Influence of the protective-stimulating complexes on the morphometric indicators of narrow-leaved lupine in the conditions of the Vologda Region in 2023

The article examines the influence of the protective-stimulating complexes on vegetative biomass yield and seed productivity of narrow-leaved lupine, the Ladny variety. We experimentally evaluated the results of treating the vegetating plants with solutions of the bioregulators Floravit®-3P and Ekofus at various concentrations. The highest increase in the aboveground biomass yield, including stems and leaves (18.93 g averagely per one plant in air-dry state – over 40.2 t/ha), was achieved using Ekofus at a concentration of 0.5 %, which is by 26 % higher than the control value. Application of Ekofus also increased the seed productivity by 33–45 % compared to the control. The biostimulant Floravit®-3P had an ambiguous effect on narrow-leaved lupine plants in the Vologda Region in 2023. Its application in a 0.01 % concentration during the vegetation period produced a 34 % decrease in green mass yield compared to the control. By the comprehensive analysis results, the bioregulator Ekofus is highly efficient in increasing both aboveground biomass and seed production of narrow-leaved lupine, confirming its suitability for use in agronomic practices.