THE INFLUENCE OF BIOLOGICAL PREPARATIONS ON THE STRUCTURAL ELEMENTS OF CORN YIELD

Abstract

The field experiment was conducted in 2024 at the Krakės Agricultural Company of the Kėdainiai district, in contact with the Kėdainiai district. The soil of the experimental field is light loamy, deeper carbonate, shallow gleyic brown loam (Endocalcari-Epihypogleyic Cambisol). A single-factor field experiment was conducted, which investigated the influence of fertilization with biological preparations and their combinations on the green mass and biomass yield of corn, plants.

During the field experiment, it was found that the use of biological preparations in the BBCH 13–14 growth stage significantly increased corn productivity compared to the control variant (P < 0.05). The highest total aboveground dry matter corn yield (24 t ha^-1), total cob (grain, kernels, bracts) yield (15.9 t ha^-1) and grain yield (12.7 t ha^-1) (B5) 15% suspension of humic and fulvic acids, pH 4–5 (5.0 l ha-1) + (H5) – consisting of photosynthetic bacteria, yeast microorganisms, lactic bacteria, nitrogen-fixing, phosphorus-releasing and potassium-mobilizing bacteria (5.0 l ha-1). No significant differences were found between the use of the combination of these biological preparations B5+H5 and the use of the preparation Ferbanat L (2.0 l ha^-1). In the case of the use of this preparation, corn productivity indicators were slightly lower. A non-significant (P > 0.05) trend towards an increase in the number of grains per cob was observed when using biological preparations and their combinations.