The Influence of Macro- and Micronutrient Fertilizers on the Productivity of Meadow Clover in the Conditions of the Upper Volga Region

Abstract

The research was carried out on the experimental field of the FSBEI of HE “Tver State Agricultural Academy” in 2019 and 2020. It was found that the application of pure microelement fertilizers Aquamix ST and Aquarin 5 allowed obtaining a statistically significant increase in the yield of green mass of meadow clover under favorable agro-climatic conditions on soils poor in microelements. The highest yield was noted on plots with clover treated with pure Aquarin 5 (57.90 t/ha) per cut. The use of Aquarin 5 increases the yield of clover by 22.20–48.80%, and in terms of mineral fertilizers in a full dose of N50P50K50 - by 4.80–24.30%. Small rates of mineral fertilizers N25P25K25 did not have a significant effect on the yield of clover, and an increase to N50 led to a negative result. The economic efficiency of the combined application of chelated and complex fertilizers is lower than the use of physiologically active substances in their pure form on soils poor in microelements.