Effect of rate, timing and form of nitrogen application on yield formation and nitrogen balance in oilseed rape production

摘要: In 4-years field experiments the effects of rate (0, 96, 120, 216 kg N ha −1), timing (beginning growing season / beginning shooting flowering) and form (CAN: ammoniumnitrate + CaCO 3; BA: 73 % ammonium N, 19 nitrate 8 DCD N) nitrogen (N) application on yield formation balance in oilseed rape (Brassica napus L.) production were studied. Seed increased up to highest rate. Under conditions limited supply delayed resulted significantly higher yields compared with early application, despite impaired shoot growth until flowering. studies confirmed that high achieve maximum seed may result a considerable surplus. The affected neither nor uptake balance.