employee from 01.01.1973 to 01.01.2025
Krasnoyarsk State Agrarian University (Soil Science and Agrochemistry, docent)
employee from 01.01.1995 to 01.01.2026
Krasnoyarsk, Krasnoyarsk, Russian Federation
employee from 01.01.1999 to 01.01.2026
Krasnoyarsk, Krasnoyarsk, Russian Federation
student from 01.01.2022 to 01.01.2026
Krasnoyarsk
VAK Russia 4.1.2
VAK Russia 4.1.3
VAK Russia 4.1.4
VAK Russia 4.1.5
VAK Russia 4.2.1
VAK Russia 4.2.2
VAK Russia 4.2.3
VAK Russia 4.2.4
VAK Russia 4.2.5
VAK Russia 4.3.3
VAK Russia 4.3.5
UDC 631.416
UDC 631.81
The purpose of the work is to evaluate the orientation of the transformation processes of nitrogen–containing compounds of agrochernozems under the conditions of using complex mineral fertilizers. The study of mineralization and immobilization processes was carried out at the experimental field of the UNPC Borsky, in typical conditions of the Krasnoyarsk forest-steppe. Object of research: spotting of agro-chernozems of clay-illuvial typical medium-depth and agrochernozems of cryogenic-micellar medium-depth on yellow-brown carbonate clay. In the field experiment, the effects of the following mineral fertilizers were studied: ammophos, sulfoammophos, nitroammophoska and phosphoric flour together with ammonium sulfate. Their effect on the dynamics of the conversion of nitrate and ammonia nitrogen compounds in agrochernozems, as well as the level of its immobilization, was studied. The nitrogen content in the microbial biomass indicated the predominance of immobilization processes in the soil. The precursor culture and hydrothermal conditions have a statistically significant effect on the concentration of mineral compounds. In soybean and winter rye crops, an increase in temperature negatively affected the processes of nitrate accumulation, while the opposite effect was observed in the corn agrocenosis. Soybean plant residues had a statistically significant effect on the increase in ammonium nitrogen content. A significant change in the direction of nitrogen mineralization and immobilization processes was determined by the technology of corn cultivation. The C : N ratio in the soil was a factor that formed the level of nitrogen content in the mineral and microbial-absorbed form only in certain phases of the ontogenesis of the studied agricultural crops. This influence was multidirectional. Negative correlations were revealed between the nitrogen content of microbial biomass and the productivity of winter rye and cucumbers (r = –0.7), which indicated the existing competition between phytocenoses and the living phase of the soil for mineral nitrogen.
types and doses of mineral fertilizers, dynamics of ammonium, nitrate, and microbial biomass nitrogen content, mineralization-immobilization processes, and C : N ratio in soil
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