Winter rooting and seedling raising technology

Rooting is a seedling method that uses roots as rootstocks to graft cultivars onto roots. The period of rooting is the same as that of branches, and it is mainly carried out during the dormancy period of seedlings. After the seedlings are planted in the autumn, one-year-old roots with a diameter of 1 cm or more are selected and cut into 10 cm to 15 cm root sections. Each root section of anvil should bear several fibrous roots. If there are no fibrous roots, the length should be lengthened and a wound should be made on the root to promote lateral roots. After being cut, it is buried in the ground kiln with wet sand. During storage, pay attention to keep the humidity of the sand, prevent excessive dryness or excessive humidity, and pay attention to the temperature in the kiln to prevent the rootstock from heating or freezing. Scion selection and development of robust, no pests, annual diameter of about 0.8 cm in the development of branches, can be used in the pruned branches in winter preferred. Buds that have sprouted are not suitable for scioning. When grafting, the scion shall be first cut into wedge-shaped noodles and inserted into the incision of the thicker end of the anvil. The anvil root and the scion forming layer shall be in close contact with each other. If the anvil root and the scion are not the same in thickness, the root is thinner than the scion, and the root is cut into a wedge-shaped noodle, which is attached to the ear, and the side of the formed layer is closely aligned. This is whether the root connection can be successful. The essential. After picking up, they are tied tightly with fine hemp skin and stored in a seedbed or kiln, covered with wet sand. It should be noted that the binding must be hemp skin, because the rooted interface is buried in the ground and it is not easy to release the restraint after survival, and the skin is naturally eroded by being buried in wet soil. If bundled with plastic film strips, it will hinder the growth of grafted seedlings, even cut off from the interface, causing seedling death. The temperature of the seedbed and the kiln should be maintained at 4°C-7°C to facilitate the formation of callus at the junction. In the middle of March of the following year, planting in nurseries, the fibrous root on the anvil root should be stretched when planting. The depth of planting should be suitable for the scion buds and the ground. After planting, pour water once to promote the growth of new roots, and then follow the conventional management methods for top dressing, irrigation, weeding, and prevention of pests and diseases.

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