Expository essay about pine trees, introduction to pine trees introduction about pine trees

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The most prestigious pine tree.

1) The pine tree symbolizes perseverance and tenacity, and shows the spirit of high wind and bright festivals. People sang about it, praised her, and even suggested that it be elected as a national tree.

However, there is more to it than one. There are more than 80 species in the world, and there are about 20 species in China, and in this huge family, the most famous is the masson pine.

2) Masson pine is the most widely distributed, which is unmatched by any pine. It is from Henan and the south of Shandong in the north to Liangguang in the south.

Taiwan, from the coast in the east to central Sichuan and Guizhou in the west, almost half of China has its traces everywhere.

3) Masson pine is very adaptable to the environment. It is particularly drought-tolerant, whether it is on extremely barren red soil, gravel soil or sandy soil, or in the middle of steep mountain rocks, the Masson pine can stubbornly take root, absorb the water from the depths, stand proudly, and the young saplings grow into pillars. However, the masson pine industry, like other creatures, is a hobby of his own.

4) The growth rate of Masson pine is relatively fast, generally 20-year-old trees, up to 10-15 meters high, DBH about 14 cm. It can reach about 18-25 cm for 30-year-olds, and about 25-29 cm for 40-year-olds, with a DBH of about 35 cm. Generally speaking, after the age of 30, it does not grow to a higher place, but to grow thicker.

Masson pine also has a long lifespan, up to about 300 years old. Pinus massoniana relies on seeds for propagation, and has a high survival rate regardless of artificial seedling propagation or natural seed propagation. Usually, between October and December is the best time to harvest seeds.

At this time, the fruit bulbs of the masson pine are turning from turquoise green to chestnut brown. The harvested seeds are sown in the seedbeds in the early spring of the following year, and the seedlings are ready for reforestation in the spring of the following year. The seeds of the masson pine have wings, and when the wind blows, they will fall on the surrounding land, which is called flying into the forest.

If you consciously keep some of the mother plants when cutting trees, many years later, a lush Masson pine forest will appear. It is no wonder that foresters are so fond of Masson pine and hail it as a "pioneer tree species in barren mountain afforestation".

5) Masson pine also has a high economic value. His wood is very resistant to rot because it is rich in pine resin, and is a good material for construction and furniture, as well as an excellent raw material for papermaking. Pine resin can be used to extract rosin and turpentine.

It is an important industrial raw material. Even the little pine needles.

The leaf is not small, it can be used to extract pine needle oil, used in chemical, food, pharmaceutical and other industries. Its stumps and roots can also be used to cultivate mushrooms and the precious Chinese medicine Poria cocos.

6) At the same time, the masson pine has a majestic physique and a quirky posture.

There are "such as obstacles, such as screens, such as embroidery, like buildings, like covers, like flags."

image. It is suitable for planting in courtyards, roadsides, valleys, pools, and waterfronts. Therefore, Masson pine is also an important tree species for gardening and greening in central and southern China.

1. Pinus, (scientific name: pinus): is a pine family, pine genus.

Plant. There are more than 80 species of pine trees in the world, and pine trees are mainly divided into masson pine, tabuliformis pine, whitebark pine, and podocarpus.

Huashan pine, Dabie Mountain five-needle pine, Korean pine, red pine, black pine, Huangshan pine, Yunnan pine, money pine, sylvestris pine, cedar, etc.

2. For example, Pinus tabuliformis, Pinus sylvestris, Pinus sylvestris sylvestris and Pinus sylvestris sylvestris in North China and Northwest Provinces, Masson pine, Huangshan pine and alpine pine in Central China, Bashan pine in Qinba Mountains, and Taiwan pine.

and North American breviphylla pine, most of which are the main tree species in barren mountain afforestation in China.

3. The pine tree is a wheel-shaped branch, with long internodes, relatively thin and straight branches or slightly bent downward, and slender needles in bunches. Its canopy looks fluffy and not compact, and the word "pine" is a visual description of its canopy characteristics. Therefore, "pine" is a type of tree with a fluffy crown.

