针对甘肃河西干旱灌区水资源不足和高产农田长期存在施肥量过高和水资源利用率低下的现状，以河西走廊干旱灌区大面积种植的制种玉米为对象，研究不同水肥处理对各生育期土壤水分、水肥利用效率和产量等方面的影响。结果表明，制种玉米在主要生育期耗水量以灌浆-成熟期最高，当灌水量增加时，作物耗水量随之增加，而水分利用效率逐渐降低，在相同灌水水平下，水分利用效率随着施氮量的增加而增加。耗水强度在整个生育期表现出先增后减的趋势，在抽穗-灌浆期耗水强度最大。根据制种玉米的耗水规律，确定了适宜的灌水时期，分别为拔节期、大喇叭口期、抽雄吐丝期、灌浆中后期。在相同的施氮水平下，制种玉米的产量随着的灌水量的增加而增大。在相同灌水水平下，高水高氮处理下制种玉米的产量反而低于高水中氮处理下产量。

According to the situation of insufficient water resources and high fertilization amount and low utilization rate of water resources in high-yielding farmland of Hexi arid irrigation area in Gansu province， the effects of different water and fertilizer treatments on soil moisture， water and fertilizer use efficiency and yield at different growth stages were studied with corn seed planted in large area in Hexi corridor arid irrigation area. The results showed that the largest water consumption of corn for seed was Grouting-mature stage， when irrigation water increases， crop water consumption increases， while WUE decreases gradually. At the same irrigation level， WUE increased with the increase of nitrogen application. The water consumption intensity first increased and then decreased in the whole growth period， and the water consumption intensity was the highest in the period of heading-filling. According to the water consumption law of seed corn production， the suitable irrigation period was determined， including jointing stage， big trumpet mouth stage， tasseling and silking stage， middle and late stage of grouting. At the same nitrogen level， the yield of seed maize increased with the increase of irrigation water. However， under the same irrigation level， the yield of seed corn under high water and nitrogen treatment was lower than that under high water and nitrogen treatment.

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