The latest Citrus Autumn High grafting replacement Technology course

Citrus high-grafting means adding improved high-quality varieties to the branches of the original old citrus varieties. Update the varieties of citrus trees to improve the quality of citrus trees and promote fruit. If the high-end replacement work is handled properly, it can survive that year, grow a tree crown in the second year, and begin to bear fruit in the third year. So how to replace oranges with high grafts? Let's take a look at it with the editor.

1. High connection preparation

Before carrying on the high connection replacement, we should first determine the time of the high connection, and then prepare for the high connection. The high grafting time of citrus should be carried out after the end of summer drought and autumn shoot ripening every year, usually from August to September. In the two weeks before grafting, we should strengthen the management of the trees to be replanted. Carry out one-time ploughing and weeding work, control the amount of water and fertilizer, promote the growth of trees to be changed, improve the survival rate of grafting, avoid grafting failure, and affect planting efficiency.

2. High connection method

First of all, we have to prune the overly tightly intertwined branches on the trees that have been changed. Keep some small inner strips in the lower part of the crown and cultivate them as auxiliary branches. Then multi-head high grafting is carried out according to various factors such as tree age and tree crown. Young trees generally have about 15 buds, youth books can take 50, and adult trees can take about 90 according to the actual situation. It is necessary to ensure that the buds are evenly distributed on the tree, and the distribution branches are mainly erect branches and oblique branches.

Before high grafting, we should first select a diamond-shaped scion, and then cut it into a single bud. Then open on the branch, cut the cortex straight to the xylem, and the incision is kept at about 3 cm. Then put the buds into the rootstock, fixed and pressed to ensure the combination of the buds and the rootstock. Then there is a grafting film to tighten the graft interface. Do a good job in the management after grafting, promote to avoid air leakage and water leakage, and affect the survival rate of grafting.

3. Management after grafting

After about three weeks of grafting, we should often check the grafting of the buds to find out whether the grafting interface is alive or not. If the grafted buds are found to be withered and yellow, moldy and other colors are wrong, then it is very likely that the grafting failed. Therefore, at this time, we have to finish the reconnection work before the end of October. If the color of the bud is normal, then the grafting is successful. However, it should be noted that the grafting film can not be untied at this time, otherwise the growth of new shoots will be seriously affected, freezing injury and other conditions will lead to death. The film should be uncovered step by step before Ching Ming Festival in the following year.

The above is a brief introduction to the technology of high grafting and replacement of citrus in autumn. High grafting and replacement work can effectively improve citrus yield and fruit quality, and enhance planting efficiency, so we must pay more attention to it. This is the end of today's introduction, friends who want to know more relevant information, please continue to follow us!