Efficiency of application of integrated mineral fertilizers in soybean agrocenosis

Soybean is one of the most valuable protein crops on the modern market of agricultural producers and its production has been constantly growing in recent decades. The level of its productivity, as well as any other crop, depends on the biological productivity potential of the cultivated variety and the degree of implementation of its cultivation techniques. The aim of the research was to study the responses of soybean Glycine max (L.) Merr. Zusha varieties for various mineral nutrition in the conditions of agrocenosis. The research was conducted on the basis of the research and educational production center "Integration" of the Orel State Agrarian University named after N.V. Parakhin. We determined the biological efficiency of fertilizer systems, the productivity and quality of grain under different mineral nutrition conditions .Testing of liquid complex fertilizers on soy has shown high biological and economic efficiency of mineral fertilizers. In conditions of dark gray forest soils with average agrochemical indicators of the soil, as well as with spontaneous inoculation of soybean by native rhizobia strains, the maximum economic effect was demonstrated with the pre-sowing application of complex mineral fertilizer NPK (S)+Ca 5:15:30(5)+7 in a dose of 150 kg/ha and 20 kg/ha of urea, as well as diammofoski NPK(S) 10:26:26 (2) in conjunction with the ZhCU. The use of mineral fertilizers contributed to an increase in the growth of biomass by an average of 23%, and the area of leaves-by 8.5% compared to the control. Changes in mineral nutrition led to an increase in the content of raw protein in soy grains. Additionally, 4.4-4.6 C/ha of grain was obtained from 1 ha, respectively 4.7 and 5.4 thousand rubles of income due to an increase in soybean productivity by 22-23% compared to the control.