한라구절초의 삽목증식 및 육묘환경 연구

Abstract

In the present study, we investigated seedling environments, growth properties and rooting characteristics in response to natural habitats' properties as well as cuttage methods in order to provide basic research data for preservation as well as industrialization of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch. Dendranthema coreanum (H.Lev. & Vaniot) Vorosch is distributed around rocky land of the summit of Baekrokdam and valley slope of Youngsil-trails of the Halla mountain in the form of non-continuous and independent colonies. Rooting characteristics of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch were investigated in response to growth periods in vinyl moist chambers and green houses of breeding facilities; in results, the rooting rate was found to be highest (77.8%) for the stems grown in the green house followed by stems in the vinyl moist chamber (56.6%), surface runners in the green house (43.3%), surface runners in the vinyl moist chamber (35.6%), leaves in the vinyl moist chamber (21.1%), and leaves in the green house (17.8%), respectively. We further studied effects of growing containers on the rooting rate of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch when cuttage; as results, the rooting rate was highest in the cuttage boxes (96.7%), followed by 90 mm ports (93.3%), and 32 cell plug trays (81.7%), respectively. When it comes to the pretreatments in order to remove rooting inhibitors, limewater was shown to be most effective (97%) yet was not statistically significant compared to others. In the shading experiment, in an attempt to find their effects on growth properties of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch when seedling, the group with 75% of shading represented approximately 50% or more increase in growth of aerial part compared to those with 50% of shading. For raising of seedling of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch, effects of amount of applied fertilizer on growth changes were studied; the rate for taking roots was highest in the group with no treatment (70.0%) followed by the osmocote (66.7%), nitrogen 1kg (63.3%), nitrogen 5kg (53.3%), nitrogen 10kg (46.7%), nitrogen 20kg (23.3%), respectively. When it comes to the length of aerial part, the group treated with nitrogen 1 kg had the highest (61.4 mm) whilst the length of subterranean part was longest in the group treated with osmocote (127.2 mm). In addition, the group with osmocote had the highest numbers of roots and biomass as 5.6 roots and 2.3 g per each, respectively. Taken altogether, for breeding of Dendranthema coreanum (H.Lev. & Vaniot) Vorosch, stems and cuttage plates should be utilized for cutting slips and cuttage, respectively. In addition, in order to provide more stable seeding environment, it is considered that slow release fertilizers such as osmocote might be more effective than fast acting fertilizers for Dendranthema coreanum (H.Lev. & Vaniot) Vorosch.