A few buds at the top of Carya cathayensis germinate new buds, while most of the buds at the bottom do not germinate and become hidden buds. Small trees grow very strong, and when there are many branches at the top, they are easy to rotate and stratify. After entering the fruiting period, the new shoots with strong and full growth at the top are easy to become fruiting mother branches. Results Most of the mixed buds of mother branches are terminal buds, and sometimes 1 ~ 2 axillary buds below the terminal buds can also be mixed buds. Most of the smaller buds below have male inflorescences. Male inflorescences and new branches appear at the same time and are inserted at the base of new branches; The female inflorescence is planted at the top of the fruiting branch of the current year born of mixed buds at the top of the fruiting branch, with 2 ~ 1 0 female flowers per inflorescence; After the top of the fruiting branch bears fruit, most of them can not form mixed buds in the same year, but strong young trees can also be transformed into fruiting mother branches in the same year and continue to branch and bear fruit in the next year. Therefore, as far as 1 branch is concerned, there is often a phenomenon of bearing fruit every other year.
Carya cathayensis has a large number of hidden buds, long life and easy germination, so it has strong regeneration ability.
Under the condition of natural growth, the early tree shape of Carya cathayensis is mostly conical with obvious stratification. However, after entering the fruiting period, the growth ability of the central trunk is weakened, and the ability to extend upward is weakened, while the surrounding main branches continue to grow outward, and the crown becomes round or cylindrical.
According to this natural characteristic of Carya cathayensis, the sparse layer modeling of trunk is better.
After the grafted seedlings or seedlings are planted, two branches can be drawn from the upper part of the trunk because of their vigorous growth. Therefore, the main branch of 1 layer can be selected in that year, and with the extension of the central leadership, the main branch of 1 layer can be selected every year and kept. Young trees grow vigorously and the distance between layers is large. With the weakening of growth, the interlayer distance decreases accordingly. When shaping young trees, the pruning amount should be light, so as to quickly increase the crown and bear fruit as soon as possible. All branches can be reserved as spare branches except those that are too dense. After entering the fruiting period, the crown gradually increased and the number of big branches increased. Extra large branches can be thinned in different years to maintain good ventilation and light transmission conditions. Long branches that are temporarily useless should also be thinned out in time. The mixed buds of the fruiting mother branches of Carya cathayensis are mostly located at the top of the branches, and cannot be cut short, so special attention should be paid to pruning.
When Carya cathayensis 15 years old, the height of the tree can reach more than 5 meters. For the convenience of management, it can turn its head happily so that the crown will not continue to increase. When pruning in the future, it is mainly to prune dense branches, drooping branches, dead branches and so on. And the amount of pruning should still be relatively light.