半導体レーザー光がサラダナ生育に及ぼす影響

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タイトル別名
  • Effect of Laser-diode Light on Growth of Lactuca sativa L.
  • ハンドウタイ レーザーコウ ガ サラダナ セイイク ニ オヨボス エイキョウ

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Development of an effective, high-power, low-cost, artificial light source for use in plant-growing facilities would be very beneficial for plant production.<BR>Recently, the laser-diode lamp has been proposed as a new type of light source for plant production. The advantages of the laser-diode lamp over conventional light sources are its high electrical-to-optical power conversion efficiency, low thermal radiation, easy set-up for high power and pulse irradiation, small weight and small volume for mounting, and selectivity for proper wavelength.<BR>Because laser light itself differs from the light sources presently used in plant growing, we confirmed the possibility of growing plants under the laser-diode light by growing lettuce <BR>(Lactuca sativa L.) plants.Lettuce seedlings with 5-6 leaves were grown under a laser-diode lamp panel with 30 pieces of high-power and high-efficiency AlGaInP laser-diodes. The power of each laser-diode lamp was 500 mW, and the wavelength was 680 nm, which was efficient for photosynthesis.<BR>The lettuce plants were able to grow under the laser-diode light. However, the weight of the lettuce plants grown under the laser-diode lamps was light, and their leaves were long and thin compared to those of lettuce plants grown under high-pressure sodium lamps.

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