Abstract:
【Objective】 To explore the suitable methods of bud-notching and branch-bending of Korla fragrant pear young trees under the labor-saving and dense planting mode.
【Method】 3-year-old Korla fragrant pear was taken as test material in the experiments to study the effects of different bud-notching and branch-bending treatments on germination, branch and leaf growth.
【Result】 The results showed that bud-notching increased the germination rate. After bud-notching, the germination rate was between 80% and 97%, the proportion of long branches increased, and the flower formation rate was higher than 2/3 of the circumference of the cut branches during germination. The leaf length and width, leaf area, fresh weight of louver and chlorophyll SPAD value of the 90-degree-of-branch-pulling leaves were the highest, and the highest flowering rate of the 90-degree-of-branch-pulling leaves was 15.48% on June 23rd. The net photosynthetic rate of leaves increased and the intercellular CO
2 concentration decreased after branch pulling. On June 23rd, the net photosynthetic rate of leaves with 90 degree branch pulling reached the highest value of 9.55 μmol/(m
2·s), and the transpiration rate and water use efficiency of leaves with 90 degree branch pulling were also higher than those of other treatments.
【Conclusion】 According to comprehensive analysis, Korla fragrant pear young trees should be carved at the germination stage, and the length of carved injury is 2/3 of the circumference of branches; Under the labor-saving and dense planting mode, the best effect is to pull branches 90 on June 23rd.