What are the varieties of elm seeds? What are the methods of raising seedlings?

Elm, also known as spring elm, white elm, etc., is a deciduous tree of Ulmaceae, which is native to China and is mainly distributed in Northeast, North China, Northwest and Southwest provinces. Elm is a tall tree with thick shade, which is often planted as street tree and shade tree. It has strong resistance to sulfur dioxide and chlorine, and is an important tree species for urban greening. Not only that, the species of elm is also very many, wide adaptability, value and use is rich. So what are the varieties of elm seeds? What are the methods of raising seedlings? Let's get to know it.

What are the varieties of elm seeds?

1. Weeping elm: there are many branches, the bark is gray and white, and the crown is umbrella-shaped, which is often used to plant tree species in landscaping. Mainly distributed in Inner Mongolia, Henan, Hebei, Liaoning and Beijing and other places.

2. American elm: deciduous trees, up to 40 meters high, have a strong sense of wood texture and are generally planted only as ornamental elm trees. It is native to the United States and is also cultivated in Jiangsu, Beijing and other places in China.

3. Big fruit elm: deciduous trees or shrubs, up to 20 meters high, hard wood, strong toughness, thick structure, can be used for vehicles, furniture and other materials. Mainly distributed in the three eastern provinces, Hebei, Shandong, northern Jiangsu, Shanxi, Gansu, eastern Qinghai and other places.

4. Ulmus pumila: deciduous trees or shrubs, up to 18 meters high, resistant to drought and cold, can be used as barren mountain afforestation and protective forest species in Northwest China. Mainly distributed in Liaoning, Hebei, Henan, Shanxi, Inner Mongolia, Gansu and Ningxian and other provinces and regions.

5. Red fruit elm: deciduous trees, up to 28 meters high, bark fiber can make ropes and artificial cotton, the lower reaches of the Yangtze River plain and low hilly areas can be selected as "four sides" afforestation tree species. Mainly distributed in southern Anhui, southern Jiangsu, northern Zhejiang and central Sichuan.

6. Ulmus pumila: a deciduous tree, up to 25 meters high, its use is similar to that of Ulmus pumila. It can also be used as an afforestation tree in the limestone mountain area of northern Anhui. It is mainly distributed in Langya Mountain, Chuzhou, Anhui Province, born in the foothills of streams or limestone, and is also cultivated in Nanjing.

What are the methods of raising seedlings?

1. Sowing and seedling raising: in the middle of April, the seeds were collected when the fruit was green and light yellow, and sowed in time after drying, and the soil with good drainage and deep soil layer was selected to apply proper amount of fertilizer, and the bed width was 1.5m, strip sowing, row spacing 30~40cm, covering soil 1~1.5cm after sowing, keeping the seedling bed moist, seedling height 3~5cm and 10~15cm seedling once respectively, timely weeding.

2. Cutting seedlings: cutting can be carried out after falling leaves in autumn and before sprouting in spring. The strong strips above 0.5cm are selected and grafted into cuttings with length of 15~20cm, and the base is cut into Malta shape near the bud hole, which is beneficial to the rooting of cuttings. The row spacing of cuttings is 20 × 30cm. The scion is slightly exposed to the ground, covered with soil and firm, and permeated with water.

Generally speaking, there are many species of elm, and there are some varieties crossed with other saplings. at present, there are about 50 kinds of elm in China. Therefore, before planting elm, we must choose the appropriate seed category for sowing, and then combine with scientific seedling technology to make it thrive.

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