Toona sinensis, also known as Toona sinensis bud, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis, Toona sinensis. The root has two layers of bark, also known as white bark of Toona sinensis, which is native to China and distributed in the north and south of the Yangtze River, belonging to Meliaceae. Deciduous tree, dioecious, leaves with even pinnate compound leaves, panicles, white bisexual flowers, oval capsules, winged seeds, seeds can be reproduced.

The propagation of Toona sinensis can be divided into two types: sowing and seedling raising and ramet propagation (also called root tillering propagation).

Because the germination rate of Toona sinensis seeds is low, the seeds should be soaked in warm water at 30-35℃ for 24 hours before sowing, and then put at 25℃ to accelerate germination. Seeding when radicle comes into contact with rice grains (the lowest ground temperature during sowing is about 5℃). Generally, Shanghai is in the first half of March. After emergence, there are 2-3 true leaf seedlings and 4-5 true leaf seedlings, and the row spacing is 25x 15cm.

For propagation by dividing plants, the root seedlings of adult plants can be dug out in early spring and planted in Miao Di, and then planted when the seedlings grow to about 2 meters in the next year. You can also use the method of cutting roots and tillering. In late winter and early spring, dig a 60-cm-deep annular ditch around the adult trees, cut off some lateral roots, and then fill the ditch. Because the roots of Toona sinensis are easy to produce adventitious roots, new seedlings germinate at the top of the cut roots and can be transplanted the next year. Spraying a new layer of high-fat film after transplanting can effectively prevent water evaporation and seedling transpiration, isolate pests and diseases, and shorten the slow seedling stage.

After Toona sinensis seedlings are bred, they are all planted before germination in early spring. Planting Toona sinensis forest in a large area, with row spacing of 7x5m. The plants planted behind the canal and the house are all in a single row, with a spacing of about 5 meters. Water for 2-3 times after planting to improve the survival rate.