Written by Maggie
Mar 01 2021
Tree of heaven leaf, scientific name Ailanthus altissima, the color is red, long duration, and body tall trees, trees, beautiful appearance, strong resistance, wide adaptability and fast growth, and many other advantages, thus it has the extremely high ornamental value and a wide range of garden use. Tree of heaven can be in urban greening and landscape architecture design configuration and all kinds of garden green space, and in any solitary, avenue system, from the plant, or with other color leaf tree species is tie-in, can try to fly and be the highlight of the landscape.
Tree of Heaven is a variety of Stinaloides cultivated in recent years, which belongs to a new ornamental variety of spring red leaves. The emergence of the tree of heaven has changed the situation that the red-leaf tree species in spring in northern China are mainly shrubs or small trees.
The tree of heaven is tall, the trunk end is straight, with the characteristics of early rapid growth, 8 years old can be as high as 7 meters. In spring, all the leaves are purplish-red (the leaves are deep purplish red, the back and axis of the leaves are bright purplish red), which is called the "whole tree red leaf period". The trees are all red, the canopy is dyed, very spectacular, which is a typical characteristic of Tree of Heaven trees, especially mature trees. After the middle of May, the tree of heaven enters the flowering season, and the leaf color gradually changes from purplish red to brownish red, and then to brownish green, until the middle of June, it completely changes to dark green. With the growth of the autumn shoots, the new leaves at the top of the branches are still bright purple, clusters of red leaves, in the round crown of the tree, as if the hairpin head of the flower branches, this scenery often lasts until mid to late August, known as the "red leaves at the top of the branches".
The crown shape of the tree of heaven gradually becomes oblate and spherical, and on the whole, it is plump, regular, more beautiful and more ornamental than the common Chinese toona. Tree of heaven is a male unisexual plant, conical inflorescences, erect terminal, about 30 cm long, the color of light yellow. The flowers on the inflorescence of the tree of heaven, all are unisexual male flowers, flowering but not fruiting.
The tree of heaven has the characteristics of drought resistance, cold resistance, and resistance, salt and alkali resistance, dust resistance and fewer diseases and insect pests. Almost all types of soils are suitable for growth except heavy clay and watery wetlands. Especially in the deep soil, well-drained and fertile wet soil growth is better.
Tree of heaven has natural adaptability to the climatic environment in the suitable area and can be widely planted in North China, Northwest China and some parts of Northeast China.
Tree of heaven only unisexual male flowers, flowering but not fruiting, can only be used asexual reproduction.
The roots can produce adventitious buds, which become tillers after germination. Tiler seedlings generally have fewer roots and different heights of seedlings. Generally, seedlings are classified, planted in the nursery and cultivated for one year, so as to become qualified seedlings for afforestation.
The roots were planted and propagated in a robust segment, up to 18 cm long. The lower incision was oblique and the upper incision was flat to distinguish the upper from the lower and prevent the upside-down. Generally, the root cuttings are soft, and the method of slanting is adopted, and the incision is flush with the ground.
Cut reproduction selection of fully lignified one-year bud cuttings as cuttings, cuttings 25-30 cm long, upper and lower are flat mouth, the best use of ridge oblique insertion, and cover with plastic film, in order to keep heat preservation, moisture, improve the survival rate.
The dry base has germination ability, the dry shape is not good, can be leveling stubble, choose to keep strong sprouts to cultivate into large seedlings, or seedlings, leveling the land, the roots in the soil can also sprout into seedlings, but the density is uneven, seedling growth is not neat, need thinning to fill the gap.
In the spring, the seeds of The tree of heaven were sown in the open ground to get the seedlings. The germination was grafted with Tree of Heaven panicle strips, and the survival rate was over 90%. Additionally, the early spring season also can be stellar thus big seedlings (or trees) on undertaking high connect change ahead (split connect) or undertake bud to connect in summer and autumn season. The effect of grafting seedling of heaven is very good.
The propagation method can not only maintain the excellent character of Tree of Heaven, but also accelerate the propagation speed. During the vigorous growth period of Tree of Heaven, young stem segments were cut from the tree body, and clusters of shoots were induced on the medium. After sub-generation proliferation and rooting culture, a large number of robust rooting seedlings were obtained. Transplant the rooting seedlings into a vegetative bowl containing vermiculite for domestication and cultivation. Transplant them in the garden about 45 days after the plants have grown to 10-15 cm.
The grafting of Tree of Heaven and Stinky Toons reduces the cost first. Because it is easy to breed, it can breed in large quantities when it has a small amount of tree of heaven. Secondly, using the method of high replacement head, can shorten the timbering time, speed up the reproduction speed, this excellent color leaf tree as soon as possible to apply to the landscape.
1, grafting time: Tree of Heaven grafting time requirements are not strict, spring, summer and autumn can be.
2, grafting method: spring with wooden bud grafting, the survival rate can reach about 90%, the growth height of more than 3 meters, the dry diameter of more than 2 centimeters. Summer with wooden bud, the survival rate can reach more than 90%. Grafting place in the stock more than 30 cm, grafting bud site to leave more leaves below, grafting bud above 5 cm, the rest of the cut, after 15 days or so untied rope. Grafting with woody buds on the branches of the same year in mid-late September in autumn also had a higher survival rate. Grafting should be careful to avoid rainy days.
3, after grafting management: to erase the new bud after grafting in time. The seedling should pay attention to underground pests, which can be in irrigation, with insecticide with water. The stink bug is the main pest of the stink bug. It harms the leaves of The tree of heaven and causes the leaf tip to curl. We can spray 40.7% of Lexbourne emulsion 1600 times liquid, or 25% of Mixes emulsion 1000 times liquid control, a small amount can be captured artificially.
Tree of heaven has natural adaptability to the climate and environment in the suitable area. The tree of heaven can be widely cultivated in most areas of North China, Northwest China and Northeast China. The tree of heaven is especially suitable for the greening on both sides of the north street; Air purification of industrial and mining enterprises; Beautification of organs and institutions; In the park, villa, residential area, can be line planting but also group planting.
Tree of Heaven and the mixed forest can make full use of space and nutrient area, give full play to the protection benefits, enhance the ability to resist natural disasters, improve site conditions, and improve the quantity and quality of forest products.
Tree of Heaven not only has distinct garden characteristics but also has outstanding ecological advantages.