依据灌溉试验资料，研究夏玉米生育期内的耗水规律及植株蒸腾与棵间蒸发变化规律，分析水分胁迫对其生长发育和产量形成的影响。结果表明，水分适宜处理的夏玉米，生育期耗水量425.25mm，各时段耗水量占全生育期耗水量的百分比分别为14.34%、10.49%、10.43%、15.70%、27.16%、13.63%和8.25%，相应的日平均耗水强度分别为4.064、2.973、2.958、4.452、7.699、3.860和2.192mm/d；玉米田的棵间蒸发量较大，约占其整个生育期总耗水量的35%～38%；各生育时段遭受水分胁迫均会引起一系列不良后果，其中尤以抽雄吐丝前后40d左右缺水影响最大，其次是拔节期缺水。

Based on the data from irrigation experiment,the water consuming law,changing patterns of plant transpiration and interrow evaporation during summer maize growth were studied and the effect of water stress on the growth,development and yield formation also analyzed.It has been shown that the water consumption of summer maize for the suitable water treatment was 425.25mm,the water consumption at each period took up 14.3%,10.49%,10.43%,15.70%,27.16%,13.63%and 8.25%of seasonal water consumplon respectively,and average water consumption per day at the corresponding period were 4.064,2.973,2.958,4.452,7.699,and 2.192mm separately.The interrow evaporation of maize field Was relatively high and accoumted for 35～38%of seasonal water consumption.The water sterss at various growing stages led to a seasonal water consumption.The water stress at various growing stages led to a series of harmful consequences,especially,eater shortage at 40 days around the tussling stage caused the most harmful effect,next Was the water shortage at the jointing stage.

国家“九五”重点科技攻关项目,中国农科院院长基金