What is the development prospect of ash tree?

The ash tree market has a good development prospect and belongs to one of several kinds of saplings with the most economic prospect!

20 promising greening tree species: improved Fraxinus mandshurica and Fraxinus mandshurica. It has the excellent characteristics of lush foliage, beautiful tree shape, developed root system, rapid growth, humidity resistance, saline-alkali resistance, pest resistance and pollution resistance, and is an excellent tree species for urban greening. Including two excellent clones. Among them, yuanwax 1 has the characteristics of long green period, beautiful tree shape, few big branches, rich and slender branchlets, narrow and smooth leaves and fast growth, which is suitable for urban greening. Because the green period is long and the new branches are light green, it will add a piece of greenery to the city in late autumn and prolong the protection and ecological benefits of trees, which is deeply loved by people. B9207 has the characteristics of fast growth, straight trunk, smooth bark, shiny leaves and obvious trunk, and is an excellent tree species for street trees and saline-alkali land greening. Because of its fast growth and early germination, it can form a green landscape in advance and obtain protection benefits earlier. Coupled with the obvious dryness, beautiful tree shape and neat forest belt, the beautification effect of urban streets is greatly increased and the greening level is improved. In order to maintain the characteristics of excellent clones, grafting asexual propagation is adopted.

Sowing seedlings in spring, strengthening management, and budding with xylem with a diameter of 0.4 cm or more in autumn of that year. This method has high survival rate and high reproduction coefficient. The compatible seedlings can be transplanted to the field in winter or the following spring. In the vertical spring, when the sap begins to flow back, the anvil is cut. It is divided into two steps. The first step is to cut it flat at 20 cm ~ 30 cm above the grafting site (to ensure that a large amount of juice flows back and the grafted buds recover their activity). The second time, when the bud began to germinate, it was cut off at 0.5 cm ~ 1 cm above the grafting site. At the same time, unbind. After unbinding, in order to reduce nutrient consumption and ensure the normal growth of grafted buds, we should actively do a good job of accelerating buds. After the seedlings are fixed, it is necessary to strengthen the management of seedlings, in addition to adequate fertilizer and water, timely intertillage, weeding and pest control. In this way, its excellent characteristics can be revealed. Photinia rubra is a small evergreen tree, named after its red buds and tender leaves.

The young leaves of the new shoots of Photinia rubra are bright red and persistent, and the old leaves are dark green and full of vitality. The fruit sequence is also red, and it is red and green in autumn and winter, which is of great ornamental value. It is a rare ornamental colorful leaf tree species in the red leaf series of greening trees. Gardens are widely used, or clustered in large hedgerows and curtain walls, or used as solitary plants and potted plants. When the hedge or curtain wall is red, it gives people a dazzling, gorgeous and energetic aesthetic feeling. At the same time, because of its strong germination and pruning resistance, it can have bright flame-like red in the Yellow River basin and its south almost all year round, thus prolonging the viewing period.

Photinia rubra has low requirements on the growth environment. It is barren, salt-tolerant, drought-tolerant, low-temperature-tolerant, adaptable and easy to transplant, and suitable for planting in most areas of China. It has been widely used abroad, especially in Europe and America, but it is still a brand-new variety in China. It is estimated that the domestic market demand will reach more than10 billion plants in recent years, but the available quantity is scarce at present, which is far from meeting the needs of growers and garden applications. The market prospect is very broad and the development potential is huge.

Euonymus fortunei is an evergreen broad-leaved plant of Celastraceae. Leaves opposite, leathery. Because of different varieties, the tree shape and leaf shape are quite different. According to the growth form of its stem, it can be divided into vertical growth type, creeping growth type and creeping growth type; According to the shape of its leaves, it can be divided into Euonymus macrophylla, Euonymus globosa, Euonymus rugulosa and Euonymus microphylla. In winter, the leaves of most varieties turn reddish brown, and the leaves of a few varieties turn green in winter.

Euonymus fortunei is a wild tree species in China, which is evergreen all the year round. It is an evergreen broad-leaved tree ground cover plant, which is suitable for open cultivation in northern China. Cold resistance, drought resistance, pollution resistance, strong shade and salt tolerance, strong adaptability to soil, and good growth in saline-alkali land in the middle and lower reaches of the Yellow River; Fast growth, strong germination, extremely resistant to pruning and fast forming; Strong climbing and creeping; Propagation is easy, and the survival rate of cutting propagation is generally above 98%.

