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.

中文翻译：

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白光 LED 光谱对人工照明植物工厂草莓移植生产力的影响

由于具有高质量和全年移植生产的能力，最近引入了具有人工照明的植物工厂 (PFAL) 用于生产草莓移植物 (S-PFAL)。为了通过该系统实现更高的效率，必须选择具有适合转轮植物繁殖光谱的光源。本研究旨在研究与白色荧光灯相比具有不同相关色温的白色发光二极管 (LED) 的光谱对草莓 (Fragaria × ananassa Duch. cv. cv. Maehyang) 在 PFAL 中繁殖和转轮植物。将每个带有一个固定转轮的均匀繁殖体放入 PFAL 中进行移植生产，并在暖白光 LED (WWL)、薄荷白 LED (MWL)、或冷白荧光灯 (CWF) 21 天。MWL处理组的繁殖体在各处理中具有最大的叶数、叶面积、顶/根干重比和每个繁殖体新形成的转轮数。MWL 处理后每个繁殖体新形成的赛跑的干重也最大，而 CWF 处理后最低。然而，三个处理之间转轮植物的生长参数没有显着差异。WWL和MWL的光合光子效率为5.40 µmol s- 1 W- 1，比CWF（3.38 µmol s- 1 W- 1）高62.6%。MWL、WWL 和 CWF 处理的干重效率分别为 23.5、22.1 和 10.0 g kWh-1。