Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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The Effects of Artificial Light Sources on Lettuce Seedling Vigor and Growth

  • Hyeon-Do Kim (Department of Horticulture Bioscience, Pusan National University) ;
  • Yeon-Ju Choi (Department of Horticulture Bioscience, Pusan National University) ;
  • Eun-Young Bae (Department of Horticulture Bioscience, Pusan National University) ;
  • Byoung-Il Je (Department of Horticulture Bioscience, Pusan National University) ;
  • Jum-Soon Kang (Department of Horticulture Bioscience, Pusan National University)
  • Received : 2024.03.12
  • Accepted : 2024.05.02
  • Published : 2024.05.31
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Abstract

The aim of this study was to investigate the effects of artificial light sources on the germination and seedling vigor of lettuce, aiming to identify the optimal artificial light source for producing high-quality seedlings. Lettuce cultivar of 'Tomalin' and 'Seonpunggold' exhibited the highest seed emergence in the Metal halide(MH) lamp and High-pressure sodium(HPS) lamp treatment group, while the emergence rate parameter, T50, was the fastest in the HPS lamp treatment group. Both cultivars showed good growth characteristics such as number of leaves, root length, and stem diameter under RGB-LED, and their seedling vigor was excellent as well. The plant height was smallest in the Red + Green + Blue LED treatment, but the leaves were round and thick, resulting in higher biomass and dry weight. Single light sources of Red LED and Blue LED led to reduced growth compared with that under the mixed light treatments. Chlorophyll content in lettuce varied with the type of artificial light, with both cultivars exhibiting the highest chlorophyll content in the Red + Green + Blue LED treatment. The most suitable artificial light for lettuce seedling growth was the Red + Green + Blue LED treatment.

Keywords

Acknowledgement

This work was supported by a 2 year research grant of Pusan National University.

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