Agriculture and forestry

Didur Ihor – Candidate of Agricultural Sciences, Associate Professor, leading researcher, Dean of the Faculty of Agronomy and Forestry of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3, didurihor@gmail.com).

Today, the situation on the global soybean market is quite favorable for increasing its production in our country. The growth of soybean production can be achieved only thanks to the introduction of highly profitable and competitive technologies for their cultivation, including the use of biologization factors. This article presents the economic efficiency and defines the main aspects of the optimization of the soybean fertilization system for the use of Groundfix soil biological fertilizer in combination with mineral fertilizers in the full rate and under the conditions of reducing their rate by 30%. The relevance and production necessity of carrying out such technological solutions and the search for optimal options for the maximum economic efficiency of growing modern soybean varieties have been proven, given the importance of this culture and the conditions that have developed today. A two-factor field experiment was conducted during 2017-2021 on the territory of the Agronomichne scientific research farm of VNAU, the soil of the experimental field is a gray forest medium loam. In the experiment, the maximum yield of 2.97 t/ha was recorded on the option with pre-sowing seed treatment with a mycorrhizal preparation and NPK (100%) + Groundfix 5 l/h fertilizer, while the profitability level was 117.4%. Reducing the rate of mineral fertilizers by 30% and applying Groundfix (3–5 l/ha) provided a level of production profitability that is higher than options with full mineral fertilizer. So, on the options without Micofrend application, from an economic point of view, the NPK option (70%) + Groundfix 5 l/ha was the most productive, while the level of profitability was 98.8%. And on the options with pre-sowing seed treatment with mycorrhizal drug NPK (70%) + Groundfix 3 l/ha and NPK (70%) + Groundfix 5 l/ha, the level of profitability was 119.4 and 125.0%, respectively.

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