Prune walnuts with leaves after picking them to avoid bleeding. Delayed pruning (that is, pruning after germination) can destroy the top advantage, improve the germination rate, and obviously alleviate the tree potential; But it should not be used year after year to avoid excessive weakening. Evergreen fruit trees are pruned after picking fruits in spring or before sprouting new buds.
Pruning in the growing season is generally called summer pruning. It has quick response and strong effect, and is mostly used for young trees and flourishing trees to alleviate growth potential, promote flowering, or adjust the relationship between growth and fruit.
Pruning methods in summer include coring, girdling and softening branches (deciduous fruit trees), timely "budding" and "spreading branches" (citrus), and picking and pruning fruiting mother branches (such as persimmon, chestnut and litchi) in combination with fruits. In addition, plant growth regulators can also be used to replace some summer pruning measures.
Extended data:
Pruning season:
Fruit tree pruning can be carried out all year round, but the methods and points of pruning in different seasons are different. Plastic pruning is mainly carried out in winter dormancy period, and pruning in other seasons has its own emphasis.
Winter pruning: from defoliation of fruit trees to germination in spring. The main purpose of pruning in this season is to arrange the tree shape, stabilize the tree potential, cultivate fruiting branches and adjust the number of flower buds. The main technical measures are: thinning, cutting, retracting, throwing, pulling, parting and so on. Different tree species and planting densities use different tree types, but attention should also be paid to pruning trees and shaping them with branches.
Pruning in spring: After the fruit trees germinate in spring, before the arrival of summer. Mainly pruning before flowering, further adjusting the number of flower buds and reasonable load; In addition, we should also pay attention to the application of technical measures such as bud carving, bud wiping, girdling and girdling.
Summer pruning: it is carried out in summer, when the main purpose of pruning is to improve the light in the canopy. Mainly to remove the flourishing branches, over-dense branches, overlapping branches, cross branches, twigs, pests and diseases on the upright back; In addition, measures such as twisting the tip, removing the core, taking branches and pulling branches can be taken to weaken the advantage of the top of branches and promote the formation of flower buds.
Autumn pruning: in autumn (September). The main purpose of pruning at this time is to further improve the light in the canopy and promote the formation of flower buds. The main measures are: thinning the shading branches, flourishing foliage on the back, flourishing foliage, pests and diseases, etc. Young fruit trees mainly pull branches in autumn to relieve tree vigor and promote flower bud formation.
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