PHOTOSYNTHESIS AND PRODUCTIVITY OF POTATO PLANTS IN THE CONDITIONS OF DIFFERENT SPECTRAL IRRADIATION (150,00 руб.)

UDK 635.21:581.132:581.174.1:535-1/-3 PHOTOSYNTHESIS AND PRODUCTIVITY OF POTATO PLANTS 1 All-Russia Research and Development Institute of Agricultural Biotechnology, RAAS, Moscow 127422, Russia e-mail: yumart@yandex.ru IN THE CONDITIONS OF DIFFERENT SPECTRAL IRRADIATION Yu. <...> Ts. Martirosyan1, M.N. Polyakova1, T.A. Dilovarova1, A.A. Kosobryukhov1, 2 2 Institute of Fundamental Problems in Biology, RAS, Pushchino 142290, Moscow province, Russia e-mail: kosobr@rambler.ru Received April 9, 2012 S u m m a r y The authors investigated the effect of light-emitting diode irradiator with maximum in the region of red (λmax 6305 nm, 6605 nm) and blue (λmax 4505 nm, 4705 nm) light on growth processes and activity of photosynthetic apparatus in potato plants of the Nevskii early variety. <...> It was made a conclusion, that application of light-emitting diode irradiators in controllable conditions of phytotron may be useful technique during potato growing subject to changes of spectrum composition in plant ontogenesis. <...> In natural conditions of plant vegetation, daylight provides illumination of quite variable intensity and spectral composition. <...> Controlled environment with adjustable lightning allows setting the parameters required by a plan of experiment and provide an optimum light program for improved efficiency of plant growth. <...> Photoculture commonly uses different types of electric lamps (1). <...> For plants it is essential that light must include all visible spectral regions with prevailing red, green, blue, and violet rays, as well as a small proportion of ultraviolet and infrared light. <...> Currently, the most widely used lamps are high-pressure gas-discharge lamps – metal-halide lamps (MHL, maximum emission at 450 nm) and high-pressure sodium lamps (HPS, maximum emission at 590 nm) of 400 and 600 W (1, 2). <...> However, using gas-discharge lamps in plant growing is associated with significant energy expenditure and insufficient spectral properties of light emitters. <...> A possible solution of this problem is low-energy light-emitting diodes (LEDs). <...> LEDs can be used as supplement light sources, though they are expected to completely replace traditional lamps in photoculture (3, 4), especially in enclosed cultivation systems. <...> Today <...>