Pruning principle of plums When plum trees are strong, tall and grow naturally, their stock price index is more, and the shaping mainly adopts natural development type. Prunes are mainly pruned in summer, especially in winter. At the same time, the pruning methods include Sudan, Dandan, relaxation and contraction. The purpose of pruning plums is clear. One is to enlarge the crown and increase the number of lateral branches, and the other is to increase the number of fruits. The specific pruning method you can choose depends on the specific situation of fruit tree cultivation.

Summer pruning is mainly in small groups. Remove the branches from the lower part of the fruit tree stem. In the new shoots of plum trees, three or four branches with good growth, suitable direction and large angle are selected as the main branches. Cut the eggplant with high density or inappropriate growth position properly and pick the core of the growing species. The purpose of summer pruning is to improve the scenic conditions of fruit trees, save unnecessary nutrient consumption and help flower bud differentiation. When ignoring eggplant, don't cut it too much at a time, and don't make it longer. Winter pruning is also called dormant pruning. Supplementary pruning is mainly carried out on the basis of summer pruning, and the stock price index is extended or trimmed by about 60 cm. The winter pruning method is relatively simple. Mainly preserve eggplant that grows well, and cut off diseased branches, dead branches, old branches and weak branches on plums. Although the method is simple, the workload is relatively large.

In early spring, the useless buds of young trees should be smeared as soon as they germinate to ensure the effective supply of nutrients for young trees. If the useless things that have been removed germinate and are cut or split when the branches are developing, the buds should be removed. Through these two processes, the growth of useless branches of young trees is controlled. The coring time can be completed when the new shoot length reaches 10 ~ 15 cm. Picking the heart is mainly to promote flower bud differentiation and adjust the growth momentum of Wang Jiazhi. The number of coring depends on the growth and needs of trees.

The knotting time is from the new branch tip to 30 cm, and it is suitable when the branchlets are not lignified. At this time, the end of the knot will not be easily damaged by xylem operation. Put the upright branches, competitive branches and inner dense branches on the back of young trees, and gently rotate 180 at a distance of 5 ~ 10 cm from the base to make them grow downward. Control the growth rate and direction. Cultivate trees. The annual upright branches and competitive branches are all broken off from the branches by hand, and then folded up 5 cm along the branches until the fleet. Strengthen flower bud differentiation and improve ventilation and light transmission of trees. When the growth is stopped, the bark is peeled from the stems or branches of Wang Shu, and the peeling width is about110 of the diameter of the peeling tip, which has a good promotion effect.