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KMID : 0903619870280010077
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Journal of the Korean Society for Horticultural Science
1987 Volume.28 No. 1 p.77 ~ p.87
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Studies on the Propagation of Forsythia Species by Cutting
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Yeam Do-Yi
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Abstract
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This study was carried out to elucidate the optimum season for the propagation of Forsythia species by cutting. Special interest was given to know the possibility of mass propagation of F. mandschurica, which is known to have many desirable characters; however, it is difficult to propagate by cutting. The results are summarized as follows:
1. The cuttings of F. koreana and F. saxatilis showed high rooting rate during the period from April 15 to October 1. The growth of shoot and leaf was more favorable during the spring (April to June) than the fall.
2. The cuttings of F. ovata also showed high rooting rate (April 15 to October 1), whereas the root growth was worse than that of F. koreana.
3. The cuttings of F. mandschurica showed the lowest rooting rate among 4 spy. examined. The rooting ability decreased sharply after July 15.
4. There was a close correlation between rooting potential and the level of endogenous growth substances.
5. ABA-like-substances seemed to appear after October 1 in F. ovata and F. mandschurica.
6. The rooting from the cuttings of F. mandschurica was increased by IAA, IBA, and NAA (3,000 ppm for 5 seconds) with no significant effect on the growth of shoot and leaf.
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