Characteristics of poplar

Poplar is the most common tree in the northwest of China. As long as there is grass, there is the shadow of poplar. Poplar is not very particular about living conditions. Roadside, beside the ridge, where there is loess, there is her survival. She doesn't chase rain, and she doesn't long for sunshine. As long as she can water the hardened land a little, a poplar will take root and sprout. As long as a little space is set aside for weeds to survive, she will decorate the yellow land and hold up a piece of green. She doesn't need to fertilize and water like a delicate lawn. As long as she doesn't use a knife and axe to chop, and gives her a relaxed environment to absorb free air, she will hold her head high. She never rejected the land where she grew up. She is not a vine, rooted in poor soil, happy-go-lucky, otherwise, because she belongs to the grassroots. Although poplar was born in poverty, it is the most concerned about the quality of life. There is still ice in the soil, and the spring breeze is still chilly. Green shoots have sprouted from her branches. Under the heavy pressure, every bud and leaf of her is striving for progress, never bending down to beg, and there is no flattering face. In the autumn wind, although the leaves have been stripped, the thin branches are still full of essence, and the branches stand upright and hold their heads high. In the severe winter, facing the sword, she still stands on the cold yellow land, with proud branches, silent trees and voices. At this time, the noble flowers and plants, however, are in the greenhouse, receiving the nutrients sent to the leaves and roots, lazily killing the bloodless days. Poplar's temperament is civilian, but it is the richest. She can be used as firewood, furniture, purlin and farm tools. Like the yellow land where she grew up, it is unpretentious. In some people's eyes, she will almost forget her existence. But for the barren yellow land, she is a brave person. Throughout the year, she stayed and decorated, which reduced the poverty and loneliness of the yellow land and increased the vividness and beauty, because her roots have been integrated with the yellow land. Poplar did not expect to transplant and migrate, even if her fallen branches and leaves were corroded by soil, it would add some nutrients and vitality to this yellow land. Under the thick loess, the immortal life of poplar is surging, and the yellow land is crisp and green. The sower sowed another poplar, and in a few years, the poplar will become a bigger green again. If the tree is 20 meters high, then the roots are more than 40 meters long.

Poplar is a typical representative of poplar in Salicaceae.

Morphological characteristics of Salicaceae;

Trees or shrubs.

Simple leaves and stipules alternate.

Flowers unisexual, in a panicle.

Every flower has bracts, but no perianth, disk or gland. 2 stamens, pistil 1, ovary 1. Capsule, 2-4-valved, small seeds, many, with long hair at the base.

Identification characteristics of Salicaceae;

Woody, simple leaves alternate with stipules, panicles, no perianth, disk or gland. Capsule with small seeds and long hair at the base.

Characteristics of poplar

The floorboard of deciduous trees in Salicaceae.

There are more than 100 species in this genus, which are mainly distributed in temperate and cold zones in Europe, Asia, North America, Mediterranean countries and the Middle East. There are more than 50 species in China.

Wood is used as civil building materials to produce furniture, matchsticks, sawn timber, etc. And used as wood boards and fiber materials. Leaves are good feed.

Poplar is also the main tree species in timber forest, shelter forest and surrounding greening. Morphological characteristics Poplar twigs have terminal buds, and there are more than two bud scales on the terminal buds.

Simple leaves alternate, ovate or suborbicular. Cattle inflorescence, dioecious, without petals, with annular disk and bracts.

Bracts split at the top and have many stamens. capsule

Small, crested. Distribution and Species of Poplar Resources Poplar is widely distributed in China, from Xinjiang to the eastern coast, from Heilongjiang and Inner Mongolia to the Yangtze River basin in the north.

Poplar is the main afforestation tree species, whether it is shelter forest or timber forest. Especially in recent ten years, the area of poplar plantation in China has been expanding, and it has become the largest country in the world.

The classification system of Populus is divided into five groups, namely, Populus (Leuce), Populus (Tacamahaca), Populus (Aigeiros), Populus (Turanga) and Populus (Leucoides). Yang Ya School of Mountain and Yang Ya School of Yapai Mountain in Bai Yang, P. tremuloides, P. adenopoda, a subgroup of Populus euphratica; Low temperature resistance (40 north latitude); The requirements for soil are not strict; Pure or mixed Betula platyphylla forest can be formed mainly by regeneration of sprouting strips (the survival rate of artificial propagation afforestation is very low). Populus alba has white reverse leaves and special-shaped leaves, which are distributed in countries around the Mediterranean, Central Europe, Eastern Europe, Central Asia and West Asia, and Xinjiang, China. Heat-resistant, high-temperature-resistant, wind-resistant and certain saline-alkali soil.

