Pagoda pine

Pagoda pine

This entry is compiled and applied by "popular science China" Science Encyclopedia

to examine

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Pagoda pine is an evergreen tree with a height of more than 70 meters. Its branches are flat, its layers are obvious, and its crown is pagoda shaped. Pagoda pine is a common cedar. It is native to the Himalayas and can be planted from Liaodong Peninsula to the Yangtze River Valley in China. Pinus Baota is a positive plant with strong cold resistance and light preference. Baota pine is very beautiful. Cedars are sensitive to sulfur dioxide and hydrogen fluoride.

morphological character

Pinus Baota is an evergreen tree with a height of 50m. The crown of the tree is conical, and the height under the branch is low. The bark is grayish brown, scaly and dehiscent. Branchlets irregularly whorled, spreading; branchlets pendulous. Leaves needle shaped, hard, clustered on short branches, scattered on long branches. They are mostly dioecious and rarely monoecious. The flowering period is from October to November. The cones are erect, ellipsoid to ovate, 7-12cm long and 5-9cm in diameter. They mature in September to October next year

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Distribution range

Native to the Himalayas, it can be planted from Liaodong Peninsula to the Yangtze River Basin in China

. Such as China's Nanjing, Xi'an, Hunan, Guizhou and other places have a large number of introduction and cultivation.

Ecological habits

Pinus Baota is a positive plant with strong cold resistance, light preference and shade tolerance. It is more resistant to drought and barren. It can grow in slightly acidic and alkaline soil. It is most suitable for growing in deep, fertile and loose soil. It can also adapt to sticky loess and barren arid land, and avoid waterlogging. Young leaves are sensitive to sulfur dioxide, which often leads to wilting

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Main value

Pagoda pine is one of the most important landscape trees in the world with beautiful shape and evergreen all year round. It is most suitable to be planted in the center of lawn, the center of building vestibule, the center of square, the two sides of main buildings and the entrance of garden gate. In addition, they are planted on both sides of the garden road to form a corridor, which is also very spectacular

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Cedars are very sensitive to sulfur dioxide and hydrogen fluoride. If the surrounding air gets worse, cedars' needles will turn from green to yellow, arch to wither and fall. So we can do air testing

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Methods of reproduction

There are two main ways to raise seedlings: sowing and cutting.

1. Selection of nursery land

Therefore, the sandy soil with flat terrain, convenient irrigation and drainage, fertile soil, few diseases and pests and weeds, and good permeability should be selected as nursery land. For the nursery with heavy soil viscosity, the plot with good soil aggregate structure and loose soil should be selected as the nursery ground.

2. Land preparation and bed making

The nursery ground should be deep ploughed in the winter of the previous year to make the soil fully mature. Soil preparation should be completed in winter and early spring before sowing. 150 kg cake fertilizer, 50 kg compound fertilizer of N, P and K, 7.5 kg carbofuran and 12 kg ferrous sulfate should be applied to each mu of land during harrowing. In December of the previous year, the first ploughing harrow should be completed, and the ploughing depth should reach 20-25 cm. Deep ploughing in winter can freeze the soil and kill the underground pests and their eggs, so as to reduce the pests. In February of the next year, the second ploughing harrow was carried out. In this ploughing harrow, 1 / 2 fertilizer and 1 / 2 medicament were used respectively, and the ploughing depth was 20-25 cm. In the middle of March, the third ploughing harrow was carried out, and the remaining fertilizer and chemicals were sprinkled in, and the ploughing depth was the same as that of the previous ploughing harrow. After three times of ploughing and harrowing, not only the soil is fine and the nursery is flat, but also the fertilizer and pesticide can be fully mixed with the soil, so as to ensure the uniform distribution of soil nutrients and thorough disinfection. The bed should be 1.0-1.2m wide, 25-30cm high and 35-40cm wide. The seedbed should be east-west and the soil should be harrowed and broken.

3. Seed treatment

The seeds should be disinfected before sowing to prevent and control diseases and pests. Seeds are usually soaked in potassium permanganate solution or Bordeaux solution for 5 minutes. After soaking the seeds, wash them with clean water, then soak them in warm water at about 500C, let them cool naturally to room temperature, and then take out the seeds to dry after 10-15 hours. In order to accelerate seed germination, the soaked seeds can be buried in wet sand. The method is to mix the seeds into the clean wet sand, and after 3-5 days, the seeds can be sown when the radicle is exposed from the top of the seeds.

4. Sowing

It is suggested that the seedlings of Cedrus deodara should be raised before and after the "vernal equinox", and the sowing method should be row on demand, with row spacing of 10-15 cm and plant spacing of 4-5 cm. When sowing, first press out a 1.5-2.0 cm deep sowing ditch with a 1.0-1.5 cm wide board, and then insert the seed tip downward evenly into the soil. After the row is sown, cover the seeds with the soil on both sides of the sowing ditch. The thickness of the covering soil is 1.0-1.5cm, and 1-3kg seeds are sown per mu. After sowing and covering the soil, water the seedbed with a watering can until the seedbed is drenched; then cover it with 1 cm thick fresh sawdust or straw, and then wet the sawdust or straw with water, so as to achieve the effect of heat preservation and moisture retention. After that, the seeds should be watered in time according to the dry weather to ensure the normal germination of the seeds. If there are few seeds, the nutrition bag (nutrition Cup) can also be used to raise seedlings.

5. Seedling management

Before the emergence of seedlings, keep the soil of seedbed moist and avoid drying, so as not to affect the emergence of seedlings due to the hardening of topsoil. The duration of Cedrus deodara seedlings is as long as one month. During this period, the seedlings with difficulty in shelling should be assisted in shelling, and the plants with difficulty in arching soil should use bamboo sticks to peel off the soil, so as to ensure the normal emergence of seedlings. After the seedlings are unearthed, the mulch should be removed gradually. When more than 80% of the seeds are unearthed, they should be put up in time and covered with sunshade net or reed curtain. In the process of normal growth, soil loosening, weeding and top dressing should be carried out in a timely manner. The depth of soil loosening should be appropriate to avoid root damage. Weeding should be done early, small and long. Top dressing should be done with rotten human manure or cake fertilizer water. The concentration should be low at the beginning and gradually increased later. Generally, apply fully retted thin cake fertilizer, such as chemical fertilizer, 3-5 kg per mu is appropriate, sprinkle on the bed surface immediately after watering, must be poured thoroughly, otherwise there will be burning phenomenon. After entering October, in order to prevent excessive growth, water and fertilizer should be strictly controlled, and straw or pine needles should be covered on the seedbed to prevent the seedlings from freezing in winter. For the seedlings transplanted in the next spring, we should do a good job in clearing ditches and cultivating soil

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Susceptible to diseases and insect pests

The common diseases are gray mold, and the common pests are scale insects

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Address: shizifengyao, east of shilinjingshe, Huangshan scenic spot, Tangkou Town, Huangshan District, Huangshan City.

Longitude: 118.16928827987

Latitude: 30.143393259976

Tel: Huangshan Scenic Area Tel: 0559-5561111

Ticket information: no ticket required. It is included in the ticket of Huangshan scenic area

Chinese PinYin : Bao Ta Song