Home > International Symposium on Advanced Technologies and Management for Innovative Greenhouses: GreenSys2019 > High green light proportion in mixed red and blue lights enhanced production of water spinach in plant factory

Articles

High green light proportion in mixed red and blue lights enhanced production of water spinach in plant factory

Article number

1296_87

Pages

683 – 690

Language

English

Abstract

Light is one of the most essential environmental factors that affect plant growth and development.
Selection of suitable light source is important for plant production in artificial lighting plant factories.
In our previous research, we found that the growth and secondary metabolites accumulation of water spinach were significantly affected by monochromatic lights.
However, mixed light quality for water spinach production is still poorly understood.
Therefore, this study aimed to clarify appropriate light quality for water spinach production and its ascorbic acid and total phenolics contents under mixed red and blue light with different proportions of green light.
Four different spectra of LED light (RB; RBG1, RBG2, and RBG3 ratio of 79:21, 70:18:12, 57:16:27, and 30:28:42, respectively) were used in a commercialized plant factory.
Results show that stem, leaf and shoot fresh weights and leaf area were the highest under RBG3 treatment, followed by RBG1, RBG2 treatments and were the lowest under RB light treatment.
On the contrast, the highest ascorbic acid content in stem was achieved in RBG2 followed by RBG3, RBG1, and RB. These results suggest that high green light ratio enhanced production of water spinach based on mixed red and blue light spectra.

Publication

International Symposium on Advanced Technologies and Management for Innovative Greenhouses: GreenSys2019

Authors

M. Kitayama, D.T.P. Nguyen, N. Lu, M. Takagaki

Keywords

ascorbic acid, closed-type plant production system, LEDs, ratios, total phenolics

Full text

https://doi.org/10.17660/ActaHortic.2020.1296.87

Groups involved

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