1 scion collection and processing

1.1 collecting scion

Scion: Collected from large trees with good varieties and strong growth, and cut off the developmental, well-grown, full-bodied, stout annual growth branches or fruiting branches 30 days before the mother tree sprouts. Or the result of the mother branch storage period can not exceed 50 days, otherwise it will reduce the survival rate of grafting, once the storage period is more than 80 days, it is not easy to survive after grafting.

For the scissored scion to cut off the unfilled part of the anterior segment of the branch and the blind segment of the result branch and the curved part of the base, the scion length is required to be 20 cm long and 0.6 cm or more thicker;

After collecting the scion branches, bundle 50-100 pieces, mark them, and store them in a low-temperature moisturizing bowl.

1.2 Scion storage

When the number of scions is small, it can be stored in the mantle or cave, and measures to prevent the temperature rise, keep the temperature of the mantle or cave not more than 10 degrees, or store it in the refrigerator for refrigeration, or put it in the well for storage;

When the number of scions is large, use storage, ditch or cold storage.

1.3 scion wax seal

Wax sealing of the scion can extend the shelf life of the scion and increase the graft survival rate;

The specific operation of the scion wax seal is as follows: the scion is cut into a length of 10-15 cm, and then the industrial paraffin is melted in the container, and the melting temperature is controlled at 80-100 degrees. After the paraffin is formed, the wax is immediately taken out at one end of the scion. The faster the better, then the same operation on the other end, so that the entire scion is covered with a uniform paraffin layer. After the wax seal is fully cooled and cooled, bundle it into a sack or plastic bag, place it in a cool place and mark it for sanding or refrigerating.

2 grafting period

Beginning in April and ending at the end of May, the daily average temperature is required to reach 15 degrees or more, and the new shoots grow to 0.5 cm. It is most suitable for grafting when the leaves are not displayed.

3 grafting method

3.1 cut belly

It can be carried out when the rootstock is not peeled off. The method is simple and the survival rate is high.

3.1.1 The cutting of the rootstock should be at the appropriate height, and the smooth side should be selected. In the pre-grafted part of the rootstock, the knife is cut obliquely from top to bottom. The incision is deep into the xylem. The depth of the incision is shallow and shallow, and the depth of the incision is the length of the incision and the length of the scion. The noodles are quite equal.

3.1.2 It is advisable to cut the ear of the ear to slightly longer, slightly thicker and slightly curved. Select the growing branch with annual growth and make the scion into a wedge shape. Use a knife to cut the 3-5 cm in the lower part of the scion. Long shaved noodles, then cut into the short cut surface of 1.5-2.5 cm on the back side of the long shaved surface, so that the lower end is slightly pointed. The side between the two shaved surfaces should be slightly thicker on one side, and the upper part of the scion should be 2-3 full buds. Leave it on the back of the large shaved noodles. The noodles must be smooth and 0.5 cm cut off the top of the buds.

3.1.3 Engagement Quickly cut the scion to the outside, insert the rootstock facet cut into the long cut face.

3.1.4 After binding, use a plastic strip to tie the bag tightly and moisturize.

3.2 subcutaneous abdomen

It is used when the rootstock is peeled off. It is mainly used for the bald banding in the chestnut tree, and can also be used for high-end exchange;

In the part of the rootstock that needs to be supplemented, first cut the old skin of the rootstock to the fresh phloem, then cut a “T” shaped mouth, at the upper end of the transverse incision 1-2 cm, use a grafting knife to cut down, and cut the crescent Shaped noodles, to the "T" shaped transverse incision, deep into the xylem, so as not to "pillow" after the insertion of the ear; use curved scion, the length of the scion is 20 cm, the face length is 8-12 cm, the back is cut to The phloem is arrow-shaped, and then the scion is inserted into the rootstock of the rootstock and tightly wrapped with plastic strips to expose the wound.

3.3 abutment with a branch

The advantage of the abutment with the base branch is that the base angle is naturally opened, the angle is large, and the root of the root of the root is "T", without cutting the crescent knife edge, and there is no need to worry about the "cushion" problem;

The specific method is:

Thinning the old skin of the rootstock and cutting a "T" shaped incision at the selected part;

There are two 1-year-old branching branches on the 2-year-old mother branch of the scion. The 2-year-old mother branch is cut 3 cm, and one 1-year-old branch is selected on the branch, which is reserved for scion and the other branch is branched. Cut at 2 cm, the cut branches can also be used as other chestnut trees for cutting the ear;

Cut from 1 year old branches to 2 years old base branches into horses, 1 year thick branches, 2 years old base thin, cut 1 year old branches with 2 year old branches The root of the rootstock is “T” shaped and can be wrapped with plastic strips.

3.4 bare column insertion

When the chestnut is germinated and peeled in spring, leave 50 cm in front of the interface of the grafting station, strip the bark with pliers, and then connect the scion to the rootstock with the skin inserted; apply to “happy, pull branches, engraved buds” Chestnut Garden of Zaofeng Technology; Advantages of bare column insertion and abdomen connection: avoiding the significant impact of tree body injury on the formation of grafted tree callus during the injury period and avoiding the occurrence of windy branches and branches, promoting the healthy growth of the main and lateral branches The interface is well healed, which is beneficial to improve the graft survival rate.

3.4.1 Rootstock peeling treatment At the interface about 20 cm away from the main trunk, the bark is stripped with pliers, leaving 50 cm to make a fixed living pillar.

3.4.2 The length of the cut noodles is 5-8 cm, and the length of the ear is 7-10 cm. It is guaranteed that there are 3-4 full buds.

3.4.3 Insert the ear on the inside of the main branch and select the smooth position to open the cortex and insert the scion.

3.4.4 Grafting special plastic strips for dressing, the interface is tightly packed, and the buckle is fastened.

3.4.5 Anti-insect mites: use flour to make a thin paste, then add a concentrated organic phosphorus insecticide, which can be used to repel pests on the branches; prevent the chestnut by the pesticide's avoidance effect on pests The winged moth adult lays eggs and larvae foraging interfaces at the interface.

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