Research of the Influence of Pulsed Radiation of the Blue and Red Ranges of the Spectrum on the Growth of Lactuca Sativa L

Currently, artificial lighting based on LEDs is an urgent task in the field of artificial lighting in the agricultural sector. An electrical circuit and a phytolamp have been developed, which operates in pulsed mode with LEDs with wavelengths of 445 and 660 nm. The spectral and energy characteristics of the LEDs were measured, and the photosynthetic flux density for these LEDs was calculated. Using 2 different pulse modes, the dependence of Lactuca sativa L. germination was obtained, as well as the dependence at GOST-12038-84. The use of a pulse mode with a ratio of 75% blue radiation and 25% red radiation, compared with other ratios, in an experimentally created phytolamp allowed to increase the germination energy up to 1.8 times, the leaf area up to 1.5 times.