Sowing reproduction
翅果成熟时,树枝被切断,dried to remove impurities, and then dried. The germination power of the seeds can be maintained for 2 years. Generally, the seeds are sown from early March to late April. Before sowing, they can be soaked in warm water at 40°C for one day and night, which can be 5-6 days in advance. The sowing amount is 5-8 kg/667 square meters, the row spacing is 25-40 cm, the soil is 1-1.5 cm, and the germination rate can reach 85%. The suitable temperature for seed germination is 9-15℃, annual seedlings are as high as 60-100 cm, and the ground diameter can reach 0.5-1.5 cm.
Cutting propagation
Root cutting propagation: The cutting root seedling raising method is the simplest and most convenient method of raising seedlings in cutting propagation. It only needs to collect roots and ears for cuttings every year. When inserting, select strong roots and cut them into 20 cm long cuttings. In order to prevent inverted cutting, the lower cut is oblique and the upper cut is flat. Generally, the root cuttings are soft, and the method of ditching and oblique burying is usually adopted. The burial attachment requires the upper cut to be flush with the ground. If the maintenance is well managed, the roots can grow up to 2 meters high.
Propagation of cuttings: When breeding cuttings, choose fully lignified annual sprouts. First cut the length of the branches 25 cm to make cuttings. The upper cut is flat and the lower cut is oblique to distinguish between upper and lower and promote rooting. It is best to use high pads and oblique inserts when inserting. After inserting, cover with mulching film for heat preservation, moisturizing and maintenance to improve the survival rate of reproduction.
Grafting reproduction
In spring, the seedlings of Ailanthus altissima obtained by sowing the ordinary Ailanthus altissima seeds in the open field are used as rootstocks. From June to August, a thousand-head rows of scions are used for budding, and the survival rate can reach over 90%. In addition, in early spring, you can also use the split splicing method for high branch exchange on the big seedlings of Ailanthus altissima. Thousand-head chrysanthemum grafted seedlings can maintain their original excellent traits and are also widely used in production.