Effect of the light spectrum of white LEDs on the productivity of strawberry transplants in a plant factory with artific
- PDF / 984,426 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 77 Downloads / 183 Views
RESEARCH REPORT
Effect of the light spectrum of white LEDs on the productivity of strawberry transplants in a plant factory with artificial lighting Hyein Lee1 · Seon Woo Park2 · Minh Duy Pham1 · Hyunseung Hwang1 · Changhoo Chun1,3 Received: 4 June 2020 / Revised: 23 June 2020 / Accepted: 3 August 2020 © Korean Society for Horticultural Science 2020
Abstract The application of plant factory with artificial lighting (PFAL) for producing strawberry transplants (S-PFAL) was recently introduced due to the capacity for high quality and year-round transplant production. To achieve greater efficiency with this system, it is essential to select lighting sources that have a suitable spectrum for runner plant propagation. This study was conducted to investigate the effects of the light spectrum of white light-emitting diodes (LEDs), which have a different correlated color temperature compared with that of white fluorescent lamps, on the growth of strawberry (Fragaria × ananassa Duch. cv. Maehyang) propagules and runner plants in a PFAL. Uniform propagules with one fixed runner each were placed into a PFAL for transplant production and were grown under either warm-white LEDs (WWL), mint-white LEDs (MWL), or cool-white fluorescent lamps (CWF) for 21 days. The propagules in the MWL treatment group had the greatest number of leaves, leaf area, top/root dry weight ratio and number of newly formed runners per propagule among the treatments. The dry weight of the newly formed runners of each propagule was also greatest after MWL treatment, whereas it was lowest after CWF treatment. However, there was no significant difference in the growth parameters of the runner plants among the three treatments. The photosynthetic photon efficacy 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 efficacies of the MWL, WWL, and CWF treatments were 23.5, 22.1, and 10.0 g kWh− 1, respectively. These results indicate that MWL with high photosynthetic photon efficacy can have positive effects on the runner formation and growth of strawberry propagules and can replace cool-white fluorescent lamps in an S-PFAL. Keywords Artificial lighting sources · Correlated color temperature · Color rendering index · Light quality · Propagation rate · Propagules
1 Introduction Most commercial strawberry (Fragaria × ananassa Duch.) cultivars are octoploids that have complex genomic structures (Darrow 1966), and it is practically impossible to maintain strawberry cultivars by seed propagation; thus, Communicated by Jun Gu Lee, Ph.D. * Changhoo Chun [email protected] 1
Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul 08826, Korea
2
Indoor Farm and Protected Horticulture Laboratory, Farm8 Co., Ltd., Pyeongtaek 17706, Korea
3
Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
vegetative propagation is used for variety maintenance. Among the various strawberry vegetative propagation methods, plug tran
Data Loading...
