Studies to study the contamination of agricultural landscapes with heavy metals were carried out in Ulyanovsk region. The materials for the research were soils, plants and snow cover, sampling of which was carried out near highways in different directions and distances (5 km, 10 km and 15 km) from the city of Ulyanovsk. In the east direction from the city, a pattern of increasing the content of Zn, Cu, Pb, Cd, Ni in the soil (gross and mobile form), plants and snow cover was traced. In soil samples, Zn was the most mobile, the amount of which (mobile form) varied from 7.0 to 10.7 mg/kg, the content of mobile compounds Cu, Pb, Cd, Ni did not change significantly. In 5 km (east of Ulyanovsk), the maximum values for the content of heavy metals in plants were found for Zn – 27.8 mg/kg; Cu – 18.9 mg/kg; Pb – 0.62 mg/kg; Cd – 0.30 mg/kg, Ni – 0.87mg/kg of dry matter, there was no excess of MDU it was established in none of the observation sites. A direct dependence of the cadmium content in plants on its content in soils was noted, with an increase in the content in the soil (5.9 mg/kg), its content in plants increased to 0.30 mg/kg. The content of Zn, Cu, Ni at all snow collection points is significantly lower than the MPC. The excess of the MPC was recorded at almost all sampling points in terms of Pb and Cd content by 2.0...7.0 times.

An experiment to study the effect of plant growth regulators Biotran and Energia M on spring wheat yield was carried out in Ulyanovsk region at the experimental site of Ulyanovsk Research Institute of Agriculture - a branch of the Samsra Scientific Center of the Russian Academy of Sciences in 2019-2021. The influence of the studied preparations on the yield data and quality indicators of spring wheat grain was studied. It was established that the use of growth regulators studied in the experiment had a positive effect on the grain yield and its quality. The effective doses of the studied preparations were determined. The following were used in the experiment: growth stimulants - Energy M (standard), Biotran and a complex mineral fertilizer (Azofoska at a dose of 15 kg AI). Spring wheat cultivar Simbirtsit was sown as the studied crop. The soil of the experimental plot is represented by leached, heavy loamy chernozem. The scheme of the experiment involved the study of the following options: mineral fertilizers (factor A) - without fertilizers (0), azophoska during sowing (N15P15K15); growth regulators for pre-sowing treatment of seeds and single treatment of vegetative plants (factor B) - without treatment (0), Energy M (standard) 4 g/t + 10.0 g/ha, Biotran 5 g/t + 5.0 g/ha ha, Biotran 5 g/t + 10.0 g/ha. Pre-sowing treatment of seeds was carried out manually by the method of semidry dressing the day before sowing, with dosages recommended by the manufacturer. Spraying was carried out manually with a knapsack sprayer during the budding phase of spring wheat. The results of the research found that the increase in spring wheat yield was the largest in the variant with the use of the Biotran growth regulator at a dosage of 5 g/t (presowing seed treatment) + 10 g/ha (spraying) in all years of the experiment. On average, for three years in this variant, the yield was 1.85 t/ha against the background without the use of fertilizers and 1.94 t/ha against the fertilized background. Under the influence of the studied growth regulators, the technological and biochemical parameters of grain improved: the protein content in the grain increased by 0.3-1.4%, gluten by 0.2-1.9%, nature by 1-12 g/l.