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| Effects of pruning on shoots growth, blooming andfruit-bearing of Averrhoa carambola |
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| Abstract: |
| In order to understand the responses of Averrhoa carambola to various shaping and pruning measures,
effects of retractive pruning, short cutting, branch thinning, branch bending on buds germination, shoots growth and
blooming were studied with Malaysia sweet carambola No.1 cultivated in plastic greenhouse as test material from May to
September. Results showed that the lateral bud germination rate reached 40%-50% after the carambola were retractive
pruned or short cut from May to July, and 80% of the new shoots that germinated after retractive pruned in mid-May or
short cut in mid-July could come into blossom in that year, while only about 35% of the strong branches that germinated
after retractive pruned or thinned in mid-July could be in blossom in that year. Retractive pruning and branch thinning
could increase single fruit weight and the fruit firmness significantly, and short cutting could improve the fruit firmness
significantly. Branch bending in early September could prompt erect branches to bloom extremely significantly, of which the
blossom rate was 60% higher than that of the control. Accordingly, it was not suitable to prune the carambola too
frequently, and for those that really need prune in the plastic greenhouse, retractive pruning should be carried out in May
with removing lateral buds, adventitious buds, weak shoots and shaded branches properly. Priority should be given to short
cut, remove buds and weak shoots moderately after July, and to bend branches for prompting erect branches to bloom in
early September. After reasonable pruned, fruit quality has improved remarkably due to the improvement of carambola
tree's light conditions and nutritional status |
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