2012•AgroSpace (University of Belgrade, Faculty of Agriculture)Requires access
Herbage yield and botanical composition of Italian ryegrass forage crops associated with different types of nitrogen supply.
Aleksandar Simić, S. Vučković, Sanja Vasiljević, Z. Bijelić, Ž. Tomić, Violeta Mandić, Hakan Geren, P. Golin ́ski, M. Warda, P. Stypin ́ski
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Abstract
Italian ryegrass monoculture and mixtures with red clover (sowing ratios 75:25%, 50:50% and 25:75%) were established in the spring of 2008 at the Institute for Animal Husbandry, Belgrade, with the aim to analyse the possibilities of managing the N supply. There were four N rates for Italian ryegrass monoculture: 0, 100, 150 and 200 kg ha(-1), whilst no N fertilizer was applied to the mixture plots. The trial was carried out during 2008-2010 and the highest total DM yield was obtained with 200 kg N ha(-1), similar to that of the ryegrass-clover mixtures. Ryegrass contributed less to the total yield in the mixtures, because it had lower ratios in the structure of swards than those used at sowing. An Italian ryegrass-red clover sward may have advantages over a pure Italian ryegrass sward fertilized by high rates of N, providing high yield with a more sustainable land-use system.