Zmiana zawartości białka ogólnego i włókna surowego w zależności od poziomu nawożenia i fazy rozwojowej traw

The experiment was conducted in 2008–2010 in the mountain area. Cumulation of protein and crude fiber were assesed in four grasses: Festuca pratensis, Dactylis glomerata, Phleum pratense, Arrhenatherum elatius. The experience was two-factor. The first factor was varied nitrogen (50, 100, 150 kg ha–1) with constant phosphorus-potassium fertilization. The second factor was the phonological stage – first was at the earing, second – during flowering. Results of assesment shows that Festuca pratensis and Arrhenatherum elatius increased the protein content in plants and reduced the aging process with increasing nitrogen fertilization. In mountain conditions the optimal dose of nitrogen Phleum pratense seems to be 100 kg ha–1 while for Dactylis glomerata best dose was 150 kg.