Investigated the effect of agroecological factors on the photosynthetic activity of crops of winter triticale. It was found that the maximum photosynthetic activity of triticale crops, including accumulation of dry matter in Polesie, forest-steppe transition zone – Polesie, Steppe accounted for VII and VIII of the stages of organogenesis. Photosynthetic activity of triticale crops significantly determine the conditions of ecotypes (r = 0.66, p ≥ 0.05), sowing time and doses of fertilizers...