Ailanthus altissima has straight trunk, round crown, thick crown and full samara in autumn. It is widely used as a shade tree in the garden and can also be planted as a street tree.
Ailanthus altissima is a deciduous tree with a height of 30m, DBH exceeding 1 m, a spherical to oblate crown, and many old trees are umbrella-shaped.
The bark is grayish brown, smooth or with shallow cracks.
Branchlets stout, light brown or reddish brown.
Odd-pinnate compound leaves alternate, with length 1 m, lobules 13 ~ 25, and ovate-lanceolate to elliptic-lanceolate.
Panicle terminal, white or green mixed flowers, flowering in May-July.
Samara is flat, oblong or spindle-shaped, brown or slightly flushed at first. The fruiting period is from August to 65438+ 10.
Ailanthus altissima likes light and is cold-resistant.
Drought-resistant and barren, but not resistant to water accumulation.
Young trees, like well-drained sandy loam, grow well in moderate saline-alkali soil and can adapt to slightly acidic, neutral and calcareous soil.
Deep roots, developed roots, strong germination and fast growth.
Strong resistance to soot and sulfur dioxide.
Ailanthus altissima grows rapidly, is dry and stratified, and has strong ability of germination and tillering.
Although there is no terminal bud, its top advantage is still very strong, so the trunk is straight and tall.
Flourishing leaves, flourishing leaves.
It germinates in mid-April, leaves fall in mid-October 165438, and the annual leaf period is short, only about 220 days.
The shaping method of Ailanthus altissima adopts the high branch central leadership trunk, and the shaping belt is 3 ~ 4 meters.
The height of annual seedlings can reach more than 1 meter. Because the buds are strong, when cultivating the trunk, peel off the buds and leave a few auxiliary branches.
After reaching the height of branches, cultivate skeleton branches such as main branches and secondary main branches, gradually remove auxiliary branches and redundant branches, and cultivate for 3-4 years to form.
After the formation of Ailanthus altissima, due to the lack of terminal buds and more skeleton branches, the central leadership will gradually decline, so it is beneficial to expand the crown.
The planting, maintenance and pruning time of Ailanthus altissima is suitable in winter.
No maintenance and pruning, very simple. Except for a few miscellaneous branches, the sprouting branches are mainly pruned.