What are the arbor plants?

Arbor refers to a tall tree with an independent trunk from the root, and the trunk and crown are clearly distinguished. Trees have upright trunks, and woody plants that are usually six meters to tens of meters high are called trees. Its trees are often very tall, with obvious tall trunks. Common trees are Lagerstroemia indica, cherry tree, geranium, osmanthus tree and banyan tree. Their plant shapes are relatively neat, their vitality is relatively strong, and they are also resistant to pollution. Osmanthus fragrans, geranium, cherry trees and crape myrtle will also bloom, and the flowers are also very bright and have high ornamental value. According to its height, it can be divided into four grades: Wei Qiao, Da Qiao, Zhongqiao and Xiaoqiao. The main tree species in China are evergreen conifers and deciduous broad-leaved trees.

Evergreen conifers: 1. Metasequoia, Metasequoia, deciduous trees, 35m high, 2.5m thick, with a pointed young crown. The bark is grayish brown. Living fossil; 2. Picea, Picea of Pinaceae. It is a unique tree species in China. The root system is shallow, the main root is not obvious, and the lateral root is developed; 3. Cedar, Cedar of Pinaceae. Cold-tolerant and light-loving tree species. Smoke resistance and wind resistance are very poor. Shallow root tree species; 4. Pinus tabulaeformis, Pinaceae pine. Originated in China. Strong cold resistance. The root system is developed. Resist soil drought. I prefer slightly acidic and neutral soil to saline-alkali soil. Young trees grow slowly; 5. Pinus bungeana, Pinus of Pinaceae. It can still adapt to the dry and cold climate of -30℃ and the soil with pH of 7.5 ~ 8. Poor drainage or stagnant water can't grow. The main roots are long and the lateral roots are scarce, so the roots should be less damaged when transplanting; 6. Platycladus orientalis. This is unique to China. Evergreen trees, 20 meters high, DBH 1 meter. Mild saline-alkali land can grow normally. Long life. The taproot is not obvious, and the lateral root is developed. Weak waterlogging tolerance. 7. Sabina vulgaris, Sabina of Cupressaceae. Trees. It is 20 meters high and 3.5 meters in diameter at breast height. I like light, but I have a strong shade tolerance. Cold and heat resistant. Long life. Resistant to many harmful gases. It is widely used in gardens and is superior to Platycladus orientalis as a hedge. There are as many as 60 cultivated varieties; 8. Cypress and Sabina vulgaris of the family Cyperaceae. The tree is cylindrical, with slightly thin and twisted branchlets, which are densely covered with scales and leaves.

Deciduous broad-leaved trees are: 1. Excellent clones of Populus tomentosa were bred by Chinese Academy of Forestry 1987. Fast growth, good tree quality and strong adaptability. Suitable for urban and rural greening, timber tree species, all male; 2. A clone of Populus deltoides with narrow crown, a hybrid of Populus deltoides and Populus deltoides. Fast growth, the trunk is obviously perfect and straight. The crown surface is narrow, which is conventional 1/2-2/3. Female, rarely flowering. Suitable for forest network, passage and intercropping. 3. The trunk of Populus deltoides clones with narrow crown is straight. Cutting propagation, male. It has certain salt tolerance. Suitable for intercropping, forest net and high-yield forest. The narrow crown is obvious; 4. Shanhaiguan poplar and black poplar are cultivated varieties of European and American poplars. 1972 has been named. Drought tolerance, low humidity and light saline-alkali land, hilly valley beach, outstanding ability to resist pests and diseases; 5. Chinese white poplar, Chinese white poplar. Leaf color changes in three seasons and four seasons, which has high ornamental value.