Chestnut spring branch new method
Chestnut buds are not easy to survive in summer and autumn. They are often used in spring branches, and the branches are later than other fruit trees. It is advisable to sprout on the rootstock and spread the leaves. Generally, from late April to early May, if the grafting is too early and the temperature is low, the rootstock cortex is not easy to peel off, the interface is slow to heal, and it is not easy to survive; when grafting is too late, although the temperature is high and the interface is healing quickly, the rootstock growth consumes a lot of nutrients. , It is easy to weaken the tree vigor; and after the growth period is shortened, the ability to pass through the winter declines. Chestnut grafting is usually carried out by grafting. Therefore, grafting is the most commonly used method. The traditional method is to select 3-6 years old, grafting 3-5 cm diameter branches. First saw the branches cut or cut in a smooth place. Cut the keratinous hairs with a knife. Cut about 15 centimeters long. Scion with 2-4 full shoots at the top, and cut the base into a horse-shaped bevel. To be smooth, 5 cm or more in length, less than 1/2 the thickness of the ear, and then lightly knife each side from the back of the noodles to make it an arrowhead; use a knife to split the rootstock and cut the scion to the xylem. , Insert the connector vertically, do not expose noodles; then use plastic strips to tightly pack. If the rootstock is thick, two or more scions can be inserted to facilitate healing of the interface. In practice, the above methods can be improved, that is, when sawing rootstock, leaving 30 cm more than the grafted part, and then grafting at the grafting place; the method is the same as above, and the remaining part is used as a living pillar. The main advantage of this approach is that it no longer needs to be tied with struts. When the buds sprouted on the scions and the new shoots were 20 cm long, the shoots were tied directly to the living posts. It not only saves a lot of wooden sticks, but also is very strong after binding, which provides great convenience for the management after grafting survival. Through several years of experimental observation, it does not affect the survival rate. Precautions: 1. All buds or shoots left on the live pillars should be wiped off, and they must be inspected at any time. They cannot germinate, otherwise they will affect the survival of grafting and the growth of new shoots. 2, to be phased in batches of unbundling and binding of new shoots, to be budding new shoots grow to more than 20 cm long, the lifting of plastic strips, while the new shoots tied to live pillars. If the new shoot is less than 20 centimeters weak, do not release the plastic strip and do not want to tie the new shoot. 3. In the spring of the following year, when the rear twigs can bear their own weight, the part that will remain as a living pillar will be cut off at the grafting site. China Agricultural Network Editor