Arid climate can be anywhere with water; Cutting propagation is easy. Populus Xinjiang is a variety of Populus alba.

Page (abbreviation of page) Populus tomentosa is the hybrid origin of Populus tomentosa (including Populus davidiana, Populus alba, Populus hopeiensis, Populus Xinjiang, etc.) distributed in Central Europe and West Asia. ), and the reproductive organs are not well developed; Unique to China; The content of poplar species in different producing areas is different, forming different provenances. Tree species with long life, good material, good dry shape, rapid growth in the early stage, difficulty in asexual reproduction, low survival rate of afforestation and strong preference for light intensity are affected. Suitable for being around, not cold-resistant, and parts of Liaoning are frozen.

(2) There are two important species of Populus cathayensis abroad, that is, in North America: Populus tomentosa and Populus ainsliaea in western North America. The Great Lakes region of North America is the region with the largest variety of Populus davidiana in China. Latitude from north to south is: Caragana wusuli, Caragana sauvignon, Caragana koreana, Caragana cathayensis, Caragana xiaojianensis and Caragana Sichuan. Populus yunnanensis is a moderately humid poplar, which has strict requirements on ecological and site conditions such as soil humidity and atmospheric humidity, and is easy to be infected with canker. The utilization value is second only to poplar and poplar.

(3) Populus americana is an important tree species. There are only two varieties, Populus americana and Populus europaea.

In China, only the Altai region of Xinjiang has the distribution of Populus deltoides. Delto I Daisy? Pass. var。 Monilifora p. var。 Missouri and P. del. var。 Horned animals are distributed along the Mississippi River in North America. Positive tree species in plain and alluvial soil are not naturally distributed in China, and they are all fast-growing and wood-making materials introduced in the early stage.

There are three varieties from south to north, the subspecies are as follows: branchlets from edge to circle, leaves from big to small and fast, slow growth, variation, early leaves, difficult rooting in the later stage, easy to resist variation and strong disease resistance, and weak. The introduced tree species in China are: 63 poplar, 69 poplar, Shanhaiguan poplar, 50 poplar and 36 poplar. All were introduced from clones of Populus deltoides.

Populus americana * Populus euramericana, as the most important way to improve Populus euramericana, uses its target heterosis to cultivate early-maturing Populus euramericana clones with good dry type, strong asexual reproduction ability and strong relative stress resistance. The successful clones were Populus canadensis, Populus Jian, Populus I-2 14, Populus alba and Populus 72.

(4) There is only one species of Populus euphratica, mainly distributed in Central Asia and West Asia (Mediterranean countries; But Kenya likes light and heat; Can endure extreme drought and long salt life; General seed propagation; Cutting is difficult to take root. The national Populus euphratica forest covers an area of 400,000 hectares. The largest Populus euphratica forest in the world is concentrated in the Tarim River Basin in Xinjiang, China, with a natural forest area of 320,000 hectares, accounting for more than 90% of the national Populus euphratica forest area.

The climatic conditions here are annual precipitation of 30 mm-60 mm, evaporation of 200 mm-3000 mm and extreme temperature of 42℃-30℃. Due to ecological deterioration and man-made destruction, the area of Populus euphratica forest is shrinking day by day (110.5 million hectares per year), and all of them will be cut down within 2 1 year at this rate.

Subjective reasons for the sharp decline of Populus euphratica forest resources 1) Large-scale development and utilization of agriculture and animal husbandry In the early days of the founding of the People's Republic of China, people arbitrarily destroyed forests to open up wasteland; 2) Build a reservoir in the upper reaches of the river and intercept the water source at will, so that the Populus euphratica forest in the middle and lower reaches dies of water shortage. 3) Local residents cut down Populus euphratica forest as firewood fuel.

Developing northwest to protect Populus euphratica forest. The International Poplar Committee has held many meetings, hoping that China can study Populus euphratica systematically and that the State Forestry Administration will study Populus euphratica in the Tenth Five-Year Plan.

Project content: 1) Populus euphratica natural forest protection 2) Populus euphratica resources investigation 3) Populus euphratica excellent provenance, family investigation and superior tree selection 4) Populus euphratica salt-tolerant and drought-resistant mechanism 5) Populus euphratica clonal propagation 6) Populus euphratica hybrid breeding 5) Populus euphratica (Populus tomentosa) is distributed in Hubei. Someone put ciliates in this school.

