In recent years, the newly-planted apple seedlings generally have intermediate grafts to be grafted. Mature trees have large rot lesions that need to bridge circulation nutrients. Before and after the vernal equinox is an appropriate period for grafting of apple trees.
First, the grafting time
Saplings are grafted from mid-March to late-March. The use of budding or splicing, inlaying buds and growing in the weak province of the scion, and then growing rapidly. The bridging can be carried out throughout the growing season. In April, it will help restore the tree vigor. In the middle and late July, it will help to survive.
Second, grafting method
Embedding buds: cut down from 1-1.5cm above full shoots to below shoots, 2-4mm thick, cut one blade at the lower 1-1.5cm to remove buds, cut in the same way on the back of the rootstock Bud mouth. Rootstock wounds must be greater than or equal to the buds. The sprouts must be aligned on one side to form a layer, and then the 2-3cm wide plastic film strips should be used to tightly wrap the buds and the wound packs and leave the buds.
劈 : : :: The scion is cut into two horse-shaped noodles straightly on both sides of 4-5cm from the lower end, and the side of the scion is thick and thin so that the scion is wooden wedge-shaped. The rootstock should be cut once and the rootstock should be split from the middle at the cut-out to insert the scion. Note that the thick edges form a layer on the rootstock, aligned from top to bottom, and the scion wound exposes the interface 0.5cm, and the wound is tightly wrapped with a plastic strip. The scion was also mulched with plastic film to increase the survival rate. The buds were coated with a layer of plastic film and tightened. The sprouts were automatically broken out of the film.
Bridge: The upper and lower ends of the wound are properly peeled and trimmed to make the wound square, and then several knives are cut vertically on the skin from top to bottom and from bottom to top, and the cortex is cut off. The distance between the two blades is 2-3cm long. 3- 5cm, tear up as an interface. The length of one-year branches is appropriate, both ends are cut into tongues, and the interface is inserted. The skin is fixed with a small nail or tied with a thin rope, and then the interface and the scion are all wrapped with a film.
Third, pay attention to matters
1. The grafting site of the intermediate rootstock is no more than 20cm from the ground 10-15cm. The length of the entire anvil must be around 25cm. 2. Spoon noodles require straight, smooth, and can not be polluted to improve the survival rate. 3, after germination should be set up to prevent damage, to prevent bruising, and to promptly wipe rootstock sprouts, and promote budding germination long. 4. When the new shoot grows to 15-20cm, loosen it in time and set up the column binding protection to avoid wind break.
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