THE EFFECT OF FERTILIZERS CONTAINING SULFUR ON THE YIELD AND QUALITY OF SOYBEAN GRAIN IN THE CONDITIONS OF THE KURSK REGION
2022
Lazarev, V.I. | Minchenko, Zh.N. | Trutaeva, N.N. | Voronchikhin, V.V.
The results of the studies conducted in 2019-2021 indicate the high efficiency of various grades of mineral fertilizers containing sulfur (NPS (22-15-7), NPS (20-20-14) and NPKS (19-16-8-3) in soybean cultivation on chernozem soils of the Kursk region with an average level of availability of mobile sulfur (3.5-4.5 mg/kg). It was found that the application of mineral fertilizer of the NPS brand (22-15-7) at a dose of N44P30S14 for pre-sowing cultivation increased the yield of soybeans by 0.76 t/ha or 37.8%, the protein content in the grain by 1.7%, fat by 0.5% compared with the control. The efficiency of using mineral fertilizers of the NPS brand (20-20-14) at a dose of N30P30S21 together with ammonium nitrate at a dose of N14 for pre-sowing cultivation was lower: soybean yield in this variant increased by 0.56 t/ha or by 27.8%, protein content in grain - by 1.8%, fat by 0.6%. The highest yield, protein and fat content in soybean grain was ensured by the introduction of a complex mineral fertilizer of the NPKS brand (19-16-8-3) at a dose of N36P30S6 together with ammonium nitrate at a dose of N8 for pre-sowing cultivation: 2.99 t/ha, 38.7% and 22.3%, respectively. The use of mineral fertilizers containing sulfur in the cultivation of soybeans was economically advantageous. The efficiency of their use was expressed by the level of profitability equal to 173.8-210.7% and mainly depended on the cost of fertilizers themselves.
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