The effect of the intensity of nitrogen fertilization and of some ecological factors on the chemical composition of grassland

Vojtko, J.

Vedecke Prace Vyskumneho Ustavu Luk a Pasienkov v Banskej Bystrici 10: 11-22


Accession: 000772774

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Natural grassland on N.- and S.-facing aspects at 2 sites (alt. 600 and 800 m) at Nemecka in 1970-2 was given no fertilizer, 32 kg P + 100 kg K/ha, or PK + 120, 240 or 480 kg N/ha; the N was applied in 4 equal split dressings and 4 cuts/yr were taken. Total N contents of herbage DM were increased by PK and further by increased rates of N up to 17.27% at alt. 600 m and 19.43% at 800 m, were higher at 800 than at 600 m, and tended to be lower on N.-facing than on S.-facing slopes. Av. 1970-1 herbage DM contents of P and K were increased and those of Ca were decreased by increase in applied NPK.