Development of Phytolamp and Study the Influence of LED Radiation on Tomatoes Growth

It is known that semiconductor light-emitting diodes (LEDs) based on various solid solutions are used as effective sources of radiation for supplemental illumination of plants. The study of the influence of LED radiation based on AlGaInP (660 nm and 730 nm) and full-spectrum (400 - 800 nm) phosphor "phyto-LEDs" (emission maxima at 440 nm and 660 nm) on the growth and development of tomato sprouts in the germination stage was made. The spectral and energy characteristics were measured and the density of the photosynthetic photon flux was calculated for each type of LED. Studies showed that irradiation of seeds with light with a maximum spectral luminescence characteristic of 660 nm increased germination by 4% compared to control samples and by 29% compared to samples germinated under phyto-LEDs. Irradiation with a combination of red (660 nm) and far red (730 nm) light in a ratio of light fluxes of 1: 1 decreased the results of germination of tomato seeds by 41% compared to the control batch.