Detailed Explanation of Summer Bud Grafting Techniques and Methods for Jujube Trees
Pre-grafting preparation: Select wild jujube (Ziziphus jujuba var. spinosa) seedlings that are vigorous, free of pests and diseases, and have a basal stem diameter of more than 0.5 cm as rootstock. Cut vigorous, pest-free, plump-budded, current-year lignified branches as scions, 0.4-0.6 cm thick, remove the leaves but keep the petioles. Cut the scions into 20-30 cm long sections, wrap them in wet sand...
Pre-grafting preparation: Select wild jujube seedlings that are vigorous, free of pests and diseases, and have a basal stem diameter of more than 0.5 cm as rootstock. Cut vigorous, pest-free, plump-budded, current-year lignified branches as scions, 0.4-0.6 cm thick, remove the leaves but keep the petioles. Cut the scions into 20-30 cm long sections, wrap them in wet sand or wet burlap for moisture retention during storage and transport, and be sure to spray water promptly.
Grafting: Make a horizontal cut on the rootstock at the bud attachment site, deep enough to reach the xylem, then make a 1.5-2 cm long "T"-shaped incision from top to bottom. Make a horizontal cut 0.5 cm above a plump bud on the scion, 1-1.5 cm deep into the xylem. Make an upward cut from 1-1.5 cm below the bud to remove the scion, slightly shorter than the incision on the rootstock. Insert the bud into the "T"-shaped incision on the rootstock, align the cambium of the bud patch with the cambium of the rootstock, and tie it tightly with a 0.5 cm wide plastic strip.
Post-grafting management: 15-20 days after grafting, touch the petiole on the scion with your hand. If it falls off at the slightest touch, it proves that the graft has not taken, and timely re-grafting should be done. In the spring of the following year, remove the plastic strip and cut the rootstock 2-2.5 cm above the grafted bud to promote the survival and sprouting of the grafted bud.