Effects of Red/Blue Light Ratio with Different Light Intensity on Growth and Yield of Cherry Radish

doi:10.3969/j.issn.1000-6362.2018.03.003

Abstract

Abstract:

Two light quality treatments of various red/blue light ratios (1R:1B and 2R:1B) and three light intensity (180, 240, 300μmol·m^-2·s^-1) treatments were designed to investigate the effects of red/blue light ratio and light intensity on growth and yield of cherry radish grown in environmentally-controlled chamber with LED light source. The results showed that light quality of 2R:1B presented higher new leafy chlorophyll content and lower shoot fresh weight than 1R:1B when cherry radish grown under 180μmol·m^-2·s^-1. But there were no significant differences in other growth indices between two red/blue light ratio treatments. 2R:1B treatment significantly improved new leafy chlorophyll content, fresh and dry weight of shoot and root, root diameter, root volume and root to shoot ratio compared with 1R:1B under 240μmol·m^-2·s^-1. When light intensity was 300μmol·m^-2·s^-1, 2R:1B treatment had slightly lower new leafy chlorophyll content and slightly higher fresh and dry weight of shoot. Under the same red/blue light ratio, the new leafy chlorophyll content, root diameter and fresh, dry weight of root increased with the increment in light intensity. The variation of shoot fresh and dry weight with light intensity depend on light quality. To conclude, suitable light quality and light intensity level are basis for high-efficient production of cherry radish, and appropriate red/blue light ratio could improve the growth of cherry radish significantly when light intensity above a certain value.

Key words: Plant factory with artificial light, LED, Light environment, Root vegetable, Biomass

ZHA Ling-yan, LIU Wen-ke. Effects of Red/Blue Light Ratio with Different Light Intensity on Growth and Yield of Cherry Radish[J]. Chinese Journal of Agrometeorology, 2018, 39(03): 162-167.

References

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