Knizhka T. Fotoactivating of nourishing solution for hydroponic plant-growers.

. The thesis decided to relevant scientific and practical tasks is to establish patterns of dose of ultraviolet radiation on the properties of the nutrient solution to improve the performance of hydroponic cultivation technology in vegetable production greenhouses. The dependencies change bioelectric potentials and pH of nutrient solution on the wavelength of radiation and radiation exposure. Experimentally confirmed that the most effective radiation with a wavelength in the range 250...380 nm at a flow rate of irradiated solution 0.125...0.32 m/s, irradiation time - 20...40 s and the energy dose of radiation - 320...160 mJ/cm2, which helped justify the technological regimes fotoaktyvation. Set to the actual dose bactericidal radiation received by nutrient solution for fotoaktyvation. For irradiation time 20...40 s on the surface of the solution provided dose 44...88 mJ/cm2, subject to the bactericidal disinfection technologies nutrient solution, which is minimal dose of 40 mJ/cm2. The results of production tests and determined the economic efficiency of electro-complex activation of nutrient solution.