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If it is planted for a long time, the distance between the rows of elm trees should be about 4x6 meters; If it is a propagation of green seedlings, the distance between the rows should be about 2x3 meters. If it is used as a street tree.
It is advisable to plant about 5 meters away from the plants.
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Generally about six years.
The fast-growing elm tissue culture seedlings can grow about 4 meters tall in a year, and the growth rate is about 3 times that of ordinary elm. Planting fast-growing elm is a tree species, the annual DBH growth can reach more than centimeters, and it can be planted for more than 6 years, and the average DBH can reach 22 cm thick.
Elm tree growth rate is relatively fast, after 3-5 years of maintenance, the height of the tree is generally 3-6 meters high, it is suitable for planting in deep, fertile, well-drained alluvial soil and loess plateau, like a sunny environment, there is a certain drought tolerance and cold resistance, its root system is developed, strong germination ability, pruning resistance, but not resistant to moisture, watering during the growth period should be appropriate, can not appear waterlogged.
It takes twenty or thirty years or even longer for the little elm tree to grow into a pillar of timber, and people need to keep pruning and repairing it, cutting down the branches, branches, and branches that belong to the side door, getting rid of tree lice and other pests as soon as possible, and don't forget to water in the drought years.
The growing season of the elm tree is mainly in the spring, when it recovers and grows vigorously, and the growth rate is relatively fast, and the growth rate in the autumn is also relatively fast.
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Elm trees can resist dry and cold weather, and are more suitable for planting in the northern leaky areas, and some elm trees also grow in the southern regions, but the growth rate of elm trees growing in the southern regions is very slow. Elm has the characteristics of cold tolerance, drought tolerance, barren and thin resistance, and has no strict requirements for soil, but it is most suitable for growing in deep, fertile and well-drained alluvial soil.
Elm is also known as elm, is a deciduous tree, can grow up to 25 meters, then elm is suitable for planting in the south or north, in fact, elm is more suitable for planting in the north, but some of the few varieties are also planted in the south. The reason why the elm tree is suitable for cultivation in the northern regions is that it is resistant to dry and cold weather.
In general, elm trees planted in the south grow more slowly, and the elm trees grown in the south are mostly distributed in the southwest and the lower reaches of the Yangtze River, and are rarely planted in other areas. Elm trees are very adaptable, do not have high requirements for the environment, and mostly grow on mountain slopes, sand hills, hills and other places at an altitude of 1000 to 2500 meters.
Elm trees are masculine species and have a high demand for light, so in order for elm trees to grow well, it is best to plant them in a windy and well-lit environment. The elm tree is cold-tolerant, drought-tolerant, barren-tolerant, and it grows quickly and has a long lifespan, with the oldest elm tree having lived for 548 years.
Elm trees do not have strict soil requirements and can grow in moderately saline soils, but elm trees that grow in deep, fertile, well-drained alluvial soils and the upper Loess Plateau grow better. The fruit of the elm tree can be used as a medicinal material, which has the effect of calming the nerves and strengthening the spleen, and can be used for insomnia, loss of appetite and other symptoms.
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1. Planting time.
The best time to plant elm is in mid-April every year, because the temperature at this time is stable above 10 degrees, which is conducive to improving the germination rate of elm trees, but the specific planting time needs to be adjusted according to the local weather conditions and ecological environment, and it is best to sow seeds when the weather is clear and windless.
2. Soil conditions.
Elm trees are suitable for growing in sandy loam soil with thick soil layer, when planting elm trees, it is necessary to choose soil with good drainage and air permeability, and plough the land to make it softer, and then apply well-rotted organic fertilizer to the soil to improve the organic matter in the soil and promote the vigorous growth of elm trees.
3. Planting method.
When planting elm trees, you need to take the seeds that turn yellow-white from the 15-30-year-old mother tree, and then remove the seed wings on the seeds to avoid damaging the seeds, and then you can sow them on the soil surface, wait for 10-15 days, the elm can emerge, and then apply nitrogen, phosphorus and potassium compound fertilizer for it.
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Introduction to elm growth.
It has wide adaptability to soil and climate, and is distributed in Heilongjiang, Jilin, Liaoning, Hebei, Shandong, Shanxi, Inner Mongolia, Shaanxi, Ningxia, Gansu, Xinjiang, Tibet, Sichuan and other regions.
Elm growth cycle.
Elm is a masculine tree species, light-loving, drought-tolerant, cold-tolerant, and barren-tolerant. It is suitable for planting on deep, fertile and well-drained alluvial soil, which is afraid of waterlogging, has a developed root system, strong wind resistance and strong soil retention ability. Elm trees have a long growth cycle and generally take 30-40 years to become wood.
The elm tree grows slowly over time, so it can be sown or cut down. If it is sown, it takes a long time to sow it. If it is cut, the time will be shortened, and it will sprout and take root in no time.
Pay attention to water and fertilizer management in the later stage.
Elm growth rate.
Temperature management: Elm trees prefer a warm, sunny environment and have a wide adaptability to temperature, but it is better to have a temperature above 0 degrees in winter to avoid frost damage and affect their growth. Fertilization Management:
During the growth period, apply thin organic fertilizer or cake fertilizer water every 10-15 days, and apply it in combination with nitrogen, phosphorus and potassium. About 10 days before entering the house in winter, top dressing is needed to improve cold resistance and help it survive the winter.
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Buy an elm sapling, dig a 50 cm square pit, plant it, soil it, and water it.
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Elm bonsai likes to grow in a sunny environment, it is relatively cold and drought resistant, but it is not resistant to water and moisture, and can quickly adapt to dry and cool climates. It likes to grow in fertile, moist and well-drained soil, and can also grow in relatively arid and barren light saline-alkali soil, its vitality is very strong, and the growth rate is also very fast.
The height of the 30-year-old elm bonsai is generally 17m, the diameter at breast height is 42cm, and its growth life can reach more than 100 years. Moreover, the germination ability of the elm tree is particularly strong, it can be pruned frequently, the lateral roots are relatively developed, and the roots grow relatively deep, with the ability to retain soil and resist wind, and it has a relatively strong resistance to toxic gases such as soot and hydrogen fluoride.
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Born on mountain slopes, valleys, rivers, hills and sand hills below 1000-2500 meters above sea level.
Positive tree species, light-loving, drought-tolerant, cold-tolerant, barren-tolerant, soil-free, very adaptable. The root system is well developed, and the wind resistance and soil retention are strong. Strong germination and resistance to pruning.
Fast growth and long lifespan. It can tolerate dry and cold climates and moderate salinity, but not water and humidity (can withstand waterlogging in the rainy season). It has anti-pollution and strong foliar dust retention ability.
It grows well in deep, fertile, well-drained alluvial soils and Loess Plateau. It can be used for afforestation or "four-side" greening tree species in the Northwest Desert, North China and Huaibei Plain, hills and Northeast barren mountains, sandy land and coastal saline-alkali land.
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