The effect of the application of solid granular fertilizer - Ammonium nitrate on the productivity and brewing qualities of two-row barley variety Emon was studied. The experiment was carried out at the experimental fields at the Agricultural University of Plovdiv, Bulgaria during the period 2023-2025. The nitrogen fertilization rates were 0, 40, 80, 120 kg/ha active substance nitrogen. The experiment was carried out using the block method with mixed variants of four replications. The single experimental plot was 18 sq.m. Ammonium nitrate was used in early spring as a top dressing in the tillering phase, against the background of a pre-sowing application of 50 kg/ha of active substance phosphorus (as triple superphosphate). The predecessor of the crop was sunflower. It is clearly noticeable that in the experimental year 2024. the highest extraction of Nitrogen, Phosphorus and Potassium was observed in the fertilizer variant with 80kg/ha Nitrogen, in 2025. these indicators were highest in the fertilizer variant with 120kg/ha Nitrogen. In terms of the consumption of Nitrogen, Phosphorus and Potassium in both experimental years, the highest costs were found in the fertilizer variant with 120 kg/ha of Nitrogen. The total import and export of Nitrogen, Phosphorus and Potassium in 2024 is highest for import at 80kg/ha Nitrogen – 306.5kg/ha, export at 120kg/ha Nitrogen – 74.6 per 1 ton of grain. In 2025. the highest for import and export is the variant with 120kg/ha – 387.8 kg/ha for import and 73.3 kg per ton of grain export, respectively.

Nutrients uptake and expense, barley

agronomy

Presentation: poster