Shrub type tree form pruning method of Chinese ash

Abstract

The invention discloses a shrub type tree form pruning method of a Chinese ash. The shrub type tree form pruning method of the Chinese ash comprises the following steps: (1) confirming a base trunk of the Chinese ash used for growing branches, (2) pruning an upright main root of the Chinese ash and reserving branch roots of the Chinese ash, (3) selecting sturdy branches as reserved first-level branches from the branches grown from the base trunk in different directions through a direction complementary principle after the branches grow a period of time, pruning the other grown branches from the base trunk growing parts, and shortening the selected first-level branches after the first-level branches grow 1-2 years, (4) selecting reserved second-level branches according to the selection principle of the first-level branches, and (5) processing routine pruning and management to each level of follow-up growing branches according to the shrub type tree form. By means of the shrub type tree form pruning method of the Chinese ash, reuse of a Chinese ash with a damaged trunk is realized, waste of plantlet resources in avoided, economic benefit is notable, adaptive capacity of Chinese ashes to environment of coastal saline areas is improved through transform of the tree form, large shrub species needed in green construction are enriched, and Chinese ashes have notable landscape value and ecological benefits after being pruned.

Description

technical field [0001] The invention belongs to the technical field of landscaping nursery stock pruning, and in particular relates to a shrub-type tree-shaped pruning method for ash trees. Background technique [0002] Ash trees (Fraxinus chinensis), including Fraxinus rhynchophylla, Fraxius bungeana, Fraxinus velutina, Fraxinus pennsylvanica, and Fraxinus americana, as an excellent The famous landscaping tree species has been widely planted in the northern coastal areas, and has also become the backbone greening tree species in some areas, such as the coastal areas of Shandong and Hebei, and Tianjin has designated the white wax as a city tree. [0003] As an arbor, the ash tree is often used in street tree greening, shelterbelt greening, and can also be used as garden and factory greening. It can be planted in groups in a regular or natural form, or it can be used as a single planting spot for viewing. There are various forms of greening. The ash tree has the characterist...

AI Technical Summary

Problems solved by technology

This tree type has some weaknesses in coastal saline-alkali areas: first, it has poor wind resistance and is susceptible to wind damage or lodging, resulting in poor tree growth; second, the water evaporation of the tree body is large, and the roots supply water to the crown The distance is long, which will easily cause the crown or upper trunk to dry up due to lack of water; at the same time, this pruning method will cause some bent trunk seedlings or ash tree seedlings whose trunks are damaged by diseases and insect pests to be eliminated during the seedling cultivation process, resulting in waste of trees

[0005] The problem of the arbor type ash tree is that in the greening application of the coastal saline-alkali area, the ash tree is used as an arbor. Due to the influence of soil salinity and sea breeze, the ash tree often has a dry crown and even a dry upper trunk.

This problem is common in greening construction in coastal saline-alkali areas, so a certain number of ash trees will be eliminated every year, and at the same time cause certain economic losses

[0007] The shrub-type tree shape of ash tree is rare, and occasionally it is only formed by damage to the trunk or natural growth. The directional cultivation of shrub-type ash tree is still a technical blank

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