Influence of beneficial soil microorganisms and mineral fertilizers enriched with them on the flowering, fruiting, and physical and chemical parameters of the fruit of three-year-old strawberry plants in field cultivation

The excessive use of chemicals in plant production, including mineral fertilizers has a harmful effect on the morpho- and physiological state strawberry plants, their yielding, physicochemical properties fruit soil. Increasing effectiveness beneficial microorganisms, i.e. filamentous fungi, arbuscular mycorrhizal fungi (AMF) bacteria, is an essential method reducing amount used to fertilize aim study was assess soil microorganisms (filamentous bacteria) applied alone or together with ‘Marmolada’ physico-chemical fruit. experiment included application (Aspergillus niger Purpureocillium lilacinum), bacteria (Bacillus sp., Bacillus amyloliquefaciens Paenibacillus polymyxa) (Polifoska 6, Urea, Super Fos Dar 40). investigated number inflorescences flowers, intensity green colour leaves, yield weight (g %), pH, extract (°Brix), titratable acidity (g/100 g), firmness (N), as well concentrations macro-and microelements leaves plants. obtained results depend type fertilizer its concentration. Strains bacterial strains only (without fertilizer), increase by 60 35%, respectively. Reduced 60% doses Polifoska 40 combined influence more beneficially than standard (100%). enriched mean 25–30%. Both 6 at 100% positively affect physical chemical fruits. reduced nitrogen potassium contents Urea magnesium content leaves. Application NPK influences iron calcium decreases due fertilization.