The difference between it and cuttings is stem. Cuttings survive by producing new adventitious roots on the inserted sugar strips, and cuttings survive by germination of adventitious buds formed on the ear roots. On the contrary, the grafting of incompatible species or species with poor affinity is not easy to survive, or even if it survives, the tree body is often poorly developed, some are easy to split from the interface, or the tree body is premature aging. In early spring, the ditch shall be opened at an appropriate place 2 meters away from the mother tree, with a width of 20 ~ 30 cm and a depth of about 40 star meters. The root system shall be cut off, and then the 5 gallon pots shall be filled with about 30 cm and watered to promote the root germination of the mother plant. The grafting period is long and can be carried out in the whole growing season, but it is best when the bark layer of viscose wood is easy to peel off. If the grafting bud does not survive, it can be grafted in time, which can ensure the yield of grafted seedlings per unit area. Using the open tube budding method, the grafting can not be cut and estimated. According to the thickness and length of the bud tube, the cortex is peeled off in a ring at the appropriate part of the sticky wood and warmed into the bud tube. For wax sealing, the wax should be cut and sealed before grafting. This method is simple, easy to master and has good effect, but it can be carried out only when the sticky wood is peeled. In recent years, this method has also been used for seedling grafting. The difference is that the foundation is cut immediately after the scion is inserted. The transplanted seedlings have a certain plant row spacing, expand the nutritional area of a single plant, and the nutrient distribution is equal, which is conducive to the growth of seedlings, improve the quality and seedling rate of seedlings, and cultivate good dry shape and crown shape through 15 gallon pots transplantation. When transplanting, the taproot was cut off to limit the growth of its taproot; In the south, for tree species with equal growth rate, when the seedlings grow up to 6 ~ 10 cm, they will be transplanted in the same year. For example, fast-growing school trees only take a few months, larch, Chinese pine, Platycladus orientalis, Liushan and other seedlings and broad-leaved trees are mostly 1 year, while spruce and Lengshan seedlings with slow growth are generally cultivated for 2 years. The seedlings should be irrigated immediately after transplantation, preferably twice, and the soil should be loosened timely after irrigation to improve soil permeability, so as to promote the growth of roots. In addition, after the bottle, pay attention to straightening the seedling stem and leveling the enclosure. The volume remains the same regardless of the amount of water. It has good water holding, water and fertilizer holding performance and good ventilation. Applying more base fertilizer in the container is easy to burn seedlings. Therefore, top dressing should be the main way to raise seedlings in 10 gallon pots. In places with superior natural conditions, the form of industrialized seedling raising is combined with the form of open container seedling raising. In places with poor natural conditions, the form of plastic greenhouse container seedling raising is mostly used.