Euonymus fortunei has developed fibrous root system, drought tolerance, easy survival and strong soil conservation ability. It can be planted in all seasons except in winter, and the survival rate is high.

Euonymus fortunei is a strongly positive tree species with strong resistance to shading. It can still grow normally under the condition of shading 70%, and can be used as open-air ground cover and undergrowth ground cover.

The regeneration ability is strong, and the growth rate is obviously faster than that of Ilex pubescens and Buxus microphylla. After pruning, the opposite buds are easy to germinate into strips, forming a dense crown, and there will be no residual crowns and bare legs. Pruning can be done many times a year and can be trimmed into various shapes.

Euonymus fortunei has a wide range of uses, and can be planted singly, in clusters, in strips, in blocks and in sheets. Used for plane greening, vertical greening and three-dimensional greening. It is not only one of the first choice tree species for plane greening such as hedges, green balls, green beds, green blocks and patterns, but also a vertical greening evergreen tree species covering walls, altar edges, rocks and rock surfaces or climbing on trunks, lattices and scaffolding. Creeping growth type, extensive management and low cost, is an evergreen ground cover plant to replace lawn, and is an ideal ground cover plant for slope protection and road protection of large squares, green spaces, highways and railways.

Since the implementation of "Euonymus fortunei Greening and Beautifying Project" in Zibo, Euonymus fortunei has gradually replaced Ilex japonicus and Euonymus microphylla, and has been applied to urban and rural landscaping in Zibo, which has achieved good greening and beautifying effects and formed local greening characteristics in Zibo, and has been affirmed by domestic experts and scholars. People always think that Euonymus fortunei has a very broad application prospect in future urban greening. At present, it has been widely used in landscaping in Shandong, Shanxi, Shaanxi, Henan, Hebei, Beijing, Tianjin and other places. Dahongli

Dahong pear is a small deciduous tree or shrub in Rosaceae. Branches are purplish red or red, leaves are round or oval, leaves are bright red, the surface is waxy, and the back is bright red. The new leaves are especially bright red. The flowers are red, and the flowering period is April-May. After flowering, it can bear fruit. The fruit looks like a plum, bright red and very lovely. Big red plum is dry, vigorous, branching and suitable for modeling. Like sunshine, the climate is warm and humid, and it is relatively cold-resistant. It can grow in all kinds of soil. Shallow root system, afraid of waterlogging.

Red pears can be used in various forms of greening and beautification projects, and can be planted alone on roadsides, flower beds and lawns, or in clusters or parks. After the leaves germinate and grow, they are bright red, like red clouds surging. You can also point it between green leaves and grass, and you will feel a little red in the middle of evergreen trees. Red plums can also be trimmed into balls, like torches, bright and lovely, or potted.

The propagation of red plum mainly includes grafting or cutting. Peach, apricot and plum can be used for grafting rootstocks. Grafting can be done in spring, summer and autumn. Methods include split grafting, double tongue grafting and bud grafting. It can also be propagated by high grafting and head changing. This method has the advantages of fast formation, large growth and good effect. In autumn, the cuttings are mainly cut in the arch shed or in the green branches, and the survival rate is 70% ~ 90%. The planting density of red Li Chengmiao is generally 2000 ~ 2500 plants per mu, which can be used for greening projects in two years.

