| With pot experiment,the water consumption,water use efficiency(WUE) and yields(biomass and grain) of spring wheat were investigated under different water and nitrogen fertilizer levels.The results showed that the effects of water and nitrogen fertilizer on the water consumption,WUE and yields of spring wheat were remarkable.Under sufficient water condition,the water consumption and yields increased with the improvement of nitrogen supply;under mid water condition,the water consumption and yields of low-N treatment was all the highest,and those of high-N treatment were close to those of CK;under drought condition,the water consumption and yields of low-N were close to those of CK,and those of high-N were decreased significantly.There were differences of cumulative water consumption and daily water consumption among different growth stages,and the daily water consumption in filling stage was the highest.Under different water conditions,the WUE of overground dry matter and grain were increased with the increase of nitrogen application,and this effect was much significant under sufficient water condition. |