Vegetative Propagation of Cornus officinalis

The seedlings of Cornus officinalis can only blossom and bear fruit after 6 years of afforestation, while the good characters of the mother plant can be maintained by using vegetative propagation seedlings, which can blossom and bear fruit in 4 years. The common vegetative propagation methods are cutting, grafting and striping.

1. Cutting propagation is generally selected from April to May. On the excellent type of mother tree, the 2012 branches with strong growth and no diseases and insect pests are selected and cut into cuttings 15 cm to 20 cm long. The upper incision is cut into a flat cut, and the lower incision is cut into an oblique notch. About 4 leaves are retained on the cuttings, and the rest of the leaves and petioles are all cut off. Use humus and fine sand in equal proportion to make a cutter, trench according to 20 cm row spacing on the cutter, cut 8 cm to 10 cm plant spacing in the ditch, and cover the soil at the same time. Pour water once after insertion and cover the agricultural film. Remove the agricultural film in mid-June and put it in a shade with a transmittance of 10%. It will take about 90 to 100 days to take root and survive.

two。 Grafting propagation of Cornus officinalis is generally carried out by seedling grafting, and other species of the same family, such as smooth bark tree, lampstand tree, Sizhao flower, etc., can be used as rootstocks. For the seedlings used as rootstocks, it is best to grow in 2012 and the stem is 0.6 cm to 1 cm. Select an excellent type of middle-aged mother tree that is strong and disease-free, collect fully developed annual branches in the middle and upper part of the crown, cut them into 10 cm to 15 cm long, and seal the upper and lower incisions of the scion with paraffin wax. After sealing the wax, store the scion in a low temperature place for grafting. The suitable grafting period is from April to September.

3. Striping propagation every autumn in October, select the excellent type of mother tree with strong growth and about 10 years old, bend the sprouting branches around the rhizosphere or the branches close to the ground to the ground, and carve them to the xylem where they are ready to take root. Then it is buried in a 15cm hole, compacted with soil, the branches exposed above are fixed on the wooden stake, and the management is strengthened, and the new roots are cut and planted with the mother plant.