作为植物照明光源的发光二极管:肯尼迪航天中心研究综述。

Hyeon-Hye Kim, Raymond M Wheeler, John C Sager, Neil C Yorio, Gregory D Goins
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引用次数: 61

摘要

提供充足的光照是支持植物在太空中长期生长的基本要求。在这方面,已经测试了几种为植物提供辐射能的电灯,包括荧光灯、高压钠灯和金属卤化物灯。这些灯的光谱质量各不相同,可能导致植物生长和形态的差异。目前用于太空植物培养的照明研究主要集中在创新的照明技术上,这些技术具有较高的电气效率,并能减少质量和体积。考虑用于太空的照明技术包括发光二极管(LED)。红光和蓝光发光二极管的组合已被证明是几种作物的有效光源,但在红光和蓝光的照射下,植物的外观呈紫灰色,很难目测植物的健康状况。额外的绿光会使植物叶片呈现绿色和正常状态,类似于白光下的自然环境,还能给工作人员带来心理上的好处。与在冷白荧光灯下生长的植物相比,在红光和蓝光 LED 中添加 24% 的绿光(500-600 纳米)可促进莴苣植物的生长。巧合的是,这些在额外绿光下生长的植物还具有绿色外观的额外美感。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Light-emitting diodes as an illumination source for plants: a review of research at Kennedy Space Center.

The provision of sufficient light is a fundamental requirement to support long-term plant growth in space. Several types of electric lamps have been tested to provide radiant energy for plants in this regard, including fluorescent, high-pressure sodium, and metal halide lamps. These lamps vary in terms of spectral quality, which can result in differences in plant growth and morphology. Current lighting research for space-based plant culture is focused on innovative lighting technologies that demonstrate high electrical efficiency and reduced mass and volume. Among the lighting technologies considered for space are light-emitting diodes (LEDs). The combination of red and blue LEDs has proven to be an effective lighting source for several crops, yet the appearance of plants under red and blue lighting is purplish gray, making visual assessment of plant health difficult. Additional green light would make the plant leaves appear green and normal, similar to a natural setting under white light, and may also offer psychological benefits for the crew. The addition of 24% green light (500-600 nm) to red and blue LEDs enhanced the growth of lettuce plants compared with plants grown under cool white fluorescent lamps. Coincidentally, these plants grown under additional green light would have the additional aesthetic appeal of a green appearance.

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