Considers the results of research conducted in 2021–2022 in the conditions of the southern agricultural zone of the Amur region (experimental field of the Far Eastern State Agrarian University) to study the effect of magnesium fertilizers on the dynamics of the content of essential and interchangeable amino acids of protein in soybean seeds. It was revealed that the application of magnesium fertilizers affects the content of these amino acids in soybean seeds. Field experiments on the effectiveness of the use of magnesium fertilizers "AgroMag Granulated" and "AgroMagActimax" in the cultivation of soybeans were held on meadow chernozem soil. The soybean variety of Umka, and magnesium fertilizers produced by LLC "Russian Mining and Chemical Society" were taken as the object of research. The use of "AgroMag Granulated" before sowing at a dose of 90 kg/ha and "AgroMagActimax" in the form of top dressing on a leaf at a dose of 5 l/ha affected the increase in lysine content – 6.8%. The increase in arginine and isoleucine content was influenced by the use of "AgroMagActimax" in the form of leaf dressing at a dose of 3 l/ha – 8.4 and 3.1%, respectively. The use of "AgroMagActimax" in the form of leaf dressing at a dose of 5 l/ha during vegetation contributed to a change in the content of histidine, leucine and threonine in the protein composition – 15.6, 10.1 and 4.5% respectively. The increase in the content of phenylalanine in the protein was influenced by the use of "AgroMag Granulated" before sowing at a dose of 30 kg/ha – 4.9%.

Kurkova Irina V., Fokin Sergey A., Tikhonchuk Pavel V., Shchegorets Olga V.

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