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KMID : 0903619980390010092
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Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 1 p.92 ~ p.97
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Effect of Air Filled Porosity of Rooting Media on Rooting and Growth of Chrysanthemum Cuttings
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김기선/Kim, Ki Sun
오욱/유용권/Oh, Wook/Yoo, Young Kweon
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Abstract
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To investigate the effects of rooting media composition and air filled porosity of the media on rooting and growth of cuttings in Derutranthema grandiflorum (Ramat.) Kitamura, cuttings of ´Shuhouno-chikara´ (called as ´Subangryeock´ in Korea) and ´Orlando´ were inserted within perlite (PL), vermiculite (VM), peatmoss (PT), soil (SO), and their mixtures. At 20 days after cutting, coarse PL and PL 3 : PT 1 (v/v; PL3+PT1) were favorable in root formation, increasing the length and dry weight of roots. However, VM, PT, and PL+VM were not effective on rooting and stem elongation. At 20 days after cutting, media with high air filled porosity (AFP), such as PL (68.6%) and PL3+PT1 (57.2%), contributed to increase in root dry weight and decrease in T/R ratio, while media with low AFP, such as vermiculite (38%), PT (31.6%), and PL1+PT3 (37.5%) resulted in poor root growth. Root dry weight had a positive correlation with AFP of rooting media in both cultivars (r₂=0.97, 0.89). The results in this study indicate that media with high AFP may increase the diffusion of oxygen from the air to the cutting´s stem surface, consequently in improving the adventitious root formation.
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