ISHS Acta Horticulturae 587: International Symposium on Asian Pears, Commemorating the 100th Anniversary of Nijisseiki Pear
EFFECTS OF TRAINING METHODS ON TREE GROWTH AND YIELD IN YOUNG TREES OF JAPANESE PEAR 'GOLD NIJISSEIKI' |
| Authors: | A. Yoshida, T. Ikeda, K. Murata, K. Inoue |
| Keywords: | canopy development, dry matter production, filler tree, pruning, scaffold limb, yield efficiency |
| Abstract:
The effect of the different training methods of young trees on growth and fruit production of ‘Gold Nijisseiki’ were compared, and effective management method was considered for the early increase of fruit yield. Permanent trees with 3 scaffolds (PT) and filler trees with 3, 4, 6, 12 scaffolds were tested. The canopy area, fruit yield and dry matter production per tree were related to the number of scaffolds. Productivity of the filler trees with 12 scaffolds (12-SF) was the greatest in comparison with the standard 3-scaffold trees. Yield efficiency of 12-SF was higher than PT. The yield in combining the PT and 12-SF, reached 51 ton per hectare in 6 years after planting, which was 30% higher than the case in which all trees were uniformly trained to the 3-scaffold tree, that is, combining the PT and the filler trees with 3 scaffolds (3-SF). The role of the filler tree is to bring the increased yield by rapid spreading of canopy. In this meaning, the filler tree with larger number of scaffolds is effective for early yielding. | |
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