Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (17): 3643-3650.doi: 10.3864/j.issn.0578-1752.2013.17.013

• HORTICULTURE • Previous Articles     Next Articles

Effects of Bud-Notching, Twisting Shoot and Removing Terminal Shoot on Branches Hydraulic Conductivity, Hormone Content and Flower Bud Formation of Fuji Apple

 LI  Xue-Wei-1, LI  Bing-Zhi-1, LIU  Fu-Ting-1, ZHANG  Lin-Sen-1, HAN  Ming-Yu-1, XU  Sheng-Rong-2, ZHANG  Yong-Wang-1, LIU  Hang-Kong-1   

  1. 1.College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi
    2.College of Forestry, Northwest A & F University, Yangling 712100, Shaanxi
  • Received:2012-11-12 Online:2013-09-01 Published:2013-04-19

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Abstract: 【Objective】The aim of this study was to investigate the characteristics of Fuji branches hydraulic conductivity, hormone content and flower bud formation under the treatments of bud-notching, twisting shoot and removing terminal shoot, and then find the best method to promote flower bud formation.【Method】The 3-year-old field-cultivated Fuji (Malus domestica Borkh cv.Red Fuji /M26/M. sieversii (Ledeb) Roem) were used as materials to explore the changes of branches hydraulic conductivity, lateral buds hormone content, shooting percentage, flower bud formation and average yield per tree treated by bud-notching, twisting shoot and removing terminal shoot together after shoot-bending.【Result】Compared with the control, the integrated method of bud-notching, twisting shoot and removing terminal shoot together with shoot-bending significantly decreased stem and leaf area specific conductivity by 41.4% and 39.1%. The endogenous IAA, GAs in lateral buds treated with the integrated method decreased, while ZR, ABA content increased at flower bud differentiation stage. The shooting percentage enhanced by 32.7% in comparison with the control. The amount of blossoms and average yield per tree increased 2.3 times and 3.3 times more than those of control, respectively. The changes of branches hydraulic conductivity and lateral buds hormone content weakened tree vigor, while accelerated flower bud differentiation. The methods of bud-notching and removing terminal shoot after shoot-bending both had effects on Fuji flower bud formation, but the effects of the integrated method of bud-notching, twisting shoot and removing terminal shoot together with shoot-bending was most significant.【Conclusion】The integrated method of bud-notching, twisting shoot and removing terminal shoot together with shoot-bending inhibited tree vegetative growth, thus resulted in acceleration of flower development and increase of yield significantly.

Key words: shoot-bending , bud-notching , twisting shoot , removing terminal shoot , promote flower bud formation

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