Abstract: Taking SN14-6-17E apricot trees as the research object, the dynamics of shoots and fruits growth and development of SN14-6-17E apricot were studied. The results showed that SN14-6-17E shoots had three growth peaks during the annual growth cycle, forming spring shoot, summer shoot and autumn shoot respectively. SN14-6-17E bloomed on March 24th, and the fruit matured on May 21th, with a growth period of 59 days. There were two growth peaks during the fruit development, presenting a double “S” shaped curve. The growth of new shoots was closely related with the development of fruits. In the early stage of fruit development, the competition of nutrients between shoots and fruits was fierce, but in the middle stage, the competition was weakened, and the nutrients needed for fruits were gradually transferred from the stored nutrients in the tree to the nutrients produced by photosynthesis of new leaves. At the later stage of fruit development, some shoots stopped growing, and the organic matter accumulated by photosynthesis in leaves provided nutrition for fruit expansion.

Key words: very early maturity apricot, shoot, fruit, growth and development