Light & Engineering 30 (3)

Volume 30
Date of publication 06/06/2022
Pages 101–106

Testbed for Studying the Efficiency of Plants Photosynthetic Irradiation Based on Measuring Carbon Dioxide Concentration in the Air L&E, Vol.30, No.3, 2022

Articles authors:

Alexander B. Myshonkov, Olga E. Zheleznikova, Sergey V. Prytkov, Denis A. Terekhin

Alexander B. Myshonkov, Ph.D., Associate Professor of the Department of Lighting Engineering Institute of Electronics and Lighting Engineering at National Research Ogarev Mordovia State University. In 2005, he graduated from the Lighting Engineering Faculty of FSBEI HE National Research Ogarev Mordovia State University. His research interests: LED lighting devices, intelligent lighting control systems, photosynthetic irradiation of plants

Olga E. Zheleznikova, Ph.D., Associate Professor. She graduated from the Lighting Engineering Faculty of FSBEI HE National Research Ogarev Mordovia State University in 1989. At present, she is the Head of the Light and Engineering Department of FSBEI HE National Research Ogarev Mordovia State University and Honoured Worker of Higher Education of the Republic of Mordovia

Sergey V. Prytkov, Ph. D. Tech. Sciences. He graduated in 2010 from N.P. Ogarev Mordovia State University. At present, he is researcher at the Testing Laboratory for Electric Lamps and Lighting Products of the VNIIIS A.N. Lodygina and Associate Professor of the Department of Lighting Engineering of the Institute of Electronics and Lighting Engineering of Mordovia State University. His research interests: metrology of optical radiation, development of metrological complexes for measuring photometric, colorimetric characteristics of visible radiation, radiometric and effective values of UV radiation, lighting engineering calculation

Denis A. Terekhin, Master student of the Department of Electronics and Nanoelectronics at the Institute of Electronics and Lighting Engineering, National Research Mordovian State University. In 2020, he graduated from the National Research Mordovian State University. His scientific interests: LED lighting devices, intelligent lighting control systems, photosynthetic irradiation of plants

Abstract:

The work is devoted to the description of a testbed that allows studying the efficiency of photosynthetic irradiation of plants by measuring the level of carbon dioxide concentration in the air, which in turn determines the intensity of photosynthetic processes in plants. This method makes it possible to significantly increase the speed of comparative research of the effect of irradiation modes on crop yields. The developed testbed is based on the ESP8266 microcontroller with sensors for measuring carbon dioxide concentration, temperature, air humidity, and a microcontroller implementing the control of plant irradiation modes. Measurement of carbon dioxide concentration was carried out using the MH-Z16 sensor, the principle of which is based on the measurement of non-dispersive infrared radiation (NDIR). In the testbed LED irradiators with a continuous emission spectrum and LED irradiators with a combined emission spectrum (white light + “red” radiation) were used. The testbed allowed us to study the dependence of the efficiency of photosynthesis on the conditions of irradiation by varying the spectral composition of radiation, irradiance intensity. The measurement of carbon dioxide concentration in the phytotron showed its significant dependence on the irradiation conditions. Since the rate of change in the concentration of carbon dioxide occurs over a sufficiently long period of time, research into the irradiation efficiency was carried out on the basis of an assessment of the dynamics of carbon dioxide concentration. Another variant of the research was the consistent comparison of changes in the concentration of carbon dioxide under different irradiation conditions.

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Keywords

DOI: https://doi.org/10.33383/2022-025

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