Toon toon toon tree seedlings for 
 Toon native to China, distributed in extensive areas north and south of the Yangtze River, the Meliaceae, deciduous trees, dioecious, was even pinnate leaves, panicles, hermaphrodite flowers white, fruit is oval-shaped capsule, winged seeds, seed can reproduce. Tall tree, in addition to Chunya to food, gardening is the preferred species. Chunya nutrient-rich and has a therapeutic role, attending exogenous cold, Fengshibitong, stomach pain, dysentery. 
 Second, the morphological characteristics 
 Toon toon tree is a perennial deciduous tree, trees, up to 10 meters. Leaves alternate, is even pinnate, leaflets 6-10 pairs, leaf scars large, length 40 cm, 24 cm wide, leaflets oblong, Ye Duanrui tip, 10-12 cm long, 4 cm wide, purple leaves adult leaves green, dorsal red-brown, light Phi waxy, slightly astringent, petioles red. Panicles terminal, drooping, bisexual flowers, white, fragrant flowers small, bell-shaped, ovary conical, 5 rooms, each room has three ovules, style shorter than ovary, moon fruit, narrowly elliptic or nearly oval, about 2 cm long, reddish brown mature, fruit leather quality, cracking into a bell-shaped. June 10-November flowering fruit ripening. Seeds oval, on a long wooden wings, kind of grain is small, low germination rate, high oil content and oil consumption. 
 Toon thermophilic, suitable for the average temperature 8-10 ℃ in the areas of cultivation, cold with the increase of seedling age increased. With the seeding year seedlings about 10 ℃ in a possible cold. Toon happy light, more humidity, suitable for growing in the river, around the house in rich moist soil, sandy loam is generally good. Suitable soil pH for the pH5.5-8.0. 
 Many of sinensis varieties, according to early sprouting bud and cotyledon Toon different colors, purple basically be divided into two major categories of Toona sinensis and green. There is a dark purple oil toon toon, marked Chun, Jiaozuo red cedar, western Muzi Chun and other varieties; There is a green oil green toon toon, yellow umbrellas, and other varieties of Romania. Toon different varieties, their characteristics and properties are also different. Purple Toon generally are more open canopy, bark greyish brown, purple-brown spores, the beginning of a bud purple, shiny, flavor, less fiber, containing more fat; green cedar, upright crown, bark green or greenish brown, smell a little short, greasy and less. 
 Third, the cultivation techniques 
 (1) Cultivation 
 ① general cultivation. Toon planting seedlings and breeding sub-division propagation (also called root suckers) two. 
 Seed propagation of the low rate of seed germination of Toona sinensis, so before planting, to seeds in warm water 30-35 ℃ for 24 hours after picked up, placed in germination at 25 ℃. Radicle exposed to sow grain size (the minimum ground temperature at planting time in about 5 ℃) in general in Shanghai in mid-March on. After emergence seedlings ,2-3 ,4-5 true leaves time when Dingmiao true leaves, with space for the 25x15 cm. 
 Division propagation, adult plant roots can dig seedlings in early spring, plant the seedlings on the ground, when the seedlings the following year to 2 meters long, re-colonization. Tiller root pruning method can be applied in Dongmochunchu, dug in around the tree into 60 cm deep circular ditch, cut off part of the lateral roots, and will be filled ditch, the toon prone to adventitious roots, so root pruning tip germination Xinmiao, sub- years can be transplanted. 
 Toon bred seedlings after germination in early spring before planting. Large tracts of forest to create a toon, with space 7x 5 meters. Planting in the canals, after house, all for a single row, spacing about 5 meters. To be watered 2-3 times after planting in order to improve the survival rate. 
 ② dwarf close planting. This is a cultivation method developed in recent years. It's the same breeding method and ordinary Caipei, but in terms of planting density and tree pruning are different. Usually planted for each 6000 is about 666.7 square meters. Tree can be divided into two kinds of multi-type and cluster-type: multi-layer type is removed when the top 2 meters height shoot to promote lateral bud germination, formation of layer 3 backbone branch, the first 70 cm from the ground layer 1, layer 2 from the 60 cm Layer 1, Layer 3 Layer 2 40 cm distance. This type of multi-trunk high full lignification, yield more stable. Bunch type is about 1 m height to the top when the shoot, leaving the new branching not only the terminal bud leaves collected, to be 20-30 cm long when the front of his branch head. Characterized by the lower trunk, main branch more. 
 ③ protected cultivation. Can also be divided into two types: one is planted in the greenhouse (or pipe roof) and close planting dwarf cedar, to 11 mid (referring to North South) to buckle film. The other is to sleep in two or three years have passed temporary planting seedlings in the greenhouse (or pipe roof) above. Room (shed) during the day to keep the temperature 18-24 ℃, night temperatures not lower than 12 ℃, after 40-45 days, you can feed leaves. 
