Development of the Cycloadaptive Lighting Mode to Increase the Lactuca sativa L. Yield

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Abstract

In order to increase plant yield and reduce radiation sources energy consumption, we introduce the concept of the cycloadaptive photomode (CAPM), which adapts to the plant development substages (steps), dynamically changes lighting parameters to optimize their growth and development, and promotes increased photosynthetic pigments synthesis. Based on the results of assessing the spectral composition of LED devices effect on the Lactuca sativa L. development, it was determined that the light-emitting device based on the automated change in the spectral composition of radiation and the photosynthetic photon flux depending density on the stage of plant development in accordance with the cycloadaptive lighting mode leads to increase Lactuca sativa L. yield by 2 times, as well as a decrease in the amount of water used to form 1 g of dry matter by 2.5 times compared to natural lighting.

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About the authors

Maria M. Degtereva

LETI Saint Petersburg Electrotechnical University

Author for correspondence.
Email: mmromanovich@etu.ru
ORCID iD: 0000-0001-6797-0595

Assistant of the Department of Photonics

Russian Federation, Saint Petersburg

Evgeny V. Levin

LETI Saint Petersburg Electrotechnical University

Email: e_levin@etu.ru
ORCID iD: 0009-0000-3811-487X

2nd-Year Postgraduate Student

Russian Federation, Saint Petersburg

Alexander E. Degterev

LETI Saint Petersburg Electrotechnical University

Email: aedegterev@etu.ru
ORCID iD: 0000-0002-6151-6567

Assistant of the Department of Photonics

Russian Federation, Saint Petersburg

Ivan A. Lamkin

LETI Saint Petersburg Electrotechnical University

Email: ialamkin@etu.ru
ORCID iD: 0000-0002-3680-7725

Cand. of Sciences (Tech.), Associate Professor at the Department of Photonics

Russian Federation, Saint Petersburg

Sergey A. Tarasov

LETI Saint Petersburg Electrotechnical University

Email: satarasov@etu.ru
ORCID iD: 0000-0002-6321-0019

Dr. of Sciences (Tech.), Head of the Department of Photonics

Russian Federation, Saint Petersburg

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Supplementary files

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1. JATS XML
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2. Fig. 1. Volt-ampere (a), watt-ampere (b) characteristics and LED efficiency (c)

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3. Fig. 2. LED PPFD dependences on current at a distance of 19 cm (a) and on distance at operating currents (b)

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4. Fig. 3. PPFD distribution map on the irradiated surface at distances from the radiation source to the receiver of 19 cm (a), 40 cm (b), 60 cm (c)

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5. Fig. 4. Plant yield (a) and transpiration coefficient (b) of Lactuca sativa L. (Vyuga variety) on the 35th day of growth under different lighting modes (p < 0.05). Asterisks indicate the level of significance of differences in yield for different light sources and natural light (*p < 0.03; **p < 0.001)

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6. Fig. 5. Сhlorophyll a, chlorophyll b, total carotenoids сontent in Lactuca sativa L. samples on the 35th day (**p < 0.001)

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7. Fig. 6. Dependence of crop yield on the content of chlorophyll a (a), chlorophyll b (b) and carotenoids (c) in Lactuca sativa L.

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Copyright (c) 2025 Degtereva M.M., Levin E.V., Degterev A.E., Lamkin I.A., Tarasov S.A.