Influence of cultivar and fertilization treatment on bioactive content of some apple (Malus domestica Borkh.) cultivars

The paper presents the chemical composition of fruits three apple cultivars (Jonagold Decosta, Red Idared and Gala Schnitzer Schniga) fertilized with treatment: T$_{1}$ (control-without fertilization); T$_{2}$ (300 kg/ha NPK (6:18:36) + 150 N (calcium ammonium nitrate-CAN)) T3 (foliar nutrition-mixture organic-mineral fertilizer commercially named 'FitoFert Kristal' (0.6%) (10:40:10) (20:20:20) 'FoliFetril Ca' (0.5%) (N:Ca) in Bosnia Herzegovina during two years (2020-2021). Significant differences contents soluble solids, total sugars, inverted sucrose, phenolic content, content flavonoids antioxidant activity were found among cultivar/treatment combinations, cultivars, treatments years. Differences acids not statistically significant, but significant combinations found. sugars sucrose highest cultivar Jonagold while acids, phenolics, cultivar. fertilization treatment T2 significantly influenced phenolic, fruits. According to results obtained, we can say that do have much effect on bioactive ingredients, exception content. Among mineral elements, four macroelements represented present large amounts: potassium (K) (1266.15 mg kg$^{-1}$ 1652.89 kg$^{-1}$), calcium (Ca) (122.76-474.90 phosphor (P) (86.14-124.84 kg$^{-1}$) magnesium (Mg) (57.36-70.68 kg$^{-1}$). On other hand, microelements determined: boron (B) (1.06-14.25 kg$^{-1}$); iron (Fe) (2.79-4.62 manganese (Mn) (0.27-0.46 zinc (Zn) (0.15-0.48 Results showed been strongly affected by