Toona sinensis is also known as Toona sinensis, Toona sinensis tree and Toona sinensis bud. Native to central China, it belongs to Toona of Meliaceae. At present, the market demand of Toona sinensis buds is increasing year by year. Toona sinensis seed oil has high nutritional value. After a lot of experiments, the debittering process of Toona sinensis seed oil is mature and it is fully capable of developing Toona sinensis edible oil. In addition, Toona sinensis wood can also be used to make all kinds of high-grade furniture, sports equipment and ship materials. Its bark fiber can be used for papermaking and fruit can be used as medicine. 1. Cultivated technical varieties: There are about ten cultivated varieties of Toona sinensis in China, which can be roughly divided into two series: Toona sinensis and Toona sinensis. As a woody vegetable, it is better to choose Toona sinensis series, such as Toona sinensis, Toona sinensis brown, Toona sinensis black, Toona sinensis red, Red Bud Green and other varieties. The green Toona series, with straight trunk, is suitable as a fast-growing timber tree species. Seed collection: Toona sinensis blooms in May and June, and the fruit10-1month matures, and the fruit is reddish brown when it matures. At this time, seeds can be taken from the fruit. We should choose a tall and strong mother tree with the age of 15-30 years to collect seeds, and dry the cleaned seeds in the air with a 1000-grain weight of 15g and a germination rate of 40-50%. Seedling raising: Seeding and seedling raising are carried out in February-March, seeds are soaked in warm water to accelerate germination, and 3 kg is sown per mu, which can produce seedlings 10000- 15000. The method of burying roots and leaving roots can be adopted to raise seedlings, and about 20 thousand seedlings can be produced per mu. When the height of 1 annual seedling exceeds 1 m, it can be taken out of the nursery for afforestation. In addition, rootstock seedlings can also be used for afforestation. Farmers often dig out roots and tillers beside big trees for cultivation when greening around, and the survival rate is very high. Afforestation: large hole soil preparation, 50×50×50 cm, bare root seedling, afforestation in early spring. The initial planting density of timber forest is 2-3 meters; The initial planting density of vegetable forest is 240-300 plants per mu. Management: Young forests should be weeded and loosened twice 1-2 times. Vegetable forest should be dwarfed and pruned to promote branch germination. Because of the rapid growth of Toona sinensis, it is necessary to dwarf it in the same year of planting. It can be dwarfed by picking to keep the height of the tree at about 1 m. Toona sinensis buds can be harvested in the second year of planting, and a certain yield can be formed after 3 years. Generally, each plant can produce about 3 kilograms of fresh Toona sinensis buds every year. After 5 years, the plants can be leveled in turn, each time 1/3, and the stumps are kept for 30 cm to promote the growth of more sprouting branches. For vegetable Toona sinensis forest, 3-4 tons of timber should be applied per mu every year, and mixed fertilizer should be applied after picking Toona sinensis buds every time to ensure the nutrient demand of Toona sinensis and produce high-quality Toona sinensis buds. Greenhouse cultivation: About the middle of 1 October, the defoliated1year-old seedlings are dug up and transplanted in the greenhouse with a planting density of 0.2× 0.4m, and 75,000 plants can be planted in each hectare of greenhouse production land. Cultivation of Toona sinensis in greenhouse can ensure the large-scale production of Toona sinensis buds with good quality, but the management requirements are also improved accordingly. Second, the harvesting time of Toona sinensis bud harvesting technology: Toona sinensis bud was harvested too early and the yield was low; Picking too late, poor quality. The first bud, that is, the earliest bud sprouting at the top of the branch, should be harvested at12-15 cm, which is the top grade of Chinese toon buds with good quality and color. The second bud, that is, the lateral bud that germinates and grows after the first bud is harvested, can be harvested at about 20cm. At this time, pruning is not suitable, and 2-3 leaves should be left at the base to form auxiliary branches and restore the tree. The focus of Toona sinensis bud harvesting is the first crop bud and the second crop bud, and the third crop bud and the later buds have low yield and poor quality. Buds cultivated in greenhouses germinate regularly, which can be collected once every 10 day and 4-5 times. Harvesting method: It is best to harvest the buds of Toona sinensis with a knife and scissors, and try to avoid distinguishing the drops by hand, so as to avoid damaging the branches and affecting the re-germination. The collected Toona sinensis buds are bundled into bundles and packed in small bags to prevent wilting. If it can't be put on the market immediately, the buds can be soaked in clean water for 12 hours, then placed on a wooden frame in a single layer and stored at 0- 10℃ for several days.