Purpose. To determine the formation of soybean productivity depending on fertilization and inoculation.
Methods. Field, measurement, calculation-comparative, analysis, statistical.
Results. The results of the studies show that the yield of soybean seeds varied most from weather conditions and fertilization. Least from the use of inoculation. On average, over three years of research, the yield increased from 2.50 to 3.03 t/ha for the application of N30 and to 3.19 t/ha for the application of N60. The use of complete mineral fertilizer at a dose of N30P30K30 increased this indicator to 3.20 t/ha or by 6 %, and N60P60K60 – to 3.40 t/ha or by 7 % compared to nitrogen systems. The least yield increased from the use of phosphorus and potassium fertilizers. Variants with incomplete return of phosphorus and potassium fertilizers did not significantly reduce grain yield compared to complete mineral fertilizer. Similar to the yield of soybean seeds, protein yield changed depending on the studied factors. It should be noted that the advantage was given to the use of systems that included the application of 30 kg/ha of nitrogen fertilizers. When applying N30P30K30, the protein yield was 1177 kg/ha, and against the background of inoculation – 1390 kg/ha. The use of a double dose of mineral fertilizers did not significantly increase this indicator.
Conclusions. Soybean productivity depends significantly on the use of nitrogen fertilizers, the effectiveness of which varies depending on characteristics of weather conditions during the growing season. In fertilization system, the use of 30 kg/ha of nitrogen fertilizers is effective. Thus, in the more favorable 2023, the seed yield is 3.92 t/ha, and in the less favorable 2024 – 1.55 t/ha. Inoculation provides 0.04–0.63 t/ha of seed yield increase depending on weather conditions. The protein content increases from 36.1–39.2 % in the case without fertilizers to 36.2–39.8 % with the application of N30. The use of inoculation provides an increase in protein content to 37.5–39.8 %.
Key words
fertilization system, protein content, yield, protein collection, inoculation