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KMID : 0903619970380030303
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Journal of the Korean Society for Horticultural Science
1997 Volume.38 No. 3 p.303 ~ p.308
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Effect of Photoperiod to Stock Plant , Temperature , Media and Plant Growth Regulator Pretreatment on Root Development and Quality of Cuttings in Carnation Plug Cutting
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Abstract
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This study was conducted to examine the effects of photoperiod to stock plant, temperature, media and plant growth regulator pretreatment on root development and cuttings quality in Dianthus caryophyllus L. ´Desio´ plug cutting. Rootball diameter and root length markedly increased with 8h day length+Hormex treatment. Dipping with NAA (1000 ㎎·L^(-1)) for 10 s increased the rootball diameter, root length, rooting zone, shoot length and rooting rate. Rootball diameter and root length increased with hot water pretreatment at 40 C for 5 or 10 min. Hot water and plant growth regulator pretreatment resulted in 100% rooting rate. 40% and 60% moisture contents of tissue paper in the box during cold storage were effective in enhancing rootball diameter and shoot length. Rootball diameter was promoted by low temperature treatment at 5 C for 2, 4, 6 weeks. Especially, rootball diameter and rooting rate increased with low temperature treatment after NAA or NAA+benomyl dipping pretreatment. Rootball diameter, root length and shoot length in media on the rooting of plug cuttings were best improved by vermiculite and peatmoss mixture (1:1, vlv) treatment.
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