A combination of careful irrigation and nitrogen(N) management is needed to improve N uptake efficiency and to minimize fertilizer N loss in the arid oasis agricultural area of northwest China.A field experiment was conducted to investigate the effects of different irrigation and N application rates on plant N uptake,soil nitrate nitrogen(NO-3-N) distribution in soil profile and fertilizer N loss on no-tillage farmland with standing stubble in the oasis region of Shiyang river basin,Gansu province.The exper...