Abstract:Nitrogen fertilization is a key factor of improving crop yield and quality, yet it is also a dangerous source of water and air pollution. In field ecological system, the negative effects to environment coming from the Nitrogen fertilizer (Nf) application in maize, rice and vegetable are paid close attention, but in wheat rarely taken into account. In order to find out the effects of Nf to environment and improve Nf use efficiency in winter wheat, the spatio\|temporal variations of soil NO - 3\|N and appar...