| The effects of nitrogen and phosphorus fertilizer on dry matter distribution, grain filling and grain yield of winter wheat were investigated in the ecological conditions of northwest oasis of China. Four treatments comprised of two nitrogen levels (165 kg·hm-2 and 225 kg·hm-2) and twophosphorus levels (105 kg·hm-2 and 165 kg·hm-2). The results showed that N2P1 and N2P2 had higher grain yields of 7 644.73 kg·hm-2 and 7 686.25 kg·hm-2, and higher water use efficiency (WUE) of 11.67 kg·hm-2·mm-1 and 11.49 kg·hm-2·mm-1, respectively. The grain weight and grain number increased with nitrogen application rates, but the effect of phosphate fertilizer on the yield components was not significant. Further, there weresignificant effects of nitrogen, phosphorus and N×P interaction on the average rate of grain filling (V), the maximum filling rate (Vmax), the increased grain weight number (Ws) and rate of the effective and continuous period of grain filling (Vs), while dry matter accumulation and distribution of winter wheat was significantly different at each growth stage. |