Methods and techniques of grafting seedlings

Grafting seedlings can be divided into five methods: bud grafting, split grafting, leaning grafting, ventral grafting and cutting, in which the bud of scion is cut into shield shape and the rootstock is cut into T shape to embed the scion; split grafting is used for grafting of thicker rootstock or high grafting; the method of relying on grafting is that rootstock and scion have separate roots in the process of grafting; ventral grafting is carried out in the abdomen of rootstock. The cutting method is to cut vertically in the slightly xylem of the rootstock and cut out a slope at the lower end of the scion for grafting.

What are the methods and techniques of grafting seedlings?

1. Bud grafting: Bud grafting refers to the grafting of a scion with a bud with cambium.

The bud grafting method is usually carried out from July to September, and the T-shaped shield bud embedding method is usually used, that is, the scion bud is cut into a shield shape, and the rootstock is cut into a T shape to insert the scion. When dealing with rootstocks, you should choose a smooth surface at the grafting site, preferably in the north, cut horizontally and deeply into the xylem, then cut longitudinally in the incision to make it into a "T" shape, gently peel off the bark (even xylem), insert the panicle bud into the "T"-shaped incision, and finally wrap it with film from bottom to top, expose the bud eye, make a living knot, and untie it immediately when sprouting in the second year. After the completion of grafting, we should observe more, and remove the dressing film in time if we find that the scion buds sprout.

2. Splicing method: also known as splicing, it is generally used for thicker sweet-scented osmanthus rootstocks or high grafting.

Attention should be paid to the treatment of rootstocks, and the growing points and heart leaves should be removed. When grafting, put the rootstock at the local end of a certain height, and then use a cleavage knife to split vertically down the middle of the section of the rootstock, with a cut of 4 cm to 5 cm. Scions are generally 2-year-old, with 3-4 nodes of branches, length of 10 cm is appropriate. Cut into equal wedges on both sides of the scion, then insert 2-4 scions into the incision of the rootstock, so that the cambium of the two are closely combined with each other, and firmly bound with plastic film, pay attention to cover the section of the rootstock and the top of the scion with thin film.

3. Grafting method: the characteristic is that rootstock and scion have their own root system in the process of grafting. It is determined that the scion can survive in the rootstock before disconnecting the root system. The connection method can generally be implemented from May to June. When leaning against grafting, the female parent branch as scion and the female parent branch as rootstock are each cut off 5 cm to 10 cm at the corresponding height, leaving two diagonal ports with a depth and a dry diameter of 1/3 to 1/2, aiming at the cortex to combine their cambium with each other, and then bind them with thin film. After receiving the work, the scion can be cut off from the junction.

4. Abdominal grafting: a method of grafting in the abdomen of rootstocks.

When grafting, within 3-5 cm from the root of the rootstock, cut into the rootstock at an angle of 20-30 degrees with a cutter, up to 1 inch of the diameter of the rootstock. The lower end of the scion branch is cut into a double-sided wedge of 1 cm and 2 cm, retaining 1-2 pairs of buds. After the scion was truncated, it was inserted into the incision of the rootstock, aligned with the cambium on one side of the rootstock, and then bound the whole joint with plastic film tape.

5. Cutting method: when grafting, cut the rootstock 5cm from the ground and cut it flat. On the smooth side of the bark, cut down vertically with slightly xylem, and the incision should be 2cm to 3cm. The lower end of the scion needs to be cut out of a 2cm bevel and then obliquely cut into a short oblique plane of about 1cm on the reverse side of the slope. Keep one or two pairs of buds in the scion and cut across when cutting.