Research on High Grafting Technique of Blueberries

In order to explore the high grafting technique of blueberries, the 6-year-old sharp blueberries were used as rootstock and the branches of three blueberry varieties, O'neill, Brilliant and Peak, were used as scions. The effects of different seasons, different grafting weather and different scion positions on the survival rate of high grafting and the growth rate of scion new shoots were studied and analyzed. The results showed that there was no significant difference in grafting survival rate between spring and autumn, and there was extremely significantly difference in the growth rate of scion new shoots between spring, summer and autumn, and autumn was the worst season. Grafting in summer (June) with moisture preservation and shade could effectively improve the grafting survival rate. Grafting with pruned branches of early and medium varieties did not affect the annual fruit yield of blueberries in the current year, and the new shoots could obviously accelerate the growth and development process of grafted plants and caould blossom and bear fruit in the second year. The survival rate of grafting in different weather was significantly different, the best grafting was in sunny days, and there was no significant difference in the growth of scion's new shoot. The survival rate of grafting at different scion positions and the growth rate of new scion shoots were significantly different, with the middle scion being the best. Therefore, the blueberry high grafting method of selecting scions in the middle of branches to graft on sunny days in summer (late June) might be the best way.