After selecting three main branches, the remaining branches are not selected, but they cannot be deleted immediately. They should be kept as auxiliary branches. In order to control their growth, they can be picked or pruned in summer. When cutting in the winter of the following year, about 1/3 of the total length of each main branch is cut, and the strong branches are lightly cut and the weak branches are re-cut. The auxiliary branches left on the trunk last year were decided according to the ornamental needs, and the auxiliary branches that hindered the ornamental requirements began to taper from the base. In the spring of the third year, in addition to an extended branch at the top of each main branch, there are often several strong new branches with similar growth potential near the top. Those that are too dense should be removed as soon as possible, and the rest should be pitted, not too long, so as not to affect the growth of extended branches of main branches and the development of weak new branches at the lower part.
When cutting in winter that year, the outer buds of the extension branches of each main branch should be cut short, and the reserved length should not exceed that of the main branch.
Other small lateral branches on the main branch, strong, can be cut off weak buds or secondary branches, weak, can not be cut off. In the second year, the short branches are also treated. For the thrown branches, the long branches are thinned, and the middle and short branches are left as flowering branches, and gradually cultivated into lateral branches or branches. The pruning of branches also adopts the combination of short pruning during dormancy and throwing planting, and at the same time, dry dead branches, pests and diseases branches, thin branches, long branches, over-dense branches and cross branches. The round-headed tree with main branches is round and full, with long and neat flowers, which is suitable for planting on both sides of the garden road or with evergreen trees as the background. The selection, preservation and pruning of the trunk, main branches and lateral branches of this shape are basically the same as those of the natural heart shape except that they are cut short after flowering, and the cutting time is from late April to early May, that is, within 2 weeks after flowering. The cutting length is 10 ~ 25 cm, and dense branches, pest branches, residual branches and useless branches are thinned at the same time, so that nutrition is concentrated and ventilated. Buds are fixed in June, and 1 ~ 3 buds with good positions are left on each branch, and the rest buds are smoothed. Bud wiping can't be put off until July.
When the new shoots grow to about 50 cm, the heart should be removed to control the growth and promote the differentiation of flower buds. When the secondary branches grow to a certain length, they can be cored again. When the crown has reached the required size and is cut short after flowering, it should be done on the spring shoots of the previous year to prevent the crown from expanding. When plum blossoms are planted on lawns, hillsides or natural water bodies, they are suitable for shaping and pruning into clusters of dry and flat circles. Eucommia ulmoides Oliv. has strong clumps, so it is easier to trim it into clumps. Generally, Eucommia ulmoides Oliv. has 3 ~ 5 main branches, and all other unselected branches are immediately cut off. Based on the natural tree shape, this plastic method adopts internal shrinkage and thinning in winter, that is, from 65438+February in winter to February of the following year, the branches that grow too high and too long are internally shrunk, and generally not cut short. A lot of work is thinning branches, especially those that are too dense, dry and dead, pests and diseases, disabled branches, weak branches and branches that disturb the tree shape. Special attention should be paid to this plastic method, which is easy to leave too many branches, resulting in poor ventilation and light transmission of the crown, and the inner branches are easy to die, so a large number of over-dense, aging and useless branches should be thinned out to maintain a good tree shape.
Plum blossom pile can be used in the configuration of rocks or pavilions, terraces, pavilions and other landscape buildings. Uneven, with its tree-shaped flowers, thin and oblique, full of plum blossoms, strong decoration, can set off the beauty of rocks and buildings. The cultivation and pruning of the main branch, lateral branch and flower branch of plum blossom pile shape are basically the same as those of natural joy. The difference is that when cutting short branches, we should pay attention to the direction of cutting buds, that is, cutting buds leaves inner buds for one year and outer buds for one year; You can also leave the left bud one year and the right bud one year, so that the branches form a small bend. The pruning of branches is mainly short, and branches are rarely thrown. Generally, the branches are also matched with long and short branches.
Generally, the grafted Ulmus pumila will be planted after the third year, and it will bloom in that year until it is old. The peak viewing period is about 6 ~ 15 years. After about 15 ~ 20 years, the ornamental effect went from bad to worse, the trees began to age, the flowering quantity gradually decreased, and centripetal renewal appeared. At this time, we should increase the intensity of regeneration, carry out regeneration and thinning every winter, keep the new and the old, the strong and the weak, the sparse and the dense, and cultivate the regeneration branches in the crown in a planned way to gradually replace the original backbone branches.