Here is a brief introduction of Sophora japonica for your reference.
1. Is Robinia pseudoacacia a tree or a shrub? Robinia pseudoacacia is a deciduous tree.
It is 25 meters high, DBH 1 m, the crown is nearly oval, the branchlets are smooth and brittle, and there are often two stipules with different sizes and hardness at the base of the total petiole.
Odd pinnate compound leaves, alternate, elliptic leaflets, obtuse and concave apex.
Robinia pseudoacacia has flat rectangular pods and kidney-shaped black seeds.
The flowering period is May, and the fruit is mature165438+1October.
Second, ecological habits Robinia pseudoacacia is a strong positive tree, which is not tolerant to shade, even seedlings are not tolerant to shade. It grows well and the trunk is straight in the area where the annual average temperature is 8- 14℃ and the annual rainfall is 500-900 mm; However, in the hot and humid climate in the south, the growth is poor and the trunk is low and bent.
Robinia pseudoacacia is barren-tolerant, because rhizobia can increase nitrogen in the soil; Drought-resistant, waterlogging-resistant, stagnant water or places with too high underground standards often cause rotten roots and dead branches.
It grows well on calcareous soil, and can grow on acidic soil, neutral soil and mild saline-alkali soil.
Third, the cultivation and management of Robinia pseudoacacia is propagated by sowing, cutting, rooting, dividing and grafting, but sowing is the main method.
Transplanting should be carried out after defoliation in autumn and before germination in spring, without soil balls and with mud at the roots of trees.
Because the root system is shallow, attention should be paid to crown pruning in peacetime management to reduce pressure, erect pillars and enhance wind resistance.
Robinia pseudoacacia has strong germination ability and developed rhizome, and it is easy to germinate after being damaged.
Strong soil and water conservation ability and short service life.
The root system is shallow and the lateral roots are developed, but they are mostly distributed in the topsoil of 20-30 cm, which is easy to be blown down and broken at the water temperature and tuyere.
Fourth, the garden use Robinia pseudoacacia is tall and dense. Can be used as shade trees and street trees. Because of its strong anti-pollution ability, it is suitable for the greening of surrounding areas and factories, and it is also an excellent nectar source tree species; Pruning-resistant and prickly, it can be used as a defensive hedge.
Thorn is a shallow-rooted tree species, so greening should prevent the wind from falling down.