Pine trees are sturdy and have a very long lifespan.

Tall pines, verdant pines, lush pines, standing pines, strong pines, verdant pines, vigorous pines, tall pines, verdant pines, lush pines, towering pines.

1. Pine trees are lush and vibrant all year round. In winter, the flowers and plants have withered and there is no greenery, but the pine trees are still green and tall. In the cold winter, the snow is heavy, and the branches of the pine trees are covered with snowflakes, like a white quilt.

It's really a different scenery of the northern country, and we get the enjoyment of beauty.

2. The pine trees, the brown trunks, are thick enough to have a bowl mouth, straight and straight, and the pine leaves of the trees are lovely green, like an open green velvet umbrella, blowing in the wind, swaying gently.

3. The trunk of the pine tree is brown with a crown.

It's like a small tower. Its leaves are thin and pointy, and the bunches spread out like needles, and although it does not bloom beautiful flowers, it is evergreen all year round, which is more memorable.

4. Pine trees that do not have spring.

The peach trees are not as beautiful as the plane trees in summer, and there are no ginkgo trees in autumn.

A golden coat. It's just a pine tree in a plain green coat in winter.

5. Pine trees, without the fragrance of flowers; pine, without the slender stature of birch; The pine tree, it does not have the fragrant and sweet fruit of the fruit tree. But in the crevices of the cliffs, it is difficult for other trees to take root and settle down, but it can stand proudly; In the middle of winter when the north wind is howling, the northern country of the frozen earth is withered by flowers and withered, but it is still vibrant.

The pine of the pine: horizontal, vertical, apostrophe, point, apostrophe, apostrophe, apostrophe, point. 松, the Chinese character for Changpi Dry Bucket (first-class character), pronounced as sōng, was first seen in oracle bone inscriptions.

The original meaning is the name of the tree, pine; It is also borrowed as loose and loose, and when it is used as an adjective, it is used as "loose (traditional)", which means that the hair is very messy.

Loose, shape and sound words. In oracle bone inscriptions, the left side of the word "pine" is "gong", which indicates the pronunciation of the character; On the right is "wood", which means the meaning of the word. In the small seal inscription, the left and right positions of "gong" and "wood" are reversed, but the meaning of the word remains unchanged.

The original meaning is the name of the tree, pine; "Saying": "Pine, wood also."

Poetry, Zheng Feng, Mountain Fusu": "The mountain has Qiao Song, and Xi has a swimming dragon." ”

and "Xiaoya Tianbao": "Like the pine and cypress, there is no failure or inheritance." "It is also borrowed as loose and loose. "Vocabulary Supplement: Wood": "Pine, the same as pine." The word "loose" is used as an adjective, and the word "loose" refers to the messy hair.

Tang Yun is detailed and tangible. "Gathering Rhymes" is thoughtful. "Positive Rhyme" is cut in the middle.

The sound is defeated. Wood also. "Words Say":

Pine, the length of a hundred trees, Judah Gong, so the word from Gong. "Rites and Rituals": If the pine and cypress have a heart, they will not change Ke Yiye at four o'clock.

Historical Records: The Legend of the Turtle: The pine of a thousand years old, with rabbit silk on it and Poria cocos on it. "Legacy":

Mrs. Wu Deng hurt her face and used amber crumbs to eliminate the marks. Note: Amber and pine resin have been transformed into the ground for thousands of years.

1. Pine is also known as evergreen tree, belongs to the pine family, mostly distributed in the northeast of China to Heilongjiang, pine tree introduction said that the life of pine is very long, the oldest pine tree has survived for 6000 years. The crown of the pine tree is pyramid-shaped, and its leaves are mostly lanceolate, evergreen in all seasons, and have a certain ornamental value.

