1, characteristics Torreya grandis is a tall, deciduous tree, which is a unique species of fast-growing timber in China. The height of the tree is up to 25m and the diameter at breast height is 70cm. The bark is brownish to grayish brown and irregularly strips longitudinally and flake off. Leaves alternate, pinnate, 25-50cm long, scented; leaflets opposite, 10-22. Flowers bisexual, terminal cone-shaped inflorescences, flowers white aromatic, flowering in June. The fruit ripening period is October. Citron propagation is easy. Under sunny conditions, the roots close to the ground are likely to grow into new plants; they are more resistant to water and moisture, and they are mostly distributed in valleys, houses, and alluvial soils where the moisture content is good, but in low-lying water areas and saline soils. Heavy (above PH 8.5) or particularly dry and inhospitable mountains and sandy lands; poorly fertile sandy soils require less stringent soil acidity and alkalinity. They grow well on brown earths in calcareous mountains, with deep soil layers. Fertile, moist, loosely ventilated, well-drained neutral alluvial sandy loam grows fastest with an annual DBH growth of more than 2 cm. 2, cultivation points (1) Seed production and nursery The seeds are generally harvested from August to September. After the seeds are dried, they should be stored in a ventilated and dry room. The seed has a short life span and loses germination for more than 1 year after storage. Seeds weighing 13 grams, germination rate of 50% -60%. Sow seedlings: Seeds soaked with warm water for 15-20 hours before sowing, and then soaked with clear water for 10 hours, remove the germination, temperature control at 20-25 °C, seed cracking, you can sow. Generally in the 2-3 month ditch drilling, row spacing 25cm, sowing rate of 2.5-4kg per mu. After the seedlings have been unearthed, weeding and weed removal are required. Seedling height 5-6cm begin seedlings, 1Ocm or so Dingmiao, plant spacing 15-20cm. Seedlings are dominated by weeding, combined with loose soil, thinning, and a small amount of nitrogenous fertilizers to promote seedlings. From July to August, nitrogen fertilizers are mainly used, and appropriate phosphorus and potassium fertilizers are used. Vegetative propagation: Toona sinensis is strong in root and can be used as a method of burying roots and keeping roots. The method of burying the root and raising seedlings is simple, the survival rate is high, the seedlings are easy to manage, the quality is good, and the cost is low. Roots of 1-2 years old seedlings are collected, and lateral roots on robust trees are also available. The root strips were collected during the spring 2-3 months and cut in time after harvest. 15-20cm in length, with picking and breeding as well. Fertile 30-45 thousand plants per hectare. For the seedlings to grow neatly, roots should be graded and nursed according to their thickness. In order to prevent root rot of healing tissue, we should pay attention to maintaining the temperature so as to facilitate the unearthed soil. Generally, watering can be avoided. If drought occurs, watering between rows can be used. After watering or raining, the soil should be soiled in time. When the seedling height is 10cm, it is necessary to promptly go to the weak shoots and leave one strong bud. (2) Afforestation technology Afforestation sites should be selected on sunny slopes, deep soils, fertile, wet afforestation grounds, planting basal fertilizers under digging, planting depths up to 3cm above the root neck, and 1800-2250 plants per hectare should be suitable. It can be planted on the alluvial valleys beside the village, on the roadside, behind the houses, and in the lower part of the hillside. After the afforestation, measures such as weeding, loosening, topdressing, irrigation, and degermination shall be carried out in time. Toona sinensis has more damage to leaf insects, especially in the spring and summer. 3, the development value The nutritional value of Toona sinensis is high. Axillary bud is a kind of woody vegetable with high vitamin and carotene content. It has high economic value and medicinal value. Its wood is deep reddish purple, and its texture is hard and delicate. Luster, strong and durable, as a good material for furniture, at the same time, construction, shipbuilding and other materials, known as "China's mahogany." Citron is also a kind of ornamental tree. The autumn leaves are red, so it is called "red clam." The seed oil content is 38.5%, which is an excellent woody edible oil. 4, the range of fitness Citrons adapt to the range of plants, vertical distribution of the highest altitude up to 1600-1800m, but mostly in mountainous and plain areas below 1500m above sea level. In Fuzhou, Fucheng, Fu'an, Luoyuan, Minhou, and Luanqing are many, but many are scattered and there are few films. In recent years, Fucheng, Fu'an, Minhou, Luoyuan and other places have a large area of ​​artificial afforestation. KDC-Y series is suitable for gynecological diagnosis and examination,child-birth,caesarean operation and other gynecological surgical operations.Operating Table For Delivery.
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