In a one-year vegetation pot experiment we compared the effect of digestate from a biogas station and mineral fertilisers on yields of the total aboveground biomass and content of selected microelements: zinc (Zn), manganese (Mn), copper (Cu), iron (Fe) of silage maize, 'Atletico' variety. Five treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate during vegetation, 4) urea, triple superphosphate, KCl, MgSO4, 5) digestate before sowing. The nitrogen (N) rate was the same in treatments 2-5, 3.0 g N to pot. In treatment 4 the phosphorus (P), potassium (K) and magnesium (Mg) rates corresponded to those supplied in the digestate treatments (3 and 5). The dry matter weight of the total above ground biomass of one harvested plant (g) in treatments 1-5 was respectively as follows: 8.9 a; 27.1 c; 22.6 b; 33.0 d; 26.4 c (different letters indicate significant differences among treatments). The dry matter content of the aboveground biomass (%) for the respective treatments was as follows: 23.8 b; 24.7 b; 22.8 a; 22.7 a; 24.1 b. The content of micronutrients in the aboveground biomass fluctuated irregularly; however it was higher in all the fertilised treatments than in the control. It is true that the digestate (based on the date of application) yields were lower than the mineral fertiliser NPKMg (4) treatment; nonetheless applying digestates saves financial costs for the purchase of mineral fertilisers.