Light & Engineering 32 (2) 2024
Volume 32
Date of publication 04/24/2024
Pages 70–77
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Photo-biological Effectiveness of PAR for Radish Plant Communities Irradiated Using an LED Source with an Adjustable Spectrum L&E, Vol.32, No.2, 2024
Articles authors:
Alexander A. Tikhomirov, Maxim S. Molokeev, Vladimir V. Velichko
Alexander A. Tikhomirov, Dr. of Biology Sciences, Professor. In 1970, he graduated from Krasnoyarsk State University by speciality in physics and qualification of biophysicist and physicist. At present, he works in the Biophysics Institute of the Siberian branch of Russian Academy of Sciences, head of the Phototroph Biosynthesis Control Laboratory, Head of the Closed Ecosystems sub-department of the Reshetnyov Siberian State University of Science and Technology. His research interests: phytoactinometry, light physiology of plants, closed ecosystems
Maxim S. Molokeev, Ph. D. of Physical and Mathematical Sciences. In 2004, he completed his studies at the M.F. Reshetnev Siberian Aerospace University with a degree in physics and continued his postgraduate studies at the Institute of Physics SB RAS. In 2007, he was awarded the academic degree of Ph. D. of Physical and Mathematical Sciences in specialty 01.04.07 – condensed matter physics. From 2008 to the present, he has been working at the Institute of Physics SB RAS, as a senior researcher. From the beginning of 2017 to the present, he has been an Associate Professor at the Siberian Federal University. Research interests: crystallography, luminescence, solid state physics
Vladimir V. Velichko, Ph. D. in Biological Sc. In 2004, graduated from Krasnoyarsk State University with the major in Plant Physiology and Biochemistry. Works at the Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences. Senior researcher of the Laboratory of Controlled Biosynthesis of Phototrophic Organisms. Research interests: photosynthesis and productivity of higher plants as phototrophic compartment of artificial ecosystems, effect of light conditions and mineral nutrition on growth and development of higher plants
Abstract:
The aim of the current study was to find the most effective spectral modes of irradiation of short-season plants (for example, radish) using a fluorescent LED irradiator with a variable spectrum. The research methodology was based on the species-specific response of plants to the spectral composition of light. Photo-biological experiments were carried out to find effective spectral composition of PAR for cultivating radish communities under stable and variable irradiation modes of electrical lighting. It was shown that under stable irradiation modes, the highest productivity of economically useful radish biomass had been achieved at spectral composition with a maximum of 60 % radiation in the (600–700) nm region in a variable spectral irradiation mode. The variable spectral irradiation mode turned out to be the most effective when the spectral composition with the dominance of red rays was changed to the spectral composition with the dominance of blue rays. There were no significant differences between the best production parameters for stable and variable modes of irradiation of radish plants, which indicates the expediency of choosing the stable spectral mode of irradiation of radish plants as a short-season crop under electrical illumination. The results obtained can be used to select spectral irradiation modes for short-season plants grown under electrical lighting in northern regions and in isolated rooms in various climatic zones using “City-farm” technologies.
References:
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