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KMID : 0903619990400010112
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Journal of the Korean Society for Horticultural Science
1999 Volume.40 No. 1 p.112 ~ p.116
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Effects of Bed Structures on the Growth and Cut Flower Quality of Hydroponically Grown Chrysanthemum (Dendranthema grandiflorum Ramat. cv. Backwang)
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Abstract
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Effects of different bed structures and natural aeration on the growth and development of hydroponically grown chrysanthemum (Dendranthema grandiflorum Ramat. cv. Backwang) were investigated. Three types of bed structure, named B-1, B-2, and B-3 were compared with conventional one (control). Chrysanthemum growth was positively correlated with bed structure and aeration into rootzone. Differences in growth were observed throughout most of the growing period. Growth in conventional bed structure (control) and B-3 which were lined with plastic film within styrofoam bed decreased as compared to that in the B-1 and B-2, which were naturally aerated within substrate through drainage way and air hole. Growth characteristics in terms of leaf area, plant height, and stem length showed faster in B-2 bed structure than those in B-1 and B-3 structure. Rootzone temperature was higher up to 2 to 3℃ in the plot of B-1 and B-2 bed structure caused by the effect of air movement. Days to flowering were shortened in the plots of B-1 and B-2 structure caused by natural oxygen supply to rootzone. Modified bed structure which was named Biobed (B-2) was developed for natural supply of oxygen into rootzone. The result was favorable for the growth and development of hydroponically grown chrysanthemum (Dendranthema grandiflorum Ramat. cv. Backwang) using perlite medium.
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