How is the multi-head high grafting technique done?

Multi-head high grafting technology: It is suitable to use 3-8-year-old rootstocks for multi-head high grafting in spring, preferably 3-5 years old, and more importantly, the branch age is less than 3 years, and the branch diameter is 1 ~ 1.5 cm.

Generally, it is carried out from late March to early April after the grafting stock is sawed off.

The ratio of rootstock to panicle thickness at the grafting site should be above 2∶ 1, and the ratio of rootstock to panicle thickness is large, which has strong growth potential.

Grafting rootstock should be inclined or upright, and the lateral back of branches should be appropriate. Lateral or drooping growth will be poor and the effect will be poor.

Take sun protection measures such as painting the trunk to prevent sunburn.

Be sure to pay attention to the combination of roots and ears. Grafting of Red Fuji and Beidou showed strong tree potential on the rootstocks such as Marshal, Jinguan, Guoguang, Green Banana and Zhuguang.

Short-branch varieties cannot be grafted with short-branch varieties, and short-branch varieties cannot be grafted with dwarf rootstocks and dwarf intermediate rootstocks.

The diameter of high grafting rootstock branches is about 65438±0.5cm, which is beneficial to all healing in the same year. If the diameter is greater than 2.5 cm, 2 ~ 3 scions should be added to each joint to facilitate healing.

The length of branches at the grafting interface of main branches at all levels should be 1/3 ~ 1/4, and the fruiting branches should be grafted at the base of 3 ~ 5 cm.

Scions can be divided into long spikes and short spikes. Long spikes usually have 10 ~ 15 buds, and short spikes usually have 2 ~ 5 buds.

Long panicle is beneficial to increase the total number of branches and the proportion of medium and short branches in the whole tree, which is beneficial to early fruiting.

The number of top grafting is related to the height, thickening and total number of branches of the tree. Multi-head high grafting can obviously increase crown diameter, thickening, total branches and short branches, which is beneficial to restore tree vigor and bear fruit early.

It is important to tie up the joints. At present, plastic film strips or plastic film strips are generally used, and they must be tied tightly. You can protect the wound with wax or paint to prevent water from evaporating.