Journal of Biosystems Engineering
- Volume 24 Issue 2
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- Pages.115-122
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- 1999
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- 1738-1266(pISSN)
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- 2234-1862(eISSN)
Plant Growth and Morphogenesis Control in Transplant Production System using Light-emitting Diodes(LEDs) as Artificial Light Source - Spectral Characteristics and Light Intensity of LEDs -
인공광원으로 발광다이오우드를 이용한 묘생산 시스템에서 식물생장 및 형태형성 제어 - 발광다이오우드의 분광 특성 및 광강도 -
Abstract
Because of their small mass, volume, solid state construction and long life, light-emitting diodes(LEDs) hold promises as a lighting source for intensive plant production system. Spectral characteristics and light intensity of LEDs were tested to investigate their feasibility as artificial lighting sources for growth and morphogenesis control in transplant production system. Blue, green, and red LEDs had a peak-emission wavelength at 442nm, 522nm, and 673nm, respectively. Their half width defined as the difference between upper and lower wavelength in the intensity equivalent to 50% of the maximum intensity showed 26nm, 41nm, and 74nm, respectively. Photosynthetic photon flux(PPE) at the distance of 9cm under the LEDs array was measured as
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