Changes of crude protein content in Italian ryegrass influenced by spring nitrogen application
2009
Simic, A., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Vuckovic, S., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Kresovic, M., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Vrbnicanin, S., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Bozic, D., Faculty of Agriculture, Belgrade - Zemun (Serbia)
During a three-year field experiment with Italian ryegrass forage in the first production year, a dynamics of crude protein content under the influence of different levels of spring nitrogen application was examined. Crude protein content decreased from stem elongation to flowering, but the changes had different intensity among years and treatments. The highest crude protein content during stem elongation was obtained using the highest nitrogen rate - 150 kg/ha, even 100% higher than control treatment in 2006 and 2007. Differences among treatments decreased prior flowering, and all treatments hay yield was equable per year. The highest hay yield was reached in 2007, and it was influenced by spring nitrogen rates.
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