EN
The investigations were carried out under static fertilizer experiment conditions on a montane meadow. Unilateral fertilization with ammonium nitrate (N₁) and superphosphate (P) was applied. The effect of ammonium nitrate and urea in two doses 90 (N₁) and 180 (N₂) kg/ha was compared on the background of identical PK doses. After 18 years of fertilization there was a big increase in potential acidification which varied according to the form and dose of nitrogen. Thus, a half of each plot was limed with a dose equal to 0.5 of the value of soil hydrolytic acidity. Two species of grass dominated the initial sward: Nardus stricta and Festuca rubra. Unilateral fertilization with ammonium nitrate caused an increase in Nardus stricta share and decrease in Festuca rubra share. Grass growth at the object fully fertilized, particulary with ammonium nitrate (N₂) was dominated by Holcus mollis. Liming diminished the share of Nardus stricta in the sward and increased Festuca rubra, Festuca pratensis and Trifolium repens shares in the sward. However, it had no greater influence on Holcus mollis dynamics. The sward fertilized with urea had a greater utility value than fertilized with ammonium nitrate. Mineral fertilization had a slight effect on changes in the content of crude protein and protein, and N-NO₃. Liming decreased slightly the level of crude protein and stimulated protein synthesis in P and PK fertilizing objects. Liming dynamized soil compounds of potassium and magnesium, whereas an increase in Ca content in hay was highest at the objects fertilized unilaterally with N and P. Under such conditions, there occurred an improvement of Ca:P ratio, and also in K:Mg and K:(Ca+Mg) ratios. Liming increased the content of Ca, Mg, K and Mo in fodder and decreased the level of Mn and Zn.