Four. Renewal of Poplar Varieties in 1950s and 1960s (First Generation) Populus euphratica-(Populus euramericana) Populus euramericana-Populus euramericana varieties. Poplar in Beijing-Populus davidiana (Populus americana)-Populus simonii-Populus simonii.

Characteristics of poplar

Poplar is the most common tree in the northwest of China. As long as there is grass, there is the shadow of poplar.

Poplar is not very particular about living conditions. Roadside, beside the ridge, where there is loess, there is her survival. She doesn't chase rain, and she doesn't long for sunshine. As long as she can water the hardened land a little, a poplar will take root and sprout.

As long as a little space is set aside for weeds to survive, she will decorate the yellow land and hold up a piece of green. She doesn't need to fertilize and water like a delicate lawn. As long as she doesn't use a knife and axe to cut and gives her a relaxed environment to absorb free air, she will hold her head high. She never rejected the land where she grew up.

She is not a vine, rooted in poor soil, happy-go-lucky, otherwise, because she belongs to the grassroots. Although poplar was born in poverty, it is the most concerned about the quality of life.

There is still ice in the soil, and the spring breeze is still chilly. Green shoots have sprouted from her branches. Under the heavy pressure, every bud and leaf of her is striving for progress, never bending down to beg, and there is no flattering face. In the autumn wind, although the leaves have been stripped, the thin branches are still full of essence, and the branches stand upright and hold their heads high.

In the severe winter, facing the sword, she still stands on the cold yellow land, with proud branches, silent trees and voices. At this time, the noble flowers and plants, however, are in the greenhouse, receiving the nutrients sent to the leaves and roots, lazily killing the bloodless days.

Poplar's temperament is civilian, but it is the richest. She can be used as firewood, furniture, purlin and farm tools. Like the yellow land where she grew up, it is unpretentious. In some people's eyes, she will almost forget her existence.

But for the barren yellow land, she is a brave person. Throughout the year, she stayed and decorated, which reduced the poverty and loneliness of the yellow land and increased the vividness and beauty, because her roots have been integrated with the yellow land. Poplar did not expect to transplant and migrate, even if her fallen branches and leaves were corroded by soil, it would add some nutrients and vitality to this yellow land.

Under the thick loess, the immortal life of poplar is surging, and the yellow land is crisp and green. The sower sowed another poplar, and in a few years, the poplar will become a bigger green again.

If the tree is 20 meters high, the roots will grow more than 40 meters. Poplar is a typical representative of poplar in Salicaceae. Morphological characteristics of Salicaceae; Trees or shrubs.

Simple leaves and stipules alternate. Flowers unisexual, in a panicle.

Every flower has bracts, but no perianth, disk or gland. 2 stamens, pistil 1, ovary 1.

Capsule, 2-4-valved, small seeds, many, with long hair at the base. Salicaceae features: woody, single leaf with stipules, catkin, no perianth, disk or gland.

Capsule with small seeds and long hair at the base.

What are the characteristics of poplars?

white poplar

1. Poplar is a typical representative of poplar in Salicaceae.

Morphological characteristics: trees or shrubs. Simple leaves and stipules alternate. Flowers unisexual, in a panicle. Every flower has bracts, but no perianth, disk or gland. 2 stamens, pistil 1, ovary 1. Capsule, 2-4-valved, small seeds, many, with long hair at the base.

Living environment:

Poplar is the most common tree in the northwest of China. As long as there is grass, there is the shadow of poplar. Poplar is not very particular about living conditions. Roadside, beside the ridge, where there is loess, there is her survival. She doesn't chase rain, and she doesn't long for sunshine. As long as she can water the hardened land a little, a poplar will take root and sprout. As long as a little space is set aside for weeds to survive, she will decorate the yellow land and hold up a piece of green. She doesn't need to fertilize and water like a delicate lawn. As long as she doesn't use a knife and axe to chop, and gives her a relaxed environment to absorb free air, she will hold her head high. She never rejected the land where she grew up. She is not a vine, rooted in poor soil, happy-go-lucky, otherwise, because she belongs to the grassroots. Although poplar was born in poverty, it is the most concerned about the quality of life. There is still ice in the soil, and the spring breeze is still chilly. Green shoots have sprouted from her branches. Under the heavy pressure, every bud and leaf of her is striving for progress, never bending down to beg, and there is no flattering face. In the autumn wind, although the leaves have been stripped, the thin branches are still full of essence, and the branches stand upright and hold their heads high. In the severe winter, facing the sword, she still stands on the cold yellow land, with proud branches, silent trees and voices. At this time, the noble flowers and plants, however, are in the greenhouse, receiving the nutrients sent to the leaves and roots, lazily killing the bloodless days.

