Yield of winter and spring wheat depending on pre-sowing treatment and mineral nutrition

The experiment was planned for 2021 2023. Mikhailovsky district of the Volgograd region, on the territory of the peasant farm “Egorushin A.N.”, located in the southern black soil zone. The objects of study were the varieties of durum spring wheat: Donskaya Elegiya, Krasnokutka 13 and the varieties of winter durum wheat: Agat Donskoy and Aksinit with the treatment of seed material with biofertilizers and the introduction of mineral nutrition at yield levels. A three-year experiment led to the conclusion that biofertilizers (Blago + , Gumi 20) are actively absorbed by winter and spring wheat, making it possible to increase crop yields, while at the same time reducing application rates or completely abandoning traditional fertilizers. Among the winter varieties studied, the Aksnitit variety showed higher yields with a yield of 5.0-5.5 t/ha under the option of complex application of biofertilizers and pre-sowing treatment according to the Gumi 20+N 147 Р 55 К 90 scheme. Among spring wheat, the Donskaya Elegiya variety has proven itself better with a yield of 4.7 t/ha on the Gumi 20+N 147 Р 55 К 90 variant.