If the planting position is suitable, but the growth posture is not satisfactory, which affects the overall balance of the crown, it should be adjusted and reformed. If it is too high or too long, it should be taken back. The order of selecting and retaining backbone branches should be from large to small. Except for a few perennial branches suitable for making branches, they can't be cut for the time being. The specific steps and methods of transformation can be found in the fifth part, chapter 2, abnormal tree transformation and pruning technology.
2. Young trees promote branches and prevent backward pulling: young walnut trees have few branches and most of them extend uniaxially. When pruning, try to promote multiple branches by cutting buds and shortening. At the same time, it can prevent the phenomenon of "backward pulling" caused by the competition between the back branch and the extension head.
3. Cherish male flowers to save nutrients: Male flowers are a kind of consumable branches, which are generally 5-6 times more than female flowers on the fruit-bearing tree, wasting a lot of nutrients on the tree. Pruning should be as sparse as possible to preserve nutrients for the results.
4. As a result, the top flower buds were mostly used: the top advantage of walnut branch buds was very obvious, and the mixed buds at the top of mother branches were the most plump and fruity. Pruning should make more use of the results of the top flower teeth.