Wplyw wieloletniego nawozenia azotowego na wartosc gospodarcza laki polozonej w Bieszczadach Zachodnich

Long-term experiments fertilization were carried out in 1987-1995 years period. In experiments the yield of DM and effectivity of nitrogen fertilizer were investigated. The doses of nitrogen fertilizers were 0, 80, - 160, 240 and 320 kg N/ha, phosphorus fertilizers 100 kg P₂O₅ per ha and potassium fertilizers 150 kg K₂O per ha. Among other things was investigated the effect of N-fertilization on the floristic composition of meadow sward. The experiments were localized on the six-years permanent meadows in Łukowe (400 meters above sea level). The yield of DM systematically increased, but only to the 240 kg N per ha. The best efficiency obtained at 80 and 160 kg N per ha. The nitrogen fertilization increased the share in floristic composition such species as Cocksfoot - Timothy and Annual meadow - grass. The participation of Meadow fescue in yields was very stable.