[Objective] This project aims to study the optimal irrigation amount for drought resistance identification and evaluation of maize under shortage water stress in order to provide a reference for the identification of drought resistance of maize.[Method]The present 5 main varieties in Xinjiang were used as experimental materials, the effects of irrigation on yield and drought resistance of 5 varieties were studied under the condition of insufficient irrigation during the whole growth period.[Result]The results showed that the yield and drought resistance of the 5 materials showed a downward trend with the gradual decrease of total 5,283-2,283 m3/hm2.When the irrigation amount was 3,795 m3/ hm2, the yield and drought resistance of the 5 materials were the biggest.There was a significant positive correlation between the yield and grain number per ear, and grain number per row, and no correlation with 100 grain weight.[Conclusion]The total amount of water supplied by the control of irrigation was 3/4 (3,795 m3/ hm2) under normal irrigation, the yield of the five maize hybrids decreased by half, and the difference of drought resistance coefficient was maximized, which could be used for the identification and evaluation of drought resistance in maize.%[目的]研究欠量灌水胁迫下,玉米抗旱性鉴定和评价所需的最佳灌水量,为玉米抗旱性的准确鉴定提供参考依据.[方法]以5个当前新疆主栽玉米品种为材料,在全生育期进行梯度欠量灌水胁迫处理,分析欠量灌水对玉米产量及抗旱性的影响.[结果]随着灌水总量5 283~2 283 m3/hm2逐渐降低,5个玉米品种的产量和抗旱性均呈下降趋势.灌水量在3 975 m3/hm2时5个玉米品种的产量和抗旱性差异最大.欠量灌水胁迫下单株产量与穗粒数和行粒数呈极显著正相关,与百粒重的相关性不显著.[结论]欠量灌水的供水总量为正常灌水对照的3/4时(3 975 m3/hm2),5个玉米杂交种产量下降一半,抗旱系数差异最大化,可用于玉米的抗旱性鉴定和评价.
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