The effect of nitrogen fertilizer on the productivity of Cynosuretum cristati type meadows on the Sjenica-Pester plateau [Serbia (Serbia and Montenegro)]
2004
Vuckovic, S.(Poljoprivredni fakultet, Beograd - Zemun (Serbia and Montenegro)) | Simic, A. | Cupina, B. | Stojanovic, I. | Stanisavljevic, R. | Vojin, S. | Dubljevic, R.
Natural meadows occupy large areas in hilly mountainous regions in Serbia. The investigation was carried out on the Sjenica-Pester plateau on a natural Cynosuretum cristati type meadow, at a place called Vrujci, which is 1158 m above sea level. The test were performed in plots of 4 square meter in four replicas. The investigation made with five nitrogen fertilization rates (0, 40, 80, 120 and 160 kg/ha). The yields were determined by weighing the green mass, while that of hay was determined by means of the drying factor. The obtained data indicate that nitrogen fertilizer had a favourable effect on increasing the yield. The maximum yield of hay was obtained in the test with 160 kg/ha nitrogen, amounting to 4.93 t/ha for two years, which was an increase of 2.26 t/ha or 85.0% over the control. However, it was observed that the effect of this, the highest dose of nitrogen fertilizer varied from year to year, depending primarily on the amount of precipitation during vegetation. Although the total yield of hay per unit area was less in the dried year, the percentage above the control was higher in the dry year than in the wet year. The maximum yield of hay was obtained in the test with 160 kg/ha nitrogen, since it produced only 14.1 kg of hay per kg of nitrogen, while in tests with lower dose (40 kg/ha) this ratio was higher (35.5 kg).
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