Abstract
The article calculates potentially effective for photobiological processes density light fluxes arc tube sodium lamps (HPS) and 250 watt Light Emitting Diode (LED) lamps 46 watts. The concept of light utilization for photobiological reactions is proposed to evaluate the energy component of the light spectrum suitable for optimal activation of plant photoreceptor systems that control the shaping process by changing the orientation of the biological system in space at an early stage of development in order to achieve maximum photosynthetic response. The calculations used the experimentally obtained values of the absorption coefficients of the leaf ofCucumis sativus L. Based on the data on the linear dimensions of the leaf of the plant and the dependence of the absorption spectrum on the age of the plant, as well as the action spectra of photobiological reactions (photosynthesis, dissipation of excess energy as heat, phototropic reaction, chlorophyll, photomorphogenesis) and emission spectra of light sources, we have calculated the mass of accumulated carbohydrates at an early stage of developmentCucumis sativus L. In order to test the reliability methods of analytical evaluation, an experimental study of the effect of radiation data illuminators was carried out. For HPS 250, the weight of carbohydrates and the dry weight of the plant were0.24 g and0.20 g, respectively, for LED 46, the weight of carbohydrates and dry weight of the plant were0.05 g and0.05 g, respectively. The proposed system for assessing the efficiency of the spectrum and the intensity of radiation by the linear parameters of a plant is an intelligent basis for creating an energy-efficient system for automatically controlling LED lighting of a greenhouse with feedback on a measured parameter of a plant.
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