THE EFFECTIVENESS OF THE USE OF ORGANOMINERAL AMINOVELL FERTILIZER ON SUNFLOWER CROPS IN THE SOIL AND CLIMATIC CONDITIONS OF THE REPUBLIC OF TATARSTAN

Abstract

The research was carried out in order to determine the biological effectiveness of organomineral fertilizer of Aminovella on sunflower crops in the soil and climatic conditions of the Republic of Tatarstan. Field experiments were conducted in 2020-2021. The soil of the experimental site is typical gray forest, the content of humus (according to Tyurin) is 3.0%, mobile phosphorus and potassium (according to Kirsanov) is 160 mg/kg and 145 mg/kg of soil, respectively. The reaction of the soil solution is close to neutral (pH 6.6). In the experiment, a hybrid of sunflower Svetlanv was grown. The scheme of the experiment provided for the following options: control (background NPK); background NPK + Aminovell brand: Stimwell Set, 2.0 l/ha; background NPK + Aminovell brand: Stimwell Set, 2.5 l/ha; background NPK + Aminovell brand: Stimwell Set, 3.0 l/ha. The first foliar top dressing of plants was carried out in the phase of 4-6 leaves, the 2nd - 15 days after the last top dressing. Top dressing of sunflower with organomineral fertilizer of Aminovella in the phase of 4-6 pairs of real leaves enhanced the linear growth of the root system, which occupies 46.8-50.6 cm of the active soil layer against 41.4 cm at the control (without top dressing). Depending on the consumption rates, the height of plants increases from 152 cm at the control to 180 cm at the last experiment (2-fold top dressing with a consumption rate of 3 l/ha). The crude fat content decreases significantly as the yield of the greenhouse increases (from 50.7% in the control to 46.3% in the last version of the experiment). In connection with this "dilution effect", the gross harvest of vegetable oil in the variant with the rate of consumption of the drug 3 l / ha (1472 kg / ha) is inferior to the variant with the rate of consumption of the drug 2.5 l / ha (1541 kg / ha).