Grafting technique of planting jujube

Jujube can still be grafted from July to September, and because of the vigorous growth of branches and the full development of buds, the survival rate of grafting is relatively high.

1. The new jujube heads of 1-2-year-old fine varieties suitable for local cultivation were collected by bark grafting, all jujube hangers and leaves were removed, the first and secondary branches of jujube were cut off and placed upright in plastic buckets filled with clear water for use. The scion is prepared to take a robust primary or secondary branch from the plastic barrel and cut it into segments of 5cm to 8cm, with the upper cut 0.5 cm from the bud hole and the lower cut not less than 5 cm from the bud hole. The scion is 2 cm in thickness and 2 cm in length on the back bud surface, and the lower end of the spike is cut off 0.5 cm in the same way, so that the scion is wedge-shaped on both sides. More than one-year-old jujube seedlings or wild jujube seedlings, scattered seedlings, root tiller seedlings and old nursery seedlings were selected as rootstocks. Cut at the base of the rootstock 3 cm to 10 cm above the ground, insert the scion between the rootstock cortex and cambium, the top is exposed 0.1 cm, and apply a little ooze at the joint of the scion and the rootstock (be careful not to cover the bud eyes). Tie the rootstock to the scion with a plastic strap, then cover the rootstock and the scion with a plastic film with a length of 8 cm, a width of 10 cm and a thickness of 0.006 mm. The top layer is close to the bud eye, and the lower layer seals the scion into the part of the rootstock. Finally, the binding part of the rootstock is fastened with plastic straps. After grafting management 8-10 days after grafting, the scions sprouted one after another, and most of them could break the membrane. For those special plants with weak growth and difficulty in breaking the membrane, sharp needles can be used to cut the film at the bud so that the scion can grow normally after sprouting. After that, the jujube seedlings should be removed normally for 2 or 3 times, and the jujube seedlings should be protected by a straight column when they grow to 30 cm high, so as to prevent the wind from blowing off the jujube seedlings.

Second, the method of collecting scions with woody buds is used to collect scions with excellent varieties and strong growth, no diseases and insect pests, full bud eyes, lignified tissue has been formed, annual branches with a diameter of 0.4 cm to 0.8 cm, all of them are cut into segments of 20 cm to 30 cm, wrapped in wet sand or wet gunny bags, sprinkled in time to keep moist, ready for use. Sour jujube seedlings with strong growth, no diseases and insect pests and base diameter of more than 0.5 cm were selected as rootstocks. First cross-cut the selected part of the bud on the rootstock, reaching to the xylem, and then cut the T-shaped interface 1.5 cm from top to bottom or 0.5 cm above the full bud of the scion, up to 1 cm 1.5 cm deep in the xylem. Quickly cut the buds from the bottom to the top with a knife 1-1.5 cm below the bud, the length is slightly shorter than the interface on the rootstock, and then stick the buds in the T-shaped interface of the rootstock. Align the cambium of the bud with the cambium of the rootstock (top and side) and tie it tightly with a plastic strip 0.5 cm wide. Management after grafting 15-20 days after grafting to check whether the grafted seedlings survived (the method is that the petiole fell off as soon as the hand touched the bud, but not when the unsurvived hand touched), and the unsurvived ones could be repaired in time. In the following spring, cut the anvil 2-2.5 cm above the surviving scion and remove the plastic strip to promote the survival and germination of the scion. Regular spraying management should be conducted during the growing season to prevent and control diseases and insect pests.