The method of reproduction and planting of Pinus bungeana

White Pine, Pinus bungeana Zucc.
It is a pine tree of the genus Pinaceae, which can reach heights of 30 meters and diameters of 2 meters. Positive species, young trees resistant to half shade; cold resistance is not as good as the pine, but drought tolerance, moisture and adaptability to the soil than the strong pine. It can adapt to -30°C dry cold climate and soil with a pH value of 7.5 to 8; it can grow in limestone areas, but cannot grow in poor drainage or water accumulation areas, and has strong resistance to sulfur dioxide and dust pollution. . Deep rooting, long life. The young shoots are naturally distributed and densely distributed, so it is not necessary to trim and shape the beautiful canopy. It grows more slowly, with an annual seedling height of only 3 cm to 5 cm, and up to 1 m after 10 years.

Breeding methods and planting points Pinus bungeana is generally used for sowing and breeding. The nursery should select well-drained sandy soils with flat topography and deep sandy soil. Seeding immediately after thawing in early spring can reduce pine blight. Because of the fear of warts, high-bed sowing should be used. Before sowing, sufficient water should be poured. About 1 kg of seeds per 10 square meters can be used to produce 1000 to 2000 seedlings. Spread 1 to 1.5 centimeters of cover soil after spreading and cover with plastic film to increase germination rate. After the seedlings are drawn, gradually increase the ventilation time and even remove the film. After sowing, the seedlings are unearthed in shells and fall off on their own for about 20 days. This time should prevent bird damage. Seedlings should be shaded during the seedling period to prevent sunburn. Before entering the winter, they should be buried to prevent cold. Seedling root length, sparse lateral roots, so when transplanting should be less lateral root injury, or easy to die.
If twigs are grafted and propagated, white twigs should be grafted onto older rootstocks of Pinus tabulaeformis. The Pinus sylvestris twigs grafted onto the rootstocks of 3-year to 4-year-old Pinus tabulaeformis, generally have a survival rate of 85% to 95%, and have strong affinity and fast growth. Scion should be selected for growth and robust shoots, with a thickness of 0.5 cm.
When transplanting seedling roots of two-year-old seedlings, they should protect the root system and avoid root dry injury. They should be planted along with the digging, and they should be planted once every few years to promote fibrous roots and facilitate the colonization and survival. In general greening, large seedlings of more than 10 years old are used. It is best to transplant in early winter and in early spring to freeze. When large seedlings are used, they must be transplanted with soil balls. Big seedlings with a diameter of 12 cm or less must be planted. A ball with a height of 120 cm and a diameter of 150 cm must be excavated. In the process of handling, soil balls should be prevented from being broken, and the piles should be tied and fixed after planting.
White pine has a wide range of uses in the garden configuration. It can be planted alone, planted, or planted in forests or street trees, all of which can achieve good results. It is suitable for gardens.

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