ISHS Acta Horticulturae 580: IV International ISHS Symposium on Artificial Lighting
CHARACTERISTICS OF GROWTH AND FLOWERING ON SOME BEDDING PLANTS GROWN IN MIXING FLUORESCENT TUBE AND LIGHT-EMITTING DIODE |
| Authors: | J. Heo, C. Lee, K. Paek |
| Keywords: | artificial light, light quality, photoreceptor, photosynthetic photon flux |
| Abstract:
The objective of this experiment was to investigate characteristics of growth and flowering of Ageratum, Marigold, and Salvia bedding plants grown in mixing light conditions with fluorescent tubes and blue, red, and far-red Light-Emitting Diodes. Ageratum (cv. Blue Field), Marigold (cv. Orange Boy), and Salvia (cv. Red Vista) plants that developed two true leaves were grown for 70 days in a growth chamber, where air temperature and relative humidity were maintained at 25°C and 60%, respectively. The experiment had four treatments with different mixing lights: Fluorescent lamp (FL), FL+Blue LED (FLB), FL+Red LED (FLR), and FL+Far-red LED (FLFr). Photosynthetic photon flux on the culture shelf was kept at 90 mmol m-2 s-1 in all treatments, and 16-h photoperiod was provided. The results have shown that the total dry weight per plant of Ageratum seedlings was not significantly different in FLB, FLR, and FLFr treatments. The plant height per plant of Ageratum and Marigold was not significantly different between FL and FLR treatments, and was the longest in FLFr treatment. The number of flowers in Marigold plants was not significantly different in all treatments, eventhough no blooming was observed for the FLFr treatment. The number of stomata of Marigold seedlings was greater in FLR and FLFr than in FL. | |
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