Research Development Trends of Nitrogenous fertilizer Use Efficiency in Crop

Nitrogenous fertilizer use efficiency status biology and the methods of nitrogenous fertilizer use efficiency was summarized in this text.From the balanced fertilization, using slow/controlled release fertilizer, nitrogen fertilizer deep application and spilt application rate, application time, soil application of different options according to the time, using fertilizer diagnostic equipment, adding synergist, precision fertilizer etc aspect.Summarized the biological nitrogen methods,and future outlooking in biological section of the prospect of nitrogen technology.