Effect of the light spectrum of white LEDs on the productivity of strawberry transplants in a plant factory with artifi cial lighting

• Published in: Horticulture, environment and biotechnology 2020, Environment, and Biotechnology, 61(6), , pp.971-980
• Main Authors: Hyein Lee, Seon Woo Park, Minh Duy Pham, Hyunseung Hwang, Changhoo Chun
• Format: Article
• Language: English
• Subjects: 농학
• ISSN: 2211-3452; 2211-3460
• DOI: 10.1007/s13580-020-00284-0

The application of plant factory with artifi cial lighting (PFAL) for producing strawberry transplants (S-PFAL) was recentlyintroduced due to the capacity for high quality and year-round transplant production. To achieve greater effi ciency with thissystem, it is essential to select lighting sources that have a suitable spectrum for runner plant propagation. This study wasconducted to investigate the eff ects of the light spectrum of white light-emitting diodes (LEDs), which have a diff erent correlatedcolor temperature compared with that of white fl uorescent lamps, on the growth of strawberry ( Fragaria × ananassaDuch. cv. Maehyang) propagules and runner plants in a PFAL. Uniform propagules with one fi xed runner each were placedinto a PFAL for transplant production and were grown under either warm-white LEDs (WWL), mint-white LEDs (MWL),or cool-white fl uorescent lamps (CWF) for 21 days. The propagules in the MWL treatment group had the greatest numberof leaves, leaf area, top/root dry weight ratio and number of newly formed runners per propagule among the treatments. Thedry weight of the newly formed runners of each propagule was also greatest after MWL treatment, whereas it was lowestafter CWF treatment. However, there was no signifi cant diff erence in the growth parameters of the runner plants amongthe three treatments. The photosynthetic photon effi cacy of WWL and MWL was 5.40 μmol s − 1 W − 1 , which was 62.6%higher than that of CWF (3.38 μmol s − 1 W − 1 ). The dry weight effi cacies of the MWL, WWL, and CWF treatments were23.5, 22.1, and 10.0 g kWh − 1 , respectively. These results indicate that MWL with high photosynthetic photon effi cacy canhave positive eff ects on the runner formation and growth of strawberry propagules and can replace cool-white fl uorescentlamps in an S-PFAL. KCI Citation Count: 0