Effects of different pruning methods on regeneration and rejuvenation of blueberry trees after stumping treatments
To investigate the impacts of different pruning methods on the regeneration and revitalization of aging blueberry plants after stem pruning,the 'Reka',a 12-year-old northern highbush blueberry cultivar,was used as the experimental material. Various pruning timings and techniques were implemented to assess their effects on growth indicators,flower bud formation numbers and photosynthesis characteristics. Following comprehensive evaluation through principal component analysis,it was observed that when employing the same pruning method,the treatment conducted on June 15th exhibited superior overall performance in terms of growth and photosynthesis characteristics compared to the treatment performed on July 15th. In relation to short pruning treatments,no flower buds were formed across any of the treatments;however,evaluations based on other indicators indicated that light pruning yielded better results than moderate or heavy pruning. Regarding thinning treatments,heavy thinning outperformed moderate thinning which in turn surpassed light thinning according to overall evaluations. For combined thinning and short pruning treatments with selection of 10-15 main branches,light pruning achieved the highest overall evaluation score followed by moderate pruning while heavy pruning obtained the lowest score. Among all treatments considered in this experiment,those involving 10-15 basal branches with a 2/3rd rate of June 15th proved most suitable for practical application based on their highest overall evaluation score.
万方数据
维普
