Salad Crop Production Under Different Wavelengths of Red Light-emitting Diodes (LEDs) 2001-01-2422
Light-emitting diodes (LEDs) represent an innovative artificial lighting source with several appealing features specific for supporting plants, whether on space-based transit vehicles or planetary life support systems. Appropriate combinations of red and blue LEDs have great potential for use as a light source to drive photosynthesis due to the ability to tailor irradiance output near the peak absorption regions of chlorophyll. This paper describes the importance of far-red radiation and blue light associated with narrow-spectrum LED light emission. In instances where plants were grown under lighting sources in which the ratio of blue light (400–500 nm) relative to far-red light (700–800 nm) was low, there was a distinct leaf stretching or broadening response. This photomorphogenic response sanctioned those canopies as a whole to reach earlier critical leaf area indexes (LAI) as opposed to plants grown under lighting regimes with higher blue:far-red ratios. In many instances, the salad crops grown under LEDs were just as productive as crops grown under broad-spectrum light, largely as a consequence of more efficient light interception during early growth.
Citation: Goins, G., Ruffe, L., Cranston, N., Yorio, N. et al., "Salad Crop Production Under Different Wavelengths of Red Light-emitting Diodes (LEDs)," SAE Technical Paper 2001-01-2422, 2001, https://doi.org/10.4271/2001-01-2422. Download Citation
Author(s):
Gregory D. Goins, Lisa M. Ruffe, Nathan A. Cranston, Neil C. Yorio, Raymond M. Wheeler, John C. Sager
Affiliated:
Dynamac Corporation, Kennedy Space Center, NASA KSC Spaceport Engineering and Technology
Pages: 11
Event:
31st International Conference On Environmental Systems
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Light emitting diodes (LEDs)
Life support systems
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