关键词: 植物工厂, LED光源, 光环境, 光质生物学, 光质

Abstract: Plant factory is an inevitable developmental trend and the advanced stage of protected horticulture worldwide. Its essential advantage lies in all production factors, including artificial lighting can be intelligently controlled. As an ideal light source for plant factory, LED can provide all wavelengths of physiologically active radiation, thus enriching the connotation of photo-biology. Research and application of LED hasten the ramification of photo-biology. Plant factory is an ideal place and facility type for studies and application of plant photo-biology. Studies on plant photo-biology, regulation and control of LED light environment are of important application value for improving yield and quality of plant products produced by plant factory. The sustainable development of LED plant factory industry awaits for further revelation of photo-biology. This paper summarized the definition, connotation of plant photo-biology of plant factory with LED light; highlighted the substitution sufficiency and necessity for full spectrum by red plus blue light, ratio optimization of red light to blue light, continuous light by red blue light, UV-LED biology and circadian rhythms, etc. key research direction and new situation for research and application at home and abroad. Before ending, the paper pointed out the emphasis of R&D and application of plant photo-biology for future LED plant factory.

Key words: plant factory, LED light source, light environment, photo-biology, light quality