What are the breeding methods of Chimonanthus praecox?

1. layering propagation. Chimonanthus praecox is layered with stump modeling after flowering every year. When layering, choose biennial branches with good lighting conditions, strong plants and strong physiological tissue activity. During operation, the cortex of the part to be cut should be cut and peeled off. Generally, the width of the ring mouth is 1.5 ~ 2.0 cm, as deep as the xylem. Be careful not to hurt xylem when cutting, otherwise it will affect the survival. After peeling off the cortex of the annulus, wrap it with a white plastic film, then wrap the incision with culture soil, thoroughly water it, tie both ends tightly, and then wrap it with a thick layer of paper. Management is mainly to keep the rooting matrix moist and make the wound heal and take root. Generally, it can be cut in the autumn of that year and cultivated separately to become an independent new plant.

2. Sowing and propagating, the fruit of Chimonanthus praecox will not mature until autumn. Ripe fruit is like a small bell, very beautiful. At this time, the breeder can sow and reproduce with the seeds. The sowing and propagation method of Chimonanthus praecox is also relatively simple. After picking ripe fruits, soak them in warm water for 24 hours, take them out, put them in a pot, cover the seeds with 2-3 layers of wet gauze, and dry them in the sun for 6-8 hours during the day (keep the gauze moist). Put the culture pot in a warm place at night and keep the room temperature at 25-30℃. In this way, after a week of cultivation, the seeds can germinate the germ, and then the seeds are evenly planted in the prepared seedbed, and the seeds should be covered with a layer of fine sand. In order to keep the soil moist and control the temperature, the seedbed can be covered with white plastic film. Generally, seedlings will break through the ground 4-5 days after sowing, and the height of seedlings can reach about 30 cm when the first frost comes. Chimonanthus praecox seeds are mainly used for sowing. Cultivate rootstocks and graft rare wintersweet varieties.

3. Grafting propagation, Chimonanthus praecox grafting, usually using the method of twig grafting. The time is from April to May in late spring, and the rootstock can be potted in the autumn of the first year, and the rootstock branches can be cut flat from 2 cm to promote growth and make them sprout in spring. The scion must also be a young branch that grew in the same year, and its varieties can be excellent varieties such as Jiangsu, Zhejiang and Anhui. When the branches grow to flesh color, cut 7 ~ 10 cm and leave 2 ~ 3 pieces. Use a sharp knife to cut the lower end of the scion into a wedge-shaped inclined plane with a length of 2 cm. Rootstock and scion have the same diameter, and the incision should be flat. Cut 3 cm down from the top, then quickly insert the scion into the incision of the rootstock and align it with the cambium on both sides, then wrap it with white plastic strips, put on a moisture-proof and heat-insulating plastic bag and put it in a shade shed. Half a month after grafting, you can take a breath every 2 ~ 3 days in the morning and evening. 1 month later, remove the plastic bag, shade it at noon, and gradually carry out normalization management. According to the experience of Rugao and Huaiyin, Jiangsu Province, the survival rate of subcutaneous grafting is high, and the most suitable time is when the leaf buds of Chimonanthus praecox expand to the size of wheat grains, and around Tomb-Sweeping Day.