Shoot growth of young 'Red Fuji' apple trees on different dwarfing interstocks in annual cycle

摘要

Shoot growth in young 'Red Fuji' apple trees on 6 dwarfing interstock types was observed in annual cycle. The effects of different interstocks on overwintering of young trees and formation of flower buds were also investigated. The results showed that the spring shoots of young 'Red Fuji' apple trees on the interstocks SH.38, SH.40 and SH.28 ceased growth latter; but autumn shoots ended growth earlier; leaf color in late autumn could be normally changed and detached in time; contents of soluble sugar, starch and protein were higher; the content of total nitrogen was lower; no any spout was observed during overwintering, the tree was in blossom at 2-year-stage. Flower number per plant and the rate of plants in blossom were significantly higher than that on the control M.26 and other interstocks.