Veselina Badzhelova1, Roksana Mineva2 and Diyana Dermendzhieva2
1 Agricultural Academy, Institute of Roses, Essential and Medical Cultures, 6100 Kazanlak, Bulgaria
2 Trakia University, Faculty of Agriculture, 6000 Stara Zagora, Bulgaria
Badzhelova, V., Mineva, R. & Dermendzhieva, D. (2025). Influence of organic biostimulant “Atlas Universal” on economic indicators of Oil-bearing Rose (Rosa damascena Mill.). Bulg. J. Agric. Sci., 31(5), 924–932
The influence of the biostimulant “Atlas Universal” on the economic performance of the Bulgarian oil-bearing rose has been studied. “Atlas Universal” is obtained through the processing of sludge from urban wastewater treatment plants using an innovative zero-waste technology and contains a rich range of essential nutrients.
The application of the biostimulant improved the economic characteristics of the crop as well as its resistance to adverse climatic changes. Following its use, both flower yield and extracted rose oil increased in all tested variants, with the most significant improvement observed in those where it was applied in combination (both foliar and soil application). The best results were obtained in Variant I (foliar application at a dose of 2 L/ha and soil application at a dose of 50 L/ha), where the increase in flower yield was 27%, and in oil yield, it was 33% compared to the control plots.
Chemical analysis showed that the use of the biostimulant maintained the quality parameters of the essential oil within the standard for Bulgarian rose oil.