Ring-knocking and high-pressure propagation is to change the conventional high-stem pressure strips to ring knocking and retain the phloem to form more callus rooting tissues. It has the advantages of early rooting, multiple rooting, high rate of seedling growth, and rapid growth after planting. This method can be used for longan, litchi, ginkgo, citrus and other fruit trees and Magnolia, sweet-scented osmanthus, crape myrtle and other flowers and cedar, Cypress, Metasequoia and other precious tree species of high-pressure seedlings. Now introduce its specific methods for reference. Strip selection Fruit trees should be selected as high-pressure mother trees for plants with good quality, high yield, and no pests and diseases; other tree species must also meet the requirements for the selection of quality indicators. Plants without pests and diseases are high-pressure mother trees. In the selected high-pressure mother tree, in the easy-to-operate position, thick and straight shoots of 2-3 years are selected as high-pressure shoots. Ring knocking method It can be done in the spring and summer. In the high-pressure area (about 15 cm from the place where the high-pressure shoots were planted), a small wooden rod was used for the ring tapping. It is advisable to strike a width of about 6 cm. The bark must be broken, but it cannot be knocked off. After 3-4 days of ring knocking, the nutrient soil can be bandaged. Package nutrition soil First use a plastic film in the high pressure area around 2-3 circles, was 25 centimeters long, 10 centimeters thick cylinder, and then fasten the bottom of the membrane tube, and then fill the membrane tube with nutrient soil (humus plus 20% of the human fecal urine mixed Uniform compaction) Finally, at the point 5 cm above the area of ​​the ring, the upper end of the membrane tube is tied with a rope to make it spherical in the middle. Management measures After dressing the nutrient soil, the poorly-grown foliage on the high-pressure branch should be cut off. Regular injection of water into the soil with a syringe to keep it moist. In general, the high-pressure shoots are well rooted, and they can be cut off from the mother tree in the spring of the following year, and the fixed tube can be removed. Rushan Jinguo Food Co., Ltd , https://www.jinguofood.cn