Living habits:

Poplar's temperament is civilian, but it is the richest. She can be used as firewood, furniture, purlin and farm tools. Like the yellow land where she grew up, it is unpretentious. In some people's eyes, she will almost forget her existence. But for the barren yellow land, she is a brave person. Throughout the year, she stayed and decorated, which reduced the poverty and loneliness of the yellow land and increased the vividness and beauty, because her roots have been integrated with the yellow land. Poplar did not expect to transplant and migrate, even if her fallen branches and leaves were corroded by soil, it would add some nutrients and vitality to this yellow land. Under the thick loess, the immortal life of poplar is surging, and the yellow land is crisp and green.

What are the characteristics of poplars?

Poplar is tall and straight. Poplar has a strong vitality. Poplar is strong, not weak, and unshakable. Poplar is a deciduous tree with a height of15 ~ 30m and a gray bark. This is a very common tree.

Strong viability, roadside, next to the ridge, where there is loess, there is its existence. It can be used as firewood, furniture, purlin and farm tools.

Poplar is a common tree in the northwest of China. As long as there is grass, there is the shadow of poplar. Poplar pays little attention to living conditions. Where there is loess on the roadside and beside the ridge, it is the place where it lives.

It does not pursue rain, nor does it crave sunshine. Even in hard land, as long as you give it a little water, a branch of poplar will take root and sprout. As long as the living space of weeds is removed, it can decorate the yellow land and prop up a piece of green.

It doesn't need artificial fertilization or watering like a delicate lawn. As long as it doesn't cut it down with a knife and axe and gives it a relaxed environment to absorb free air, it will stand upright. Distributed in Europe, North Africa and West Asia; China is mainly distributed in Xinjiang, Inner Mongolia, Hebei, Shanxi, Shaanxi, Liaoning, Shandong, Henan, Ningxia, Gansu, Qinghai, Jiangsu, Anhui, Shanghai, Zhejiang, Jiangxi, Jilin, Heilongjiang, Beijing, Tianjin and other places, and there are also a few places in the southwest such as Sichuan, Chongqing, Guangxi and Yunnan.

What are the characteristics of poplars?

Trees.

Trunk usually ends straight; Bark is smooth or longitudinally dehiscent, usually grayish white. There are terminal buds (Populus euphratica has no buds), and the bud scales are mostly sticky.

Branches are long (including sprouted branches) and short, cylindrical or ridged. Leaves alternate, mostly ovoid, ovoid-lanceolate or triangular-ovoid, and often have different shapes and toothed edges on different branches (such as long branches, short branches and sprouting branches); Petiole is long, lateral flat or cylindrical, with or without glandular points at the top.

Inflorescence droops and leaves often open first; Male inflorescence opens earlier than female inflorescence; Bract apex acute or dehiscent, membranous, caducous, disk tilted cup-shaped; Male flowers have many stamens, inserted in the disk, dark red anthers, short filaments, free; Ovary with short style and dehiscent stigma. The capsule burst.

The seeds are small and numerous, and the cotyledons are oval. Extended data:

Growing environment Poplar is a forest tree species scattered in temperate and cold temperate zones in the northern hemisphere.

In China, it is distributed between 25 ~53 degrees north latitude and 80 ~ 134 degrees east longitude, that is, it is distributed in central China, north China, northwest China and northeast China. The rest of the world is generally distributed in the range of 30 degrees to 72 degrees north latitude.

Poplar (Latin name: Populus L.) belongs to the genus Populus, with about 65,438+000 species. There are about 62 species (including 6 hybrids) in China, of which 57 species are distributed in China and about 4 species are introduced and cultivated. In addition, there are many varieties, variants and introduced strains. The classification system of Populus is divided into five schools: Takamahaka School, Poplar School, Black Poplar School, Turanga School and Poplar School.

Trunk usually ends straight; Bark is smooth or longitudinally dehiscent, usually grayish white. Mainly distributed in Central China, North China, Northwest China, Northeast China and other vast areas.

The industrial utilization of poplar mainly includes: large-diameter poplar is mainly used to produce plywood, laminated veneer lumber and furniture; Small-diameter poplar is used to produce fiberboard, particleboard, paper making and matches. Generally, large plant spacing is used for planting.

