Using different ratios of red and blue LEDs to improve the growth of strawberry plants
Red and blue light emitting diodes (LEDs) are known to be effective for enhancing plant growth. The aim of this study was to evaluate the growth of strawberry plants under different red:blue light ratios from LEDs compared with high pressure sodium lamps (HPS). In this study, three ratios of red (661 nm) to blue (449 nm) LED light (5:1, 10:1 and 19:1) were applied and HPS was used as a control. Strawberry plants cultured under different ratios of red to blue LEDs showed higher plant height, leaf, runner, inflorescence and crown number, fresh mass, and dry mass accumulation than that of plants cultured under HPS. The significantly higher fresh and dry mass accumulation were observed for strawberry plants cultured under 10:1 and 19:1 ratio of red to blue LEDs than HPS. The treatment 19:1 ratio of red to blue LED was significantly higher in inflorescences number and crown number than the other treatments. These results indicate that inflorescence production of strawberry plants is promoted by a higher level of red to blue light.
Naznin, M.T., Lefsrud, M., Gravel, V. and Hao, X. (2016). Using different ratios of red and blue LEDs to improve the growth of strawberry plants. Acta Hortic. 1134, 125-130
Fragaria × ananassa, high pressure sodium lamps, inflorescence number, light emitting diodes