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The Study of Grafting Methods in Euphorbia pulcherrima Willd. ex Klotzsch
Freedom''、''V-14 Marble''及''Annette Hegg Dark Red''品種為材料，探討
接於易長側枝品種''V-14 Marble''及''Annette Hegg Dark Red''，側枝數與
差異，尤其是''Double''嫁接於''Annette Hegg Dark Red''，經摘心後高度
This study was tried to increase the survival rate of grafted poinsettia and grafting effect on plant height by using poinsettia cvs. Supjibi, Peter Star, Double, P8408, Freedom, V-14 Marble, and Annette Hegg Dark Red.In survival study of poinsettia cvs. Supjibi, Freedom and V-14 Marble, results showed that over 50% pot grafting plants died and under 5% grafted cutting plant died in the first week. However, lots of grafted cutting plants died after the third week. Therefore, it was considered that exudates would effect the survival of grafted poinsettia. In comparison of length and leaf number of both stock and scion, as stock length increased from 10 cm to 15 cm with leaf number keeping from 0 to 8 or 10; and as scion length increased from 7 to 10 cm with leaf number keeping from 0 to 1, the survival rate increased from 1% to 90% and above. Callus are established between stock and scion 10 days after grafting in transverse section of paraffin embedded observation.The restricted-branching cultivars will increase their branching potential if restricted-branching cultivars were grafted onto freed-branching cultivar, This study was tried to increase branching occurrence (horizontal growth), and to inhibit the vertical growth. Significant difference in branching occurrence were demonstracted when restricted-branching poinsettia cvs. Supjibi, Double and P8408 was grafted onto free-branching cultivar cvs. V-14 Marble, and Annette Hegg Dark Red. There were also significant differences in height after pinching when ''Double'' poinsettia was grafted on ''Annette Hegg Dark Red''.
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