In developing countries, close planting is the main method, and the rotation period is short, producing medium-diameter wood for civilian use. There are some transitional types between the two.

Poplar can be widely used in ecological protection forest, three-north protection forest, agriculture and forestry protection forest and industrial timber forest. Poplar is an excellent tree species for road greening and landscape.

Its characteristics are tall and majestic, neatly marked, fast forest formation, sandstorm prevention and waste gas absorption. Plant culture and literature "Little White Poplar", written by Liang Shangquan and composed by Shi Xin.

Yan Weiwen first sang in 1984 Spring Festival Evening. Other Literature: Hu Yangshu and Praise of Poplar.

Legend Story Magpie and Poplar During the Yongle period of the Ming Dynasty, Huang's father and son left Peixian County, Jiangsu Province with tears in their eyes and moved to Lubei Plain, where they settled on the east bank of the Siniumiao River. Plant a small poplar around the bay pit in front of the door.

They grew wildly with joy, and the slender and weak tree in the middle lost at the starting line, unable to catch up with each other step by step. People can live under people, but trees can't grow under trees.

Poor little poplar can only grow slowly by a little sunshine scattered in the dense branches and leaves of big trees. In a few years, the poplars next to it became useful, making the skinny poplars jealous.

Misfortune is a blessing, joy is a worry, and it is excellent. The Huang family expanded their house by adding more people.

The required wood is searched in the forest, and it is dug from the beam to the purlin in turn. Poplar trees were cut down one by one and turned into furniture purlins in the hands of carpenters.

When the young poplar saw the sunshine, it shook its body, grew thick and tall, and finally a nest of magpies flew to settle down. Little poplar is full of joy and pride, and worries come from it.

I survived because of my weakness. Seeing that there are fewer trees bigger than myself every day, bad luck will befall me and I will be unhappy all day. The magpies are also worried about the "violent demolition" they will face.

They are in the same boat and appreciate each other, so let's chat and plan together. Mother Magpie said that I have been to many places and found that people don't cut down locust trees easily.

Poplar said that the locust tree had a good life and took a scary name when it was born. Locusts and wooden ghosts also say that if they grow thick, they can become immortals. For the sake of health, people dare not provoke.

Sophora japonica grows slowly and is not easy to become a useful tree. Our life is cheap, and our name is cheap. It is easy to grow up and become a useful person. People will kill us easily without thinking or scruples.

It's not as good as those jujube pears, which are full of thorns and can't be made into materials, but they are safe. Father Magpie flew all over the north and south, and he was well informed. He said, be content, old Yang Jie. Look at nanmu sandalwood and Huang Huali wood, which is not more expensive than you? Almost completely cut down by humans.

Haven't you heard that "musk deer dies first, and silkworm dies early because of silk"? Let's stop complaining, it's no use complaining. Folklore: Poplar does not have moths, but it will ascend to heaven. Lv Si has a dutiful son. The dutiful son buys his mother something to eat every time he goes out.

His filial piety touched two immortals: Lv Dongbin and Han Zhongli. These two immortals opened a biscuit shop in Lvsi Street, and the biscuits they sold were very strange. There is a big bowl in San Qian, and many people have bought it. He baked it when he sold it, and people who eat morning tea come to buy it every day.

There are also two sesame cakes only the size of copper coins. How much are they? Five yuan each. Someone asked, "well, your big sesame seed cake only costs three yuan, but how come the small one costs five yuan?" Erxian replied, "That's it, I won't buy it.

"He has a truth: it is not too expensive to buy for the elderly; Buy it for palmers and I won't sell it to you! In this way, three times today, four times in the Ming Dynasty, two small baked wheat cakes can't be sold, and they are all hairy standing there. One day, the dutiful son passed by and wanted to buy sesame cakes. He asked, "Boss, how much are the biscuits? "? " "The big one costs three dollars, and the small one costs five dollars."

"I bought two expensive ones for my mother." The two immortals knew that the dutiful son had arrived.

There is an elixir in those two biscuits. If you keep giving it to his mother, you will become immortal standing there. Just say, "Your mother is old, just bring one. Eat by yourself and buy three yuan each. "

The dutiful son thought about it, but I didn't eat it either, so I bought an expensive one and gave it to my mother. He paid five yuan, picked up the baked wheat cake and put it in his arms. This is a terrible thing. The sesame seed cake in the cotton-padded jacket is too hot, and my chest is burning, as if it were going to be cooked.

Where is this miracle? I saw the boss holding a poker and a biscuit in the stove.