Pruning of Bitao during its growing period

Green peach in the northern garden, is an indispensable ornamental tree species in early spring, its tree posture is graceful, flowers charming, ornamental effect is very good. However, it has exuberant growth, many branches and closed canopy, resulting in excessive nutrient consumption and poor ventilation and light transmittance, which is not conducive to branch enrichment and flower bud differentiation. Therefore, it is necessary to prune it in time, especially during the production period (also known as summer pruning), which plays a very important role in the cultivation and management of Bitao. Summer shearing can reduce ineffective growth, save nutrients, improve light conditions, strengthen nutrient synthesis, adjust the opening angle of main branches to balance tree potential, so as to promote the fullness of flower buds at the base of new shoots. Reasonable and timely summer pruning not only lays the foundation for winter pruning, but also reduces the amount of winter pruning. It can be said that summer pruning plays a decisive role in the early formation of Bitao's graceful posture. Summer pruning of Bitao often uses techniques such as sprouting, de-sprouting, heart-picking, twisting, branch-pulling and so on.

1. Wiping buds and removing sprouting means timely erasing the long buds in the inner chamber of the crown, the buds on the back of the backbone branches, the competitive buds under the cut, and the buds in the upper part of the branches after flowering, so as to "remove one and leave one" to the tender shoots, and the young trees will remove the strong shoots and leave the weak ones. Through this method, useless new buds and shoots can be reduced, nutrients can be saved, light can be improved, and the number of wounds caused by thinning branches during winter cutting can be reduced.

two。 To pick the heart is to remove a small piece of twig at the top of the branch. Through coring, the lengthening and growth of the branches can be controlled and fuller flower buds can be formed in the lower part of the branches. In the early stage of shoot growth, coring can also promote the early germination of secondary shoots, which can differentiate fuller flower buds.

3. Twisting means twisting the upper part of the unlignified and upright long branch by 180 °and tucking it into the lower half of the leaf armpit (pay attention to prevent it from warping up again). Through this method to change its growth direction, control growth, promote its transformation into flower and fruit branches, but also play a role in improving light.

4. The pull branch is about to pull the main branch or side branch open and fixed according to the angle required by the tree shape, and the most suitable opening angle is about 80 °. If the angle is not large, it is easy to appear the phenomenon of "upper strength and lower weakness", and it cannot be drawn into a bow, otherwise it will produce vigorous branches in the curved part. Through "pulling branches", we can ease the tree situation and prevent the phenomenon of "bare legs" in the lower part of the branches. Generally speaking, the big branches of more than three years old can be carried out from May to September, and the main branches of young trees can not be opened until June to July. The pruning of green peach during the growing period often varies according to the variety, tree age, tree potential and climatic conditions. The pruning time and times should be arranged according to the actual conditions of the cultivation site, generally around August after flowering, and can be pruned for 2 to 5 times.