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http://dx.doi.org/10.5338/KJEA.2021.40.4.31

Effects of Light-Quality Control on the Plant Growth in a Plant Factory System of Artificial Light Type  

Heo, Jeong-Wook (Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development of Administration)
Baek, Jeong-Hyun (Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development of Administration)
Publication Information
Korean Journal of Environmental Agriculture / v.40, no.4, 2021 , pp. 270-278 More about this Journal
Abstract
BACKGROUND: Horticultural plant growth under field and/or greenhouse conditions is affected by the climate changes (e.g., temperature, humidity, and rainfall). Therefore investigation of hydroponics on field horticultural crops is necessary for year-round production of the plants regardless of external environment changes under plant factory system with artificial light sources. METHODS AND RESULTS: Common sage (Salvia plebeia), nasturtium (Tropaeolum majus), and hooker chive (Allium hookeri) plants were hydroponically culturing in the plant factory with blue-red-white LEDs (Light-Emitting Diodes) and fluorescent lights (FLs). Leaf numbers of common sage under mixture LED and FL treatments were 134% and 98% greater, respectively than those in the greenhouse condition. In hooker chives, unfolded leaf numbers were 35% greater under the artificial lights and leaf elongation was inhibited by the conventional sunlight compared to the artificial light treatments. Absorption pattern of NO3-N composition in hydroponic solution was not affected by the different light qualities. CONCLUSION(S): Plant factory system with different light qualities could be applied for fresh-leaf production of common sage, nasturtium, and hooker chive plants culturing under field and/or greenhouse. Controlled light qualities in the system resulted in significantly higher hydroponic growth of the plants comparing to conventional greenhouse condition in present.
Keywords
Environmental control; Hydroponics; Mixture radiation; Year-round production;
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