A Note on Urea versus Calcium Ammonium Nitrate for Winter Wheat

摘要: Urea and calcium ammonium nitrate (CAN; 275 g N/kg) were compared as sources of N for winter wheat in field experiments at a total nine sites over 3-year period. The rates used 0, 50, 100, 150, 200 kg/ha it was applied two splits. mean yield 4.04 t/ha the ON treatment. Mean yields (t/ha) CAN treatments 5.92, 7.22, 7.83 8.16 following 150 kg N/ha, respectively. corresponding with urea 5.28, 6.71, 7.52 7.92 t/ha. reductions (%) to 10.8, 7.1, 4.0 2.9 drier weather soil around time application, poorer performance relative CAN. Grain protein content (at moisture g/kg) ranged from 79 100 g/kg significantly lower than It is concluded that, cereals, better source urea.