 (2) management 
 Toon of the field management corporations are extensive, but in order to fast growth, high yield, but also pay attention to fertilizer and pest control work. If dry weather, watering should be timely; annually Row crop cultivators, the line between the best green manure, May be buried or turning over between human and animal feces and urine pouring facilities. 
 There are Toon pest caterpillars, clouds spotted beetles, scale insects, etc. Drosicha, available fenitrothion and other pesticides to control bacteria; diseases are leaf rust, powdery mildew, etc., can be used Bordeaux mixture, lime sulfur and other chemical control. 
 (3) picking 
 General cultivation and high density cultivation of dwarf cedar, usually before germination during the Ching Ming, Guyu before and after the terminal bud can be harvested, this first - second pick, and said the first crop of Chunya, not only fat and tender, and rich flavor, high quality; later According to the growth, every 15-20 days, picking the second time. Newly planted cedar, closing up 2 times, 3 years 2-3 times annual income, yield also increased. As for the protected cultivation, and by heating in winter can also be picked, if not heated, and can be supplied in advance bud in early spring. 
 Fourth, nutrition and food 
 Toon head with the line very rich in nutrition. According to analysis, each 100 grams of TS header, containing 9.8 g protein, 143 mg of calcium, Vitamin C115 mg, are listed on the vegetables to the forefront. In addition, phosphorus 135 mg, 1.36 mg, carotene, and iron and B vitamins and other nutrients. 
 Five, Planting Toon 
 Planting in the toon, we should grasp the following science and technology management. 
 First, adjust the temperature, humidity and light. 1, the temperature regulation. It has been observed, Peng Wen at 25 ℃, 24-hour shoots can be 3-4 cm long; and 15 ℃ cases, only 1 cm long; Pengwen exceed 35 ℃, the impact of Chunya coloring and quality. 10-15 days after the deduction is Huanmiao film period and should strive to raise the temperature during the day at around 30 ℃ Pengwen. After 1 month of natural light and temperature accumulation of spores after the eruption, the daytime temperature at 25-30 ℃, overnight control in 13-17 ℃, taken during the shoot to 18-25 ℃ temperature is appropriate. As the case stamped with grass thatch, paper is the temperature or warm. 2, the temperature regulation. Planted seedlings in greenhouses, root water uptake ability, which should maintain a relatively high initial soil moisture and air humidity, were irrigated after planting, depending on the situation after pouring small water. Air relative humidity above 85%, sunny days but also to the nursery water to prevent dehydration dry. After germination, the air relative humidity of 70% is appropriate, excessive humidity, not only slow germination, and the smell greatly reduced, should be promptly leaked Moisture. 3, light regulation. Toon happy light, should try to use Wu Dimo, opened in time during the day and grass thatch, paper is, they often clean membrane debris, to increase the light, if the light is too strong, may be appropriate to haloxyfop shade. 
 Second, topping promote branching. Harvested stubble in 2 toon, it will also remove the top of its stem (from 40 cm from the ground to play at the top.) 15% fixed paclobutrazol spray dry solution, the concentration of 200-500ppm, in order to control apical dominance, and promote the rapid growth of branches, to dwarfing cultivation. Since then under the tree growth, timely topping, pruning, to ensure that multi-branched crown, a prolific Chunya, to high yield and quality. 
 Third, water and fertilizer management. Toon for the fast-growing woody vegetables, less water demand, higher demand for potash fertilizer to each 300 square meters of greenhouses, base fertilizer to be the full maturity of about 2,500 kg of high quality manure, plant ash or potassium dihydrogen phosphate 3 75-150 kg -6 kg, 3-6 kg of diammonium carbonate. After each pick, force base, and growing Toona sinensis leaf color, amount of fertilizer, watering. 
 Four sets of separated light film. Guyu after the ground temperature above 18 ℃ can be removed in the films, so that the natural growth of seedlings. Although the rapid development of trees later, but easy to aging, should be ready early 2-color black and red two layer polyethylene film bag, when the Toon to 5 centimeters long, you can put on every light film. This can increase production, but also to ensure that Chunya not aging. When Chunya to 15 centimeters long, taken together with bags under the bags and then to sell, this film bags for multiple use. 
 Fifth, adopt bud and packaging. 40-60 days after the deduction film, when the Chunya grow to 15 cm, and a good color to start mining buds. Shoots should be taken in the morning and evening for. First crop of shoots (ie was born in the bud at the top of the branches) quality and color are good, the top grade, when the harvest should be in the 12-15 cm. Second, to 20 cm stubble bud, the timely harvesting and topping, and promote the issue of lateral, hidden buds, increase production. Can be harvested every 10 days usually 1, adopted at the discretion of fertilizer, water, and promote Chunya growth. 
 Toon listed in the Spring Festival, pick after finishing tied bundles, usually 50-100 grams per 1 bundle, sealed plastic bag into the mouth,