S.I. Supelnyak – Post-graduate Student, Department EIU4-KF, Kaluga branch of the Bauman MSTU E-mail: supelnyak@gmail.com

V.G. Kosushkin – Dr. Sc. (Eng.), Professor, Department EIU4-KF, Kaluga branch of the Bauman MSTU E-mail: kosushkin@gmail.com

S.A. Adarchin – Ph. D. (Eng.), Associate Professor, Department EIU4-KF, Kaluga branch of the Bauman MSTU E-mail: adarchin@rambler.ru

The aim of the work was to study the synergistic effect of LEDs of various spectral quality and the development of an adaptive LED lamp for plants. A prototype of an adaptive solid-state luminaire is being developed, which is designed to replace arched sodium tubular lamps (DNaT) used in greenhouses. The absorption spectrum of the leaf, depending on the age of the plant, was measured at several stages of vegetative growth using a spectrophotometer. The results of measurements are used for numerical modeling and optimization of the spectrum of plant illumination. Six types of LEDs with emission peaks of 440, 460, 530, 590, 630 and 660 nm were used in the device. The photon flux of the adaptive LED lamp was 218.45 μmol / s. Tests of an adaptive LED lamp were carried out when growing cucumbers of the hybrid Courage F1. For comparison, the cucumber seedlings were grown under the illumination of DNA (Reflax, Russia). The day / night temperature was 35° C, the humidity was 80% and a 14-hour photoperiod was maintained. As a result, it was shown that the radiation spectrum of an adaptive LED lamp provides an opportunity for effective control of plant growth in a greenhouse.

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