After the mulberry is harvested, after a period of tree restoration, the aboveground part of the plant is cut off 20 ~ 30 cm from the ground, which is called summer pruning. Summer cutting is mostly used for high-density planting of fruit and mulberry orchards. Cutting in summer should be carried out according to the requirements of tree cultivation and the number of fruiting mother branches selected in the second year.

2. Method of removing sprouting and thinning

After mulberry sprouts in early spring or summer, wiping off or cutting off buds is called sprouting removal or wiping off buds, and thinning out dense new buds when new buds begin to grow rapidly is called thinning. Its function is to reduce branches, enhance illumination, facilitate ventilation, improve photosynthetic efficiency, reduce the content of auxin indoleacetic acid which is beneficial to tissue differentiation but not conducive to cell elongation, promote flowering and fruiting, and improve fruit quality.

3, coring and pruning methods

Its purpose is to promote the germination and growth of secondary buds, increase the number of branches, improve the number of branches, and realize rapid shaping, early fruiting and high yield; Timely denucleation can promote the development and enrichment of branches and buds, promote the differentiation of flower buds, and improve the quality of flower buds and fruit setting rate.

4, in addition to the secondary branch method

After cutting in summer, the number of fruiting mother branches in the second year has been selected and determined. Therefore, the secondary branches germinated in the axils of the leaves on the mother branches should be pulled out in time to avoid disturbing the tree shape and affecting the light.

5. Shortcut method

Short cut is a part of pruning branches, called short cut. Its function is to increase the number of branches, weaken light, reduce more short light waves and increase the synthesis of indoleacetic acid, which is beneficial to cell division and elongation and promote nutritional growth.

6, refinement method

Draining is also called draining, that is, draining branches from the base, which is mostly used to deal with branches that are too dense. Its function is to improve the lighting conditions of trees and enhance the light in the canopy, especially the short-wave light.

7. Shrinkage shear method

Shrinking is also called "retraction", that is, cutting short on perennial branches. Shrinkage for "four sides" and sparse planting of tall mulberry trees. The function of contraction shear is mainly to help or reduce the potential.