2. The pine tree is a monoecious plant, it can bear fruit in the second year of growth, some of its fruits are long ovate, some are cylindrical, and the scales of the pine tree will open soon after the fruit is ripe. Pine trees have a certain cold tolerance and can grow in the open air in the northern regions in winter, but some varieties of pine belong to tropical species.

3. Most pine trees are light-loving plants, and they have a high demand for light during their growth, so it is best to place the plants in a ventilated and well-lit environment when planting pine trees. Pine trees are not very soil-demanding and can grow in a wide variety of soils, but they are best suited to grow in fertile, acidic soils.

4. Pine trees have a strong ability to resist drought, the demand for water is not high, and the plant can be watered according to the principle of not drying and watering, watering is watered thoroughly, but try not to leave stagnant water every time you water. Rosin and turpentine can be extracted from the trunk of the pine tree, and its seeds are rich in protein and oil, making them edible.

The Chinese regard the pine tree as a symbol of steadfastness, chastity and longevity. Pine, bamboo, and plum are known as the "three friends of the cold year", which is a tenacious spirit that is not afraid of adversity and overcoming difficulties.

The pine tree is a very tall and straight tree, when the pine tree is not yet lush in the seedling period, it gradually grows out of the branches and leaves as a whole in a triangular shape, its leaves are arranged around the branches in a rotating upward way, the shape is like a neat line as slender, the edge of the leaf also has a little bit of a small serration, just like its cute little teeth, it is such a unique and beautiful leaf generally grows for one to three years before it is formed.

Pine trees are planted on a large scale in all regions of our country, it can be suitable for a variety of different environmental conditions, and it is very resistant to cold, and then it is still full of vitality in winter, pine is divided into many varieties, but no matter which variety, it has its own unique inner spirit, each of which is loved by people, and its trunk can change with the characteristics of the environment, some are upright, some are curved, are in order to set off the environment, It highlights a kind of refined and elegant quality.

There are many, many things in life. Among them, the one that inspired me was the lush pine tree. On the rolling green hills, many pine trees stand like soldiers guarding their homes.

Although pine trees are not as gorgeous and fragrant as flowers, they can withstand the wind, frost, rain and snow more than flowers.

In spring, the slight spring breeze caresses the pine tree, and the misty drizzle feeds the pine tree, and it grows tender green new leaves under the care of the spring girl. The leaves of the pine tree are like needles, desperately stretching outward, hoping to grow into a large tree with lush foliage as soon as possible.

Summer is here, the sun is blazing, and the heat is unbearable. The little flowers and grass all drooped their heads, but only the pine trees were still not afraid of the scorching heat, and stood straight there in the hall. It opened a huge green umbrella for people, and people came to cool off under the trees.

The pine tree was also very helpful, without complaining about hunger and rent, and playing one beautiful song after another for the people, rustling, rustling, rustling......

In the autumn of September, the flowers have withered, the grass has withered, and the leaves of many trees have fallenFinish. Not only did the pine tree not wither, but it also stretched its branches and leaves in the autumn rain, and it was verdant and verdant, not lagging behind other trees.

The bitter cold of winter arrived, and hail, rain and snow fell on the earth, and the bitter cold wind roared. The whole world seems to be frozen, people are staying at home, flowers and grass have long since disappeared, and trees are standing bare on the mountainside. But in the midst of all this bleak cold, there is also a beautiful landscape, and that is the pine trees, which are still as verdant as spring.

It conquered the storm again and again with its steely perseverance and tenacious vitality. With a smile of victory, he stood on the mountains in the face of the wind and snow, waiting for the day when spring returned to the earth.

I was struck by the indomitable perseverance of the pine tree. It doesn't matter if it's a hot summer or a cold winter, the pine trees still stand. It has the quality of selfless dedication, strength and integrity, and this inner beauty is much more noble than the outer beauty of the flowers in the greenhouse.

People are the same as trees, in the face of difficulties, do not give in, bravely overcome difficulties, but also have the quality of silent dedication and no return like pine trees.