ISHS Acta Horticulturae 620: XXVI International Horticultural Congress: Asian Plants with Unique Horticultural Potential: Genetic Resources, Cultural Practices, and Utilization
FORCING OF CAMPANULA MEDIUM CHAMPION CULTIVARS |
| Authors: | J.S. Song, C.S. Bang, Y.D. Chang, H.T. Jang, J.S. Lee |
| Keywords: | potted plants, nutrition, plant growth regulators, temperature, high intensity irradiance |
| Abstract:
The effect of temperature, light, nutrition, and plant growth regulators on growth and flowering of Campanula medium F1 hybrids, ‘Champion Blue’ and ‘Champion Pink’ was investigated. Flowering was not affected by 4 weeks of temperature treatment when given to 6-week old seedlings (stage I) in both cultivars. Flowering of ‘Champion Blue’ was accelerated by HID-HPS light. Flowering was accelerated and plant height was reduced in both cultivars when grown at 14/12° C. The number of bottom breaks was increased to 9.8 and the number of total flowers was increased to 17.0 when young seedlings received 200 mg L-1 N from 15-7.1-9.7 liquid fertilizer. However, flowering was delayed and the percentage of flowering plants was reduced by 20 percent as compared to the control. Twenty ml of 5 mg•L-1 ancymidol reduced the height of plants and delayed flowering as compared to control plants. These effects were more pronounced when younger plants under a vegetative growth were treated as compared to developed plants with several florets formed. Campanula F1 hybrid ‘Champion Blue’ and ‘Champion Pink’ did not need cold treatment and could be grown as short stemmed cut flower, medium tall bedding plants, as well as potted plants. | |
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