Ginkgo Winter Pruning

First, the short cut: The main role is to promote branching, increase branching force, change the extension direction and angle of branches, and promote the growth of local branches and the resulting base branches. According to the experiment, short cuts have a significant effect on the emergence of new shoots on the trunk of Ginkgo biloba saplings or on robust shoots, but have little effect on the emergence of shoots on ginkgo trees. The strength of the axillary shoots is closely related to the degree of plumpness of the shoots and the growth of the shoots. Generally, the strong buds and strong shoots are strong and the weak buds often do not germinate. The strong branches of Ginkgo biloba are shorter and heavier, and the new branches that are pumped are more vigorous. Under the cutting of the strong branches, 2 to 3 new shoots can be drawn; after the weak branches are short cut, there are few or no branches. In order to change the position of the main and lateral branches, or to change their direction of extension, short shoots and buds can be broken.

Second, the thinning: The main is to eliminate the dense branches, cross branches, and branches, overlapping branches and leggy branches that are difficult to use. In order to cultivate the main branch and increase the distance between the layers, it is necessary to properly remove the verticillate branches and adjacent branches when pruning. In the event that the leggy branches on the big branch cannot be used, they should be removed promptly. When the growth of the tree is weakened and the outer branches are densely and densely contaminated, the thin and weak branches can be eliminated. Ginkgo trees have many short branches, few long branches, and the inner branches of lychee are easily crowded. Weeds must be cut off in time, old branches, fallen branches, and upright branches must be cut off in time. For the remaining branches, we should not remove too much.

Third, shrinkage: generally applied to the twigs of more than 20 years old. When renewing, the clipping on the large branch should be generally selected before the highest point of the pendent point of the pendent branch, and it is better to have a vigorous upper branch under the retraction port. After retracting and trimming, the retracting mouth should be All old branches cut off. Young ginkgo trees need to increase the amount of foliage, so generally do not need to shrink, old trees use more shrinkage when updated. In shrinking and shearing, in addition to the base branches resulting from aging and incompleteness, the backbone branches may also be retracted in a subordinate relationship. In order to prevent the clipper from dehydration and desiccation and affect the germination of the clipped buds, an additional 5 cm of the branches should be left on the clip. To change the extension direction of the apex branches, the opening angle of the branches should be increased or decreased, and the ventilation in the crown should be changed. Under light conditions, shrinkage can be applied.

Fourth, injuring: In order to promote budding germination, in winter, in the top of the bud injury, sprouting in the spring; in summer, in the lower part of the bud injury, is conducive to flower bud differentiation, but also the role of balanced tree vigor.

5. Injury: In the early spring, when the sap flows, use a knife to score longitudinally on the trunk or main branch and reach deep into the xylem. After injury, the trunks and branches can grow quickly and boldly to increase the resistance and absorption capacity of the tree, advance to the age of the result and promote high yield. Injuries should be performed on at least three different branches to ensure balanced growth of stems and branches.

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