Platycladus orientalis also known as cedar, cypress, cypress. Platycladus orientalis is a major afforestation species in China and has a long history of cultivation. Platycladus orientalis is an afforestation species of barren hills, resistant to drought and barren. Platycladus orientalis is widely distributed in China. It has been cultivated all over the country as far as Tibet Deqing and Daxie, and the Yellow River and the Tanhe River basins have been concentrated. Temperate tree species can adapt to dry, cool and warm climates. They grow normally under the weather conditions of annual rainfall of 300 to 1600mm and annual average temperature of 8 to 16°C, and can withstand an absolute low temperature of 35°C. Strict requirements on the soil, can grow in sunny and thin slopes and stone seams. The bedrock and soil-forming parent materials are highly adaptable, and can be reforested in sites such as limestone, purple shale, and granite. It has a wide range of adaptation to soil pH and is suitable for use in neutral soils. It also thrives in slightly acidic and slightly alkaline soils. Strong saline-alkaline resistance, good growth in soil with 0.2% salt content. However, it is faster to grow on deep, fertile, well-drained soils. Platycladus orientalis is weak and the groundwater level is too high or poor drainage. Platycladus orientalis is a light tree species, but seedlings and saplings are resistant to shading. Natural regeneration is better on woodlands with a canopy density of 0.8 or more. Saplings grow well under the canopy of tree species such as Pinus tabulaeformis, Robinia pseudoacacia, and Ma et al. However, after 20 years of life, the amount of light needs to be increased, and the forest canopy density should be maintained at 0.7 to 0.8. The sprouts are strong and the branches can sprout new branches after being damaged. Shallow-rooted, lateral roots, fibrous roots developed, weak wind resistance. Platycladus orientalis begins to mature in 5-6 years, but seed collection should be carried out on a strong mother tree from 20 to 30 years old. After the mature conifers were collected from September to October, they were air-dried and the seed scales were cracked and the seeds were removed. After the wind or water election, open Tibet. The seedling rate is about 10%, the germination rate is 70% to 85%, 45,000 grains per kilogram, and the grain weight is 22g. At room temperature, storage of seeds with cloth bags can maintain high germination rates within 2 to 3 years. Platycladus orientalis is generally used for live seedlings. Before sowing, soak it in warm water at 30-40°C for 12 hours, remove and place it in a bale or basket, place it on a leeward place, wash it once with water every day, and often tip over, when the seeds are half open , you can sow. Using ridge sowing and bed sowing, the sowing amount per hectare is about 150kg. During ridge sowing, the ridge width is 70cm wide, the ridge width is 30-35cm, the ridge height is 21-15cm, and the ridge distance is 70cm. The ridge surface can be double-lined or single-row drilled. The double row broadcasts 5 to 7cm and the single row broadcasts 10 to 12cm. Bed sowing, bed length l0m, bed width lm, can be 3 rows along the broadcast, broadcast amplitude 5 ~ 10cm. Earthing 2cm after sowing. In arid areas, it can be cultivated after sowing. After Platycladus orientalis sowing, the seed layer is protected from soil moisture, and the water supply is appropriately controlled to prevent bird and animal damage. During the emergence of the seedlings, the water should be irrigated regularly, and the growing season should be irrigated every 10 to 15 days according to the soil moisture condition. It is advisable to use side irrigation or sprinkler irrigation. The fast-growing seedlings are combined with irrigation for topdressing. 150 kg of ammonium sulfate per hectare is applied twice. The first time in the fast-growing period of the seedlings and the second time in the second half; or the human waste is administered. Seedlings about 5cm high seedling time, about 100 per meter sowing ditch reserved, winter should be filled before soil freezing, winter cold and windy areas, should be buried in cold, in order to seedlings overwinter. Generally 1 year old seedling height 15 ~ 25cm, ground diameter 0.25cm, used for afforestation in the spring and autumn; a year and a half seedling height 25 ~ 30cm, ground diameter 0.4cm or more for afforestation in the rainy season. The cultivation of large seedlings requires transplantation, and the density of transplants depends on the cultivation period. After transplanting for 1 year, the spacing of the plants is 10-20cm; 2 years of cultivation, 20-40cm; 3 years of cultivation, 30-40cm. Generally two and a half years of transplanted seedlings are 50 to 70 cm in height and 0.6 to 1.5 cm in diameter. Platycladus orientalis is usually planted by afforestation. Low-mountain or mid-1000m above sea level, sunny slopes and semi-sunny slopes, dry, inhospitable areas of rocky mountains, light saline-alkali lands and sandy lands, can all be used for afforestation. Low wetlands should not be planted. Most of the arborvitae afforestation is in a thin and dry place. Therefore, it is necessary to increase the specifications for soil preparation and create conditions for the rapid growth of forest trees. The use of fish scale pits, narrow terraces, horizontal terraces, and horizontal trenches are generally used for soil preparation. Spring, autumn and rain can be planted in three seasons, depending on soil moisture conditions. Platycladus orientalis is easy to survive in the rainy season. The specific approach is to use half a year and two and a half year old seedlings for planting, with the seedlings, with afforestation, and planted on the same day. Attention should be paid to weather forecast and weather changes. If it is clear that there is no rain, construction shall be stopped and reforestation shall be carried out when rainy days continue. Autumn afforestation occurs when rain conditions are good in the fall or soil moisture is good. One-year-old strong seedlings are planted in two clusters. Pay attention to proper deep planting and burying. In order to prevent winter wind damage and frost damage, it is necessary to cover soil to prevent cold. After planting, the tip of the seedling will be bent to the southeast and the upper part will be covered with a mound of 10 to 15 cm in height. With the principle of not using seedlings, shoots will be made. In the second year, the needles will begin to turn green and the soil will be preserved. Density, in mixed forests, grows stronger and faster than pure forests under certain lateral shade conditions. After Platycladus orientalis is planted, tending management is required. Platycladus orientalis seedling root more. It is easy to survive, and it is also best to weed the soil three times a year in order to promote rapid growth within 3 to 4 years after afforestation. The first time was in late April, the second time in July, and the third time in early October. The depth of loose soil in arid areas should be deeper, but care should be taken to prevent damage to the seedling root system. Platycladus proliferates lateral branches, and after 5 years of afforestation, pruning is carried out in autumn or early spring, and 1/3 of the total amount is repaired, so that it does not collapse. After 2 to 3 years, pruning once. Oriental arborvitae wood is rich in oil, shiny, scented, with a slanting texture and fine structure. Slow drying, stable after drying, strong corrosion resistance, easy cutting, smooth cut surface; good paint and adhesive properties. Wood for construction, shipbuilding, bridges, furniture, sculpture, joinery, stationery, etc. Seeds, roots, branches, leaves, bark, etc. can be used medicinally. Seeds (Bozi kernel) can nourish and strengthen, nourish the mind and calm the body, relax laxative, and stop sweating; branches and leaves can stop bleeding, cooling blood, diuresis, and detoxification. . The oil content of seeds is about 22%, and oil can be pressed to make soap and food. It is also widely used in the pharmaceutical and perfumery industries. It has a beautiful tree shape and is resistant to pruning. It is often used as a landscaping and hedgerow species.
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