First, what are the characteristics of a good street tree
1. In the alternating environment and on the barren soil, it can grow robustly.
2. There is no need to prune, spray and pick the leaves.
3. The leaves can not change brown or scorch under the high-intensity reflective sunlight.
4, dust, smoke, toxic gases, salty sewage, gasoline, etc. have little or no impact on it.
5. The damage caused by various mechanical equipment can be quickly recovered.
6. Can resist damage caused by ice storms and storms.
7, should have eye-catching flowers, beautiful non-toxic fruits, with beautiful autumn colors and beautiful winter state.
8, should be dry and beautiful, the landscape is lasting.
9, the tree species can be quickly restored after transplantation, its root system will not raise the sidewalk or block useful underground pipes.
10, in addition to the unpredictable situation, they are expected to live at least 30-40 years.
Second, the most promising excellent street tree species recommended
ginkgo
The status of the ginkgo tree is needless to say in today's seedling industry. As a well-known "living fossil of plants", the status of ginkgo biloba trees can be said to have never been shaken, especially as a stable development of colored leaf tree species today, the prospects of ginkgo trees are still broad.
Ginkgo tree has strong adaptability, can be planted in the north and south, and in China's culture, ginkgo is a symbol of longevity and wealth, and it can often be seen in temples and scenic spots. Ginkgo biloba trees not only have high ornamental value, but also have high medicinal, timber and edible value. In terms of ecological value, it is an excellent variety of farmland shelter forest, river revetment forest, village shelter forest, highway and railway shelter forest and urban sidewalk greening, especially in autumn, its yellow and brilliant leaf color has become a unique color in the green forest.
At present, the ginkgo market continues to ferment, there are more small and medium-sized in the market, large-scale prices remain high, and the status is still very high.
sycamore
Plane tree can be described as a high-value tree species in the street tree, the tree type is tall, leafy, graceful posture, rapid growth, easy to survive, resistant to pruning, can absorb harmful gases, resist smoke and dust, anti-noise, so it is widely planted as a sidewalk greening tree species, but also for fast-growing timber tree species. However, it should be noted that the root system of plane tree is shallow, and it is susceptible to damage and inverted during typhoons, which is not suitable for coastal areas.
In China's seedling industry, plane trees are often collectively referred to as "fa tong", the current market of plane tree varieties are many, the prospect is not optimistic, but the prospect of sycamore is immeasurable.
Luan tree
Luan tree, alias: wood luan, luanhua, etc., is a subfamily, luan tree plant. Luan tree summer yellow flowers full of trees, into the autumn leaves turn yellow, the fruit purple red, shaped like a lantern, very beautiful; Luan tree adaptability is strong, the season phase is obvious, is the ideal greening, foliage tree species. It is suitable for shading trees, street trees and landscape trees, and is known as the "king of street trees" of the new generation. Luan trees are also good tree species planted in industrial pollution areas.
Linden tree
Known as the king of the street tree, the linden tree is still widely cultivated around the world, but the linden tree is generally more popular in Europe, but the domestic popularity is not high. In fact, linden tree is a clean tree species, can effectively eliminate harmful gases, inhibit dust, is an excellent tree species to control smog, especially bran linden, Nanjing linden, silver linden, etc., has a good dust retention effect, a large number of linden trees, will improve the environment to a certain extent.
At present, the market of linden trees in China is gradually broadening, and the prospects are good.
National locust
The national locust is tall and has pinnate compound leaves similar to those of the locust. The flowers are pale yellow and can be cooked and eaten, and can also be used as a traditional Chinese medicine or dye. Originating in China, it is widely cultivated in the northern and southern provinces and regions, especially in North China and the Loess Plateau, and is a good greening tree species, often used as a shade tree and a street tree, and has certain economic value and medicinal value.
In recent years, the production of national locust seedlings has increased rapidly, and the seedlings with a chest diameter of 8 to 10 cm are optimistic about the market and the price is also higher. Chest diameter 7 to 10 cm, good dry shape, after drying there are main branches of the distribution of seedlings, the demand is larger; chest diameter of more than 6 cm, there are larger crown shaped dragon claw locust, golden branch locust seedlings Market is optimistic, the price is also higher.
Goosefoot
It is a famous flowering tree species and a rare plant unique to China. Its tree type is beautiful, the flowers are large and beautiful, and the leaves turn yellow in autumn, and the trees are full of gold, like a yellow coat, so it is also known as a horse coat. It grows rapidly, is resistant to stress, has few pests and diseases, is easy to manage, and can be planted in areas south of the Huai River, and is often used as urban sidewalk greening and courtyard greening.
Catalpa is a clean tree species, which is highly resistant to harmful gases and is an excellent tree species for greening in industrial and mining areas. At the same time, horse coat wood is also a good wood for building and making furniture, and in today's garden development diversity, thrush has a large space for development.
Horse chestnut tree
Horse chestnut tree is also a relatively high value tree species, the trunk is straight, the crown is large and thick, the early summer flowers are full of trees, and the huge white inflorescence is like a gorgeous candlestick, which is impressive, and is an excellent street tree and garden ornamental plant. At the same time, its thick green and large leaves have a strong ability to stagnate dust, sound insulation and absorb harmful gases.
In Europe, America, Japan and other places, the horse chestnut tree is widely cultivated as a street tree, the gardening tree, North America will be safflower or pink flower and heavy petal horse chestnut gardening variations on both sides of the road, when the flowers bloom the scenery is very beautiful. Although the number of species of Horse Chestnut in China is relatively large and widely distributed, most of the tree species are still in the stage of not being properly managed and utilized, and the application of gardens is not widespread, and they are often planted alone or planted in front of buildings and between thin forests.
In fact, horse chestnut is a typical multi-functional tree species, the economic value is also very high, although it is currently in China's landscaping just started, but the advantages of its great potential.
Fraxinus
Ash is light-loving, slightly shade-tolerant, warm and humid climate, quite hardy, wet and waterlogged, and drought tolerant. The soil requirements are not strict, and it can grow on alkaline, neutral and acidic soils. Resistant to soot, strong resistance to sulfur dioxide, chlorine, hydrogen fluoride. Germination and tillering are strong, resistant to pruning, fast growth and long life.
The shape is upright, the trunk is straight, the branches and leaves are luxuriant and bright green, and the autumn leaves are orange and yellow, which are excellent street trees and shade trees; they can be used for lake shore greening and industrial and mining area greening.
paulownia
Paulownia flowers are barrel-shaped, white or purple, and when they fall on their branches, it is the time when early spring is gone and early summer is approaching. As a street tree, paulownia is tall and tall, with lush foliage, fragrant flowers, and rich shade in summer, making it an ideal street tree species.