Green rare tree species-Robinia pseudoacacia

Robinia pseudoacacia is a small deciduous tree or shrub-like tree, which is crossbred by American Phnom Penh Robinia pseudoacacia and Robinia pseudoacacia. Wide adaptability, vigorous growth, strong resistance, drought resistance, high temperature resistance. The plant height is 3 ~ 4 meters, and the leaflet is 5-7 pairs. Flowering in the middle of July every year, one leaf inflorescence, each inflorescence 7-12, blooming from bottom to top, blooming constantly, fewer leaves and more flowers. Flowers like wax plum, full of tree flowers, buds such as golden beans, flowers such as golden butterflies, pods belong to the legume family. Exuberant growth, luxuriant branches, large and bright flowers, golden flowers, so it has the laudatory name of "Jubao Golden Tree". The frost comes, the hospitality does not decline, the fallen leaves do not fall flowers, filling the gap of no ornamental flowers and trees in early winter, the taste is quite high.

Robinia pseudoacacia is evergreen in the subtropics, so it is suitable to be planted on land where the temperature is higher than-17 ℃ in the south of the Great Wall. Bonsai is made by potted plants in cold areas, and moved into sunny rooms in full bloom in winter.

The plant of Robinia pseudoacacia is strong in nature, and the seedlings with a height of 80cm and 100cm can blossom in one year. The tree is clean, valiant and bright, and is very popular. As the seedling breeding is not on the scale, the greening of towns, streets and parks is still rare, which is a rare species.

Main points of cultivation: the best cultivated soil is loam or sandy loam with good drainage and plenty of sunshine. In the prosperous period, topdressing was done every 1-2 months, and pruning and plastic surgery was done from the end of winter to early spring. The aged plants should be strongly cut to promote the regeneration of branches and achieve the purpose of multi-flower propagation.

Potted plants: large pots larger than 33 cm should be selected to cultivate loose and fertile soil and can be shaped and pruned according to hobbies. Avoid flooding, drought tolerance, the suitable temperature for growth is 15: 33 ℃.

Propagation: seed sowing mainly, can be cuttage, cut the Lignification branches of the same year, soak the branches with 50 mg / kg rooting powder for 2 hours and then cut them for 3 hours, which should be carried out in spring or early summer, the seedling bed should be kept moist and easy to root.