In most parts of the world, especially in arid and semi-arid regions, water and nitrogen use efficiency improvements are the main challenges in crop production systems. In this regard, deficit irrigation and more split applicatioof fertilizer during growing season as both technical and economical methods are used to regulate the amount of these inputs and to increase the performance of production in many crops including maize. Therefore, this research was carried out at Research Farm of the Isfahan University of Technology in 2017, to study the effects of deficit irrigation management and split applicatioof fertilizer on the growth and yield of corn hybrids, using split-split plot arrangement in a randomized complete block design with four replications. Irrigation regimes included two levels of maximumallowablemoisture depletion consisted of I 1 (50-50-50) as control and I 2 (70-60-70) applied at three growth stages (seeding to transfer from vegetative to reproductive stages or 7-8 leaf stage, 7-8 leaf stage to tasseling and tasseling to grain maturity stage) were chosen as main plot, two split application of nitrogen including 3 and 16 parts of 150 kg nitrogen in form of Urea with 45% N as sub-plots and ten corn hybrids as sub-sub-plots. The results showed that the effects of the amount and the type of split applicatioof fertilizer on forage yield depended on the soil moisture content and the type of corn hybrid. At 3 parts nitrogen spiliting, the highest forage yield under normal irrigation regime belonged to SC728 and SC719 (11.9 kg m -2 ) hybrids, and the lowest belonged to Maxima (6.80 kg) and under deficit irrigation the highest forage yield belonged to SC719 and SC798 hybrids (10.88 kg) and the lowest amount belonged to SC722 (5.53 kg). While at 16 parts nitrogen spiliting, the highest and lowest forage yield under normal irrigation regimes belonged to SC720 (13.1 kg) and SC704 (7.44 kg), but under deficit irrigation, it belonged to SC798 (12.1 kg) and 796SC (6.18 kg) hybrids. More split applicatioof fertilizer, under normal irrigation reduced crude protein (CP) of SC798 hybrid, but it was significantly increased in other hybrids. However, more split applicatioof fertilizer at deficit irrigation significantly increased the CP content of corn hybrids, except for Maxima. With more split applicatioof fertilizer, the average amounts of ADF and NDF in silage under normal irrigation condition were decreased by 7.81 and 1.79% and under deficit irrigation by 3.60 and 139%, respectively. More spiliting of N fertilizer under normal irrigation reduced ash percentage of Maxima, SC798 and SC720, but significantly increased the percentage of ash of other corn hybrids. However, more spiliting of N fertilizer in deficit irrigation significantly increased the percentage of ash of corn hybrids except for Maxima, SC704 and SC798 hybrids. In addition, the water productivity of corn hybrids was increased under deficit irrigation management and 16 parts nitrogen spiliting. In general, it can be concluded that the performance of late maturity hybrids was more as compared to SC704 and Maxima in the considered planting date in this experiment for Isfahan region which can be exploited by using deficit irrigation management and more split applicatioof fertilizer. Keywords : Acid detergent soluble fiber, Late maturity hybrid, Split applicatioofitrogen, Water production efficiency, Water shortage.