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INFLUENCE OF COMPLEX PHYSIOLOGICALLY ACTIVE SUBSTANCES ON THE PECULIARITIES OF PHOTOSYNTHETIC PRODUCTIVITY OF WINTER WHEAT PLANTS

Tikhon Simatin, Fedor Eroshenko, Irina Storchak

Abstract: Photosynthetic productivity is one of the most important factors determining the production process of plants. There is a direct connection between photosynthesis and crop yields, so the study of the characteristics of the photosynthetic activity of plants under the action of complex physiologically active substances is very important for understanding the mechanisms of their influence on yield formation. The aim of the research was to establish the features of the photosynthetic productivity of plants when using complex physiologically active substances in the technology of cultivation of winter wheat. The use of complex physiologically active substances in the technology of cultivation of winter wheat contributes to an increase in the relative content of chlorophyll. The best results in terms of the number of green pigments during vegetation on average were shown by Raykat Start (presowing treatment of seeds), both separately and in combination with other drugs (the excess compared to the control was 0.30-0.36 mg / g or 9.8 -11.8%). The most stable excess of chlorophyll content in plants at the end of the growing season is demonstrated by options using Nutrivant zernovoy (the excess is 80-100%). The use of complex physiologically active substances in winter wheat crops contributes to an increase in the chlorophyll photosynthetic potential by 2.4-27.6%, depending on the preparations, the time of their use and combinations with each other. Regardless of the organomineral substances used, the proportion of individual plant organs in the total photopotential is almost unchanged (leaves - 61.2-63.7%, stems - 25.4-28.1% and ears of corn - 9.9-10.7%). The use of complex physiologically active substances in the technology of cultivation of winter wheat against the background of an increase in the size of the assimilation apparatus can both increase its efficiency and reduce it. As a rule, the use of Raykat Start, both individually and in combination with other drugs, leads to a decrease in the net productivity of photosynthesis by 3.7-13.3%. At the same time, with the use of Nutrivant zernovoy NPP, it either does not decrease or increases by up to 5.2%. Keywords: winter wheat, complex physiologically active substances, yield, photosynthetic productivity, chlorophyll content, photosynthetic potential, net productivity of photosynthesis.

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