Effects of various training methods on dry matter production and assimilate partitioning of young filler trees of Japanese pear 'Gold nijisseiki' [Pyrus pyrifolia]
2006
Yoshida, A.(Tottori Univ. (Japan)) | ; Murao, K. | ; Ikeda, T. | ; Murata, K. | ; Inoue, K.
To obtain early and high yield from young trees of the Japanese pear 'Gold Nijisseiki', the effects of different training systems on the dry matter production and distribution of above ground organs were investigated. Permanent trees with 3 scaffolds and filler trees with 6 different tree forms having 3 to 12 scaffolds were compared. The dry matter production of the above ground organ was increased in training systems with larger numbers of scaffolds. The dry matter production of the above ground part was higher in the training systems with larger numbers of scaffolds. This tendency indicated that the assimilate partitioning rate for fruit was higher in training systems with a larger numbers of scaffolds. Higher partitioning rates were shown for training systems with a smaller number of scaffolds in both the shoots on 4 to 6-year-old trees and older wood on 6 to 8-year-old trees. There was no significant difference between plots in the dry matter production above the ground per dry weight of leaves. However, the dry weight of fruit per dry weight of leaves remained higher in the plot with large numbers of scaffolds. Filler trees with larger numbers of scaffolds showed higher rates of assimilate partitioning on dry weight of fruit and higher efficiency of fruit production.
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