Dahongmei is a substitute for purple leaf plum and red leaf plum. The development space is relatively large. It should attract the attention of colleagues. In order to obtain the tender yellow branches of Jinzhai willow, and the male clones of Jinzhai willow with drooping main branches, large branch angles, slender wicker, naturally curved trunk and elegant appearance, the first choice tree species of street trees-Jinzhai willow J950 1 was obtained by cross breeding with Vitamin female parent of Jinzhai and Vitamin male parent of Jinzhai. 1995 selects the hyphen of Jinza J950 1. The characteristics of this serial number are: (1) The color of winter strips is yellower and brighter than that of weeping willow J842; (2) The branching angle is obviously larger than that of weeping willow. (3) The leaf shape is wide and lanceolate, which is different from weeping willow. (4) Bark: annual seedlings, the trunk is basically cork, and the bark of the trunk for more than two years is all cork and reddish brown. Different from the smooth bark of weeping willow young trees, the bark of five-year-old trees is grayish yellow and white; (5) male. The words on it are easy to read. This series of trunks are cork, showing resistance to mechanical damage and decay. Cutting has high survival rate, likes fertilizer and water, and grows fast. It has been introduced in Shandong Province and several cities in northern Jiangsu Province, which can adapt to the conditions of the introduction area, grow well and have a certain batch. It has been used for landscaping. This series number is the leader of the golden weeping willow series, which is very competitive and has broad prospects. Weeping willow with golden thread is one of the main greening ornamental trees with great development potential at present, especially in the future, whether it is landscaping or street trees. Fraxinus mandshurica, a fast-growing deciduous tree native to Europe, has been widely introduced in the middle and lower reaches of the Yangtze River in China. Rapid growth, towering trunk, spreading branches, large shady leaves, large shaded area, irregular peeling of bark in white-green, smooth and beautiful, strong resistance to smoke and pollution, strong resistance to strong pruning, strong branching ability and less pests and diseases. It is an excellent street tree and one of the first choice trees for urban and rural street greening. Platanus acerifolia is a light-loving tree species, which is not tolerant of shade and likes warm and humid climate. It is suitable for slightly acidic or neutral soil and can also grow on slightly alkaline or calcareous soil, but it is prone to yellow leaf disease. It is cold-resistant, and all parts of southern Beijing can safely spend the winter.

Sowing and cutting can be done. Sow in spring after the late frost period, sow the seeds, soak the seeds in cold water to accelerate germination before sowing, and cover the seedbed with fine loess mixed with plant ash, and the thickness is suitable for faintly visible seeds; Then cover with thin grass or rice husk, pine needles, etc. Because the germination rate of the field nursery is only 2 ~ 3%, it is necessary to plant and sow closely, and the sowing amount per mu is 10 kg ~ 15 kg. The seedbed should be kept moist during germination. After most seeds germinate and are unearthed, the weeding cover should be gradually removed and the shade shed should be set up in time. When the four true leaves are formed and the seedling base is gradually lignified, they can be pulled out. Divide the seedlings into two or three times, and finally control the plant spacing at about 15cm, with 40 to 50 plants per square meter. One-year-old seedlings can reach 1 m high, and can be transplanted and cultivated in the second year. Generally cultivated for 3 ~ 4 years, it can be used to plant street trees. Generally, two-year-old seedlings are cut with hard branches, which take root and germinate late and have a high survival rate. Miao Zhuang.

At present, the fast-growing paulownia with few balls has more development prospects. Gleditsia sinensis

Leguminosae, Gleditsia.

Deciduous trees or shrubs. Dry skin grayish black shallow longitudinal crack. The trunk and branches are all conical branches.

Thorn, thorn is thick and hard. Even pinnate compound leaves with 3 ~ 7 pairs of leaflets, the tree is tall and majestic, and it is a long-lived tree. Wood is excellent, and fruit is the main raw material of light industry. The flowers are yellow and white, and the fruit is purple and black, which has certain ornamental value. It is especially suitable for growing on mild saline-alkali soil, and it is a green tree species selected on saline-alkali soil.

Because the seed coat is thick and difficult to absorb water, the seed treatment methods are as follows: (1) soak the seeds in 98% concentrated sulfuric acid for about 50 minutes, then rinse them with plenty of water, then soak them in 45% water for 48 hours, change the water once in the middle, and then mix them with sand to accelerate germination; (2) Soak the seeds in boiling water of 90 degrees for 24 hours, keep stirring at the beginning, and stop stirring when the temperature drops to about 50 degrees. The next day, the seeds that absorb water are picked out, and the seeds that do not absorb water are treated again and repeated several times until all the seeds absorb water. Mix the treated seeds with three times of sand to accelerate germination. When sowing, the row spacing is 20 ~ 25 cm, and the covering thickness is 3 ~ 5 cm. When the seedling height is about 10 cm, it is necessary to fix the seedlings, and the spacing between plants is 10 cm ~ 15 cm. Transplant in March in spring, pour antifreeze water before freezing, and coat the trunk with white clay for winter. The height of annual seedlings can reach 50 cm ~ 100 cm. Silkworm family: Celastraceae, Celastraceae.

