Juglans regia grafted with Juglans regia belongs to Juglandaceae. We know that the survival rate after grafting is high, and it is best to graft plants belonging to the same family. At present, the most commonly used tree species for grafting walnut trees are mainly walnut trees, maple trees and Juglans mandshurica seedlings, as well as high-quality different varieties of walnut trees, and the grafting effect will be different. Of course, the choice of grafted trees is related to the needs of the grafters for the later growth of fruit trees.
The grafting time of walnut trees is generally from April to June every year, and the specific operation time depends on the local temperature and the grafting method adopted. In general, the time of branch grafting is earlier, and the method of bud grafting can be postponed appropriately.
Grafting method and specific steps of walnut tree 1 Splitting method: split a bite on the rootstock of walnut tree and insert a scion, so it is called splitting method. Splitting is the main method of branch grafting in spring.
2. Double-door budding and single-door budding: When grafting, the bark on both sides of the incision of walnut rootstock is pried open, which is like opening two doors, so it is called double-door budding; Single-door budding is just to pry open the bark on one side of the incision.
3. Square grafting: When grafting, the buds of walnut trees are square, and a square bark is taken from the rootstock, so it is called square bud grafting.
Walnut tree 1 grafting precautions. Walnut field grafting uses green branch scions of walnut trees, which are picked nearby and grafted while picking. If you need to transport or store the scion for a short time, you must do a good job of moisturizing.
2. The grafting site should be selected on walnut branches under 3 years old. The grafting site is too thick and the cortex is too thick, which affects the survival rate.
3. When grafting walnut trees with large rootstocks, they should be reshaped before grafting. Moreover, the buds should be connected on both sides of the branches to facilitate opening, ventilation and light transmission.
4. Complete walnut leaf buds or mixed buds must be selected for bud grafting, and male flower buds cannot be used as scions. Generally, withered buds are used as scions, which cannot germinate that year.
5. The grafting operation of walnut trees should be rapid and the pruning should be strict.
6, pay attention to listen to the weather forecast, try to avoid rain, so as not to affect the survival.