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Height Control of Pot Chrysanthemum according to Daminozide Applications at Different Planting Period in C-Channel mat Irrigation System  

Kang, Seung Won (Department of Applied Plant Science, Chung-Ang University)
Seo, Sang Gyu (Natural Science Research Institute, University of Seoul)
Lee, Gung Pyo (Department of Applied Plant Science, Chung-Ang University)
Pak, Chun Ho (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University)
Publication Information
FLOWER RESEARCH JOURNAL / v.19, no.1, 2011 , pp. 30-36 More about this Journal
Abstract
Effect of daminozide concentration and application methods, in combination with different planting period, on the growth of chrysanthemum was investigated for small pot-plant production. Daminozide, a plant growth regulator widely used for plant height control, was applied by drench or sub-application. For pot chrysanthemums of first planting time, plant height was reduced over $4,000mg{\cdot}L^{-1}$, when daminozide was drenched directly into the pot medium. However, $5,000mg{\cdot}L^{-1}$ of daminozide drench affected plant height reduction for secondarily planted pot chrysanthemum. Analysis of variance revealed the plant height was affected by planting time. For sub-application experiment of daminozide, it showed that the daminozide affected the number of flower buds formation and fresh and dry weight. These results suggest that planting period affected growth retardation of chrysanthemum. Therefore, application of growth retardant in combination with planting time and application methods may provide more efficient growth control for pot-chrysanthemum production.
Keywords
drench; plant growth regulator; sub-application;
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