Small deciduous tree with gray bark and longitudinal cracks. Branchlets green, quadrangular, glabrous. The leaves are opposite, oval, and the edges are sharply serrated. I like light, cool, warm climate and fertile and moist soil. Seeds can be used to make soap, bark and roots can be used as medicine, and wood can be used for carving and fine work. Green flowers and red fruits are excellent ornamental tree species in gardens. You can graft evergreen trees such as Euonymus japonicus and Euonymus fortunei in Hokkaido. The evergreen tree species of Celastraceae is a rare evergreen broad-leaved tree species in our province after grafting with silk cotton wood, especially after grafting with lianas, it will become a rare evergreen inverted tree species in northern China.

The outer bread of the seed has oil, and the seed has dormancy. Remove the outside oil before breeding, and then store it in sand. The method of degreasing is to soak in alkaline water first, and then mix and knead with plant ash. Soak the seeds for 48 hours after degreasing, and then mix them with wet sand three times the size of the seeds. After accumulating sand for 60 days, accelerate germination and sow.

Silk cotton wood can also be propagated by cutting. It can be cut into 1.2cm segments with annual length, and directly cutted after rooting. Male Populus tomentosa is a tall deciduous tree, which belongs to Populus of Salicaceae and is dioecious. Bark is smooth, light green or turquoise, with diamond-shaped lenticels, scattered or strip-shaped distribution; Leaves are heart-shaped, leathery, with white fluff on the back and irregular serrations on the edge; The trunk is straight and complete, and the tree is tall. It is a unique native tree species in China, mainly distributed in Huanghuai River Basin, with a distribution area of over 6,543,800 square kilometers. It is the main afforestation tree species in northern China.

Male Populus tomentosa is a series of varieties or clones screened by extensive provenance collection and clone determination in recent years, which has the characteristics of fast growth, excellent wood properties, high wood yield, strong resistance to pests and diseases, strong pollution resistance, beautiful tree body, clear crown, late defoliation and long life. It has no pollution from catkins, is a typical environmental protection tree species, and has high practical value and ornamental value. Mainly suitable for urban greening, road greening, forest or surrounding greening.

There are many male varieties or clones of Populus tomentosa. At present, Lumao 50 and Narrow Crown 3 are widely used in Shandong Province. According to the forest in guanxian nursery and Zouping, some line numbers are prominent, such as 3 1 19, 13 16, 3902, 4 108. Can gradually replace the current species.

In general, the propagation of male Populus tomentosa adopts conventional asexual propagation methods, mainly gun twist grafting and whip grafting cutting. Under special conditions, tissue culture, split grafting, bag grafting, bud grafting, buried cutting or twig cutting can also be used for propagation.

The top 20 hot-spot seedlings are: Photinia fraseri, Magnolia grandiflora, Acer negundo, Metasequoia glyptostroboides, Crataegus pinnatifida, Huangshan Mountain, Wisteria, Cherry Blossom, Acer negundo, Papaya, Persimmon, Acer negundo, Aesculus chinensis, Myrica rubra, Prunus mume and Ligustrum lucidum.

Through the above 20 seedling varieties, we can see some traces of the development of the seedling market. Choosing a certain number of conventional greening trees shows that the market performance is stable and mature varieties are still trusted by the market. Some newly developed seedlings were shortlisted, but it reflected the continuous demand for new varieties in the market; In this case, the choice of non-greening tree species also indicates the change of urban greening concept. In this case, the heat is not only for a certain variety itself, but also reflects the overall situation of the current industry.

It should also be admitted that any hot spot in any industry is not necessarily sustainable, and Miao wood industry is no exception. Among the varieties of seedlings we come into contact with, it is not uncommon to heat first and then cool, and it is even more unusual to cool first and then heat. Although some varieties have attracted much attention in the short term, after the baptism of the market, the demand is either lasting or short-lived, and there are countless examples. Obviously, some of the above seedling varieties are strong, but they are not widely used; Some performed well, but the dosage was decreasing; Some sales have increased, but prices are falling. Therefore, in the case of immature seedling industry in China, the final performance of these seedlings will be determined by the market.