核桃嫁接技术（Grafting technique of walnut）.docVIP

核桃嫁接技术（Grafting technique of walnut） grafting The grafting took place between late March and early April. First, the scion was collected, and in mid March, when the buds were about to sprout, 1 year old branches with strong growth and no disease and insect were collected as scions, and the varieties were harvested for wet sand storage. In early April, the rootstock of walnut was germinated and grafted. Rootstock requires roughness of about 1.5cm, grafting l0cm from the ground. When the grafting of walnut bleeding, not easy to survive, must be within 12 hours before grafting wounds to xylem water in the rhizosphere, and then split or bark grafting, then with plastic strips tied for the upper end of the wound, the scion paint to prevent water evaporation. After the survival of the timely addition of MOE relaxation, relaxation time to new growth of slightly more than 20cm is appropriate. To be in the grafted seedlings grew to about 40cm, fixed with small bamboo rod or stick with windproof folding. The highest efficiency and the highest survival rate of grafting method for square budding. The grafting time in North China from May 20th to June 20th; selection of scion, grafting knife with cutting growth of 3~4 cm, 0.8 cm wide around the box, broke off, and then in the ground more than 30 centimeters of annual stem resection and bud epidermis and cut down considerably, the water outlet; the bud into the incision, and try to keep the lower side combining with the film closely packed, dew; sprouting; interface stay for more than 3 compound leaf cutting stock; at any time after the erase bud bud bud grafting to grafting; 15 cm, without help. The survival rate generally reached more than 80% Double edged knife A walnut grafting knife is the best tool for summer budding. Walnut double edged grafting knife from the root bark and branches on the bud, the upper and lower distances are equal, quite right, So the survival rate is high; because it is a budding knife, once engraved w