly results in short fruit branches and fruit-like fruit branches. Therefore, the developmental branches with stronger growth and the middle and long fruiting branches can be appropriately thinned or shortened and transformed into short fruiting branches.
The apical dominance of plum is more obvious. The young plum tree tip is easy to draw development branches and long fruiting branches, while the lower part is easy to pull out short fruit branches with weak growth potential, but this weak branch has bad results. In order to promote Healthy fruiting branches, attention should be paid to cultivating fruiting branches; short fruiting branches and fruit-like fruiting branches on the same base branch can also be used in turn to maintain the robust growth of short fruit branches. When the base branches are extended year by year, their growth will become weaker. When unfavorable results can be renewed or eliminated. The branches of the plum tree are short, and there are many branches and buds. The new shoots are easily crowded and clumped. In order to maintain good ventilation and light conditions inside the crown, it is possible to eliminate excessive shoots promptly after germination in early spring. Removed dense branches in summer. For a 1-year-old strong branch with a length of 30 cm or more, cut 1/4 full-length when trimming; for 15-20 cm long middle branch, you can cut 1/3 or so; the extension branch should stay for long, and the collateral branch should be short. stay. In the extension of the top of the branches, generally can be smoked 3 to 4 new shoots, trim when leaving one for the extension of the branches, leaving the lower part of a lateral branch, the excess branches, can be removed from the base.
Second, high-yield plum tree winter cut.
The main task of the winter cropping in the high yield period is to maximize the yield per unit area, strictly control the formation of the bald zone in the size of the year and the rear, reasonably prune the branch group, and maintain the health and longevity of the tree body. Should be re-based shear, combined with light and heavy, in order to maintain the balance of growth and results, reshaping results and re-into the results. It is advisable to carry out one-half and short-cut for the main and lateral extension branches at all levels, and to cut off the fruit-like fruit branches and short-fruit branches on the branches so as to avoid weakening the tree vigor; The situation may be appropriate to retract the main, side branch or head change. The results of the branches should be transferred to the fruit-bearing fruit group as the main result, accounting for more than 90%, pay attention to 2 to 3 years old on the branch culture, to early culture, late branches are bald and difficult to cultivate. For 4~5-year-old fruit-like fruit branches, timely rejuvenation or combined with fruit thinning restores its vitality. The result of debilitating branch regeneration and rejuvenation is the key to guaranteeing overcoming years of age and baldness. The main technique is to “remove one part and three parts†and to stay strong, to stay in the middle, and to leave it. One-third of the lengthening of each stage is shortened, and the second and third lateral branches are trapped one-half; on the branches with long legs, dense branches, overlapping branches, and cross branches, care is taken to eliminate and cultivate early; Retract; for the development of branches and less squid appropriate "first cut after the release" and "first put back cut" to cultivate medium-sized branches.
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