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The article presents experimental material obtained in the conditions of Mordovia on leached black soil on the effect of MEGAMIX liquid complex fertilizers and Albit growth regulator on photosynthesis production process and productivity of awnless brome. Two-factor field experiments were carried out on the crops of awnless brome on an experimental field at OAO “Mordoviyagosplem” in Ozerny village, urban district of Saransk in 2018 - 2020, according to the following scheme: Factor A - Time of application of liquid complex fertilizers and growth regulator. 1 - At the phase of spring growth, 2 - At the phase of stem elongation, 3 - At the phase of spring growth + in the phase of stem elongation. Factor B - Liquid complex fertilizers and growth regulator. 1. - Without application of liquid complex fertilizers and growth regulator (control). 2. - Megamix-pro. 3. - Megamix nitrogen. 4 - Albit. The results of our research indicate that leafiness of awnless brome prevailed (26.0 and 24.4%) when Megamix-pro and Megamix-nitrogen were used at the time of spring growth; predominant leaf area (47.8 thousand m2 / ha), photosynthetic potential (2.31 million m2 • days / ha), dry matter yield (8.75 t / ha) were formed with application of Megamix nitrogen at the time of spring growth; and net productivity of photosynthesis was the highest without application of these preparations (5.8 g / m2 per day) and with spraying the plants with Megamix-profi and Megamix-nitrogen (5.3 g / m2 per day) at the phase of stem elongation. Photosynthesis productivity was the lowest in case application of Megamix-profi and Megamix-nitrogen at the spring growth phase (224 and 228 g of seeds per 1,000 PhP units).

INFLUENCE OF LIQUID COMPLEX FERTILIZERS AND GROWTH REGULATOR ON PHOTOSYNTHETIC ACTIVITY AND PRODUCTIVITY OF AWNLESS BROME