The study of the dynamics of the content of nutrients in the soil when growing crops

Krasnoyarsk Scientific Research Institute of Agriculture, a separate division of the Federal Research Center “Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences”, 66, Svobodny Ave., Krasnoyarsk, 660041, Russia

^* Corresponding author: aleksandr_bobrovski@mail.ru

Abstract

The study was conducted in the soil and climatic conditions of the Krasnoyarsk forest–steppe (station Minino) on leached chernozem. The scheme of the experiment with mineral fertilizers provided for the introduction of ammonium nitrate, ammophos and azophos in a dose of 80 kg / d.v.ha and the introduction of plant protection products. Soil samples for agrochemical analysis were selected in the phase of stalking, flowering and full ripeness. The content of nitrate nitrogen was carried out in accordance with GOST 26951-86, mobile compounds of phosphorus and potassium were determined by the Chirikov method (GOST 26204-91). The conducted studies have shown that the introduction of ammonium nitrate allowed to significantly increase the amount of nitrate nitrogen (up to 25.2 mg / kg) in the arable soil layer, in the control version, the level of nitrate nitrogen did not exceed 3.3 mg / kg during the growing season. In the soil of the experimental site, the content of mobile phosphorus varied from 16.4 to 29.7 mg/100 g. The introduction of ammophos did not significantly increase the phosphorus content in the arable horizon. The content of mobile potassium in the soil was high and varied from 10.0 to 17.5 mg/100 g of soil.