OPTIMIZATION OF THE SOYBEAN FERTILIZATION SYSTEM BASED ON THE USE OF PREPARATIONS OF BIOLOGICAL ORIGIN
Abstract
Objective. The aim of our study was to study the effectof pre-sowing seed treatment with an inoculant in combinationwith modern biological preparations based on phosphorus-potassium mobilizing and mycorrhizal bacteria onthe formation of individual plant productivity and soybeangrain yield.Methods. Field research was conducted during2024–2025 on the experimental field of the Research andDevelopment Group "Agronomichne" of the UkrainianNational Academy of Agricultural Sciences in the village ofAgronomichne. The tillage technology was traditional for theForest-Steppe zone of Ukraine, the area of the registeredexperimental plot was 40 m², the total area was 25 m². Thefactorial design of the experiment included a 2:4 combination,which amounted to 8 test variants (the total number ofplots in four repetitions was 32). The variants were placedsystematically, with four repetitions of each.Results. According to the results of field research,it was found that on gray forest soils of the Right-BankForest-Steppe, biological preparations that were theobject of research significantly affected the growth anddevelopment of soybean plants and the formation of theirgrain productivity. Studies have confirmed the positiveeffect of the combined use of inoculant, mycorrhiza andsoil biofertilizer, which contributed to the improvementof individual crop productivity, while in the Artemis andMonroe varieties the number of beans per plant was 41.9and 39.3 pcs, respectively, and the mass of seeds fromone plant was 10.3–11.8 g. In the control (Monroe variety),the mass of 1000 grains was 126.7 g, while in the Artemisvariety – 123.8 g. Combinatorial treatment of seeds withthe composition Bioinoculant-BTU + Mycofriend on thebackground of the soil biofertilizer Groundfix Extremeensured an increase in these indicators to 132.4 and129.2 g, respectively. The complex use of the preparationsBioinoculant-BTU (3 l/t of seeds), Mycofriend (1.5 l/tof seeds) and Groundfix Extreme (4 l/ha during pre-sowingcultivation) ensured the formation of the highest yieldin the experiment of 4.03 t/ha for the Monroe variety and3.86 t/ha for the Artemis variety, which exceeded the controlby 17.8–18.2 %, respectively.Conclusions. A positive effect was established fromthe combination of the preparations Bioinoculant-BTU,Mycofriend together with the application of the soil biofertilizerGroundfix, while the maximum number of beans perplant was recorded: 41.9 pcs./plant in the Artemida varietyand 39.3 pcs./plant in the Monroe variety. The largest seedmass from one plant was also noted, which was 10.3–11.8 g.The complex use of the preparations Bioinoculant-BTU(3 l/t of seeds), Mycofriend (1.5 l/t of seeds) and GroundfixExtreme (4 l/ha during pre-sowing cultivation) made it possibleto achieve the highest grain yield: 4.03 t/ha for theMonroe variety and 3.86 t/ha for the Artemis variety.
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