Pruning walnut trees requires a good pruning time. Spring pruning is the pruning of walnut trees from germination to leaf spreading. Pruning in this period is suitable for unfruitful trees or trees with excessive growth, which can control growth, weaken tree vigor and bear fruit early. Trees that are not suitable for pruning at the initial fruit stage will cause bleeding, destroy nutrients and weaken tree vigor. Summer pruning is mainly light pruning, which is suitable for pruning walnut trees that are too lush and fruitless. The pruning time in autumn is from the harvest of walnuts to the yellowing of leaves, and it can be selected from mid-September to165438+1early October, which is suitable for pruning weak trees and old trees. Walnut trees had better not be pruned in winter to avoid bleeding.

2, pruning tools

It is best to use special gardening scissors to trim walnut trees, and disinfect the scissors in advance to prevent the germs on the scissors from infecting the incision.

3. Main pruning methods

Sawing and forcing branches: in order to force buds, you can saw them on the bare legs until they reach the xylem, which can promote germination and grow new branches.

Ring saw: For large non-trunk branches of walnut trees, ring saw can be used.

Pinch: Before June, the new buds in the inner chamber had not been lignified. At this time, the branches with inappropriate growth direction can be pressed to a spatial position.

Drainage: Drain dead branches, dense branches and internal branches.