In the middle of the new dwarf apple young garden, the grafted seedlings or mature trees have large rot lesions that need to be bridged for circulation and nutrition. Generally, the apple tree grafting period is suitable before and after the vernal equinox.
Grafting time saplings are grafted from mid-March to late March. The use of bud grafting or splicing, the buds are connected to the weak and the stalks are stalked, and the splicing is prosperous. The bridge can be carried out throughout the growing season, and the tree will be restored in April, and will benefit in the middle and late July.
Grafting method: bud grafting: cut from the 1-1.5cm above the full bud of the variety to the bottom of the bud, the thickness is 2-4mm, then cut the bud piece at the lower 1-1.5cm and then cut the bud on the back of the rootstock. Cut the buds. The rootstock wound must be larger than or equal to the bud, and then tightly wrapped with a 2-3 cm wide plastic strip to wrap the buds and wounds and leave the buds.
Splicing: The scion is cut into two horse-shaped noodles on both sides at 4-5 cm from the lower end, and cut into a thick side and thin, so that the scion is in the shape of a wooden wedge. The rootstock should be cut flat at one time, and the rootstock should be opened from the middle at the cut and inserted into the scion. Note that the thick side forms a layer on the side of the rootstock, aligned from top to bottom, and the joint of the scion is exposed 0.5 cm, and the wound is tightly wrapped with a plastic strip. The scion is also covered with a mulch film to increase the survival rate. The bud is covered with a layer of mulch and tightened, and the granules are automatically ruptured when germinated.
Bridging: The upper and lower ends of the wound are properly peeled and trimmed to make the wound deformed. Then, several knives are cut vertically from the top to the bottom and from the bottom to the top, and the cortex is cut. The distance between the two knives is 2-3 cm long. 5cm, tear up as an interface. The length of the annual shoots is appropriate, and both ends are cut into tongue pieces and inserted into the interface. The skin is tied with a small nail or tied with a thin rope, and then the interface and the scion are completely wrapped with a film.
Matters needing attention 1. The grafting position of the middle anvil is 10-15cm from the ground, and the length of the whole intermediate anvil must be about 25cm. 2. The scioning surface needs to be smooth and not polluted to increase the survival rate. 3. After germination, it is necessary to set up a barrier to prevent bruises, and timely smear the rootstock to promote the growth of buds. 4. When the new shoot length reaches 15-20cm, loosen it in time and set up column binding protection to avoid wind folding.
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