Effects of Pinching on Flower Bud Formation and Differentiation of Sweet Cherry

摘要

In order to study the relationship between shoot pinching and flower bud formation, differentiation progress of sweet cherry, the shoot of sweet cherry 'Hongdeng' were pinched at different length (6~10cm, 1 l~15cm, 16~20cm, 20~30cm), effects of shoot pinching on flower bud formation and shoot growth stop were evaluated, and the flower bud differentiation progress of pinched shoot and bouquet-like branches were observed microscopically following hand-slicing. Results showed that flower bud formation could be promoted by shoot pinching treatment. Ratios of bloom were highest when pinched at 11-15cm and 16-20cm, reached 89.5% and 87.4% respectively. But the shorter pinched shoot leads to sprouting of lateral buds. Through microscopic observation, flower bud differentiation of pinched shoots were about 10 days later than that of the bouquet-like branches, but both of them could come into pistil differentiation phase in late September.