High grafting and replacement technique of Citrus in Autumn

Citrus high-grafting means that improved high-quality varieties are grafted on the branches of the original citrus old varieties. Refreshing citrus tree varieties to improve citrus tree quality and fruit bearing. If the work of high grafting is properly handled, it can survive in the same year, produce crown in the second year, and begin to bear fruit in the third year. So how should citrus be high-grafted and replaced? Let's take a look at it together with Xiaobian below!

1. High connection preparation

Before the high connection, we should first determine the time of high connection, and then prepare for high connection. Citrus top-grafting time should be selected at the end of summer drought and autumn shoots mature, generally in August-September. Two weeks before grafting, we should strengthen the management of the replaced trees. Carry out one time of intertillage and weeding, control the amount of water and fertilizer, promote the growth of replaced trees, improve the survival rate of grafting, avoid grafting failure and affect planting benefits.

2. High connection method

First, we need to thin out the over-dense intertwining of large branches on the tree to be replanted. Keep some of the lower part of the crown bore small paper, will be used as auxiliary branches for cultivation. Then according to the age and canopy and other factors, multi-head high connection work. Young trees generally receive about 15 buds, youth books can receive 50, and adult trees can receive about 90 according to actual conditions. To ensure that the buds evenly distributed in the tree, the distribution of branches to upright branches, oblique branch-based.

A rhombic scion is first selected and then cut into single buds before overgrafting. Then open on the branch, cut the cortex directly to the xylem, and keep the incision about 3 cm. Then put the grafted bud into the rootstock, fix and compact it to ensure the combination of the grafted bud and the rootstock. Then there is a graft membrane to close the graft mouth. Do a good job of management after grafting, promote to avoid air leakage phenomenon, affect the survival rate of grafting.

3. Management after grafting

After three weeks or so after grafting, we should often check the grafting situation of the grafting bud to master whether the grafting interface survives. If it was found that the color of the grafted bud was not right, such as yellow or moldy, then it was very likely that the grafting had failed. So at this time, we have to catch up with the work before the end of October. If the color of the grafted bud is normal, then it means that the grafting is successful. However, it should be noted that the grafting film cannot be untied at this time, otherwise the growth of the new shoots will be seriously affected, and freezing damage will lead to death. The film removal should be carried out in stages before Ching Ming Festival in the following year.

The above is a brief introduction to citrus autumn high-grafting technology. High grafting and seed replacement can effectively improve citrus yield and fruit quality, and enhance planting benefits, so we must pay more attention to it. Today's introduction is here, want to know more about the relevant information friends, please continue to pay attention to us oh!