In order to find out the suitable water and nitrogen（N）strategy for sticky maize under drip irrigation,the effects of two irrigation methods and seven N fertilization treatments on physiology,dry mass accumulation and water use efficiency（WUE）of sticky maize were investigated by using apot experiment.The results show that compared to conventional drip irrigation（CDI）,alternate drip irrigation（ADI）significantly increased leaf photosynthetic rate and WUE,reduced water consumption by 19.7% ～24.1%,and enhanced maize dry mass slightly and maize WUEby 34.9%～50.0%.Compared to no N fertilizer（F0）,other N treatments increased leaf WUE by 6.6% ～33.3%,shoot dry mass by 18.9% ～53.7% and 18.3% ～62.0%,and total dry mass by18.3%～53.1% and 19.8%～36.9% under the CDI and ADI,respectively.There was a significant interaction between N fertilization and irrigation method,the combination of ADI and 40% N as basal fertilizer and 60% N as topdressing fertilizer via drip irrigation（F4）had better effects on physiology,dry mass accumulation and water use efficiency of sticky maize.Compared to F0-CDI,F4？ADI increased leaf WUE,shoot and total dry masses,and maize WUE by 121.1%,67.7%,66.8% and 102.4%,respectively.Thus the combination of 40% N as base fertilizer and 60% N as topdressing via drip irrigation and ADI was the optimal drip irrigation and nitrogen fertilization strategy in this study.
China Rural Water and Hydropower
drip irrigation and nitrogen strategy
dry mass aecumulation
water use efficiency