Effects of drip irrigation nitrogen coupling on dry matter accumulation and yield of Summer Maize in arid areas of China

•The study would provide technical basis for the efficient utilization of water and nitrogen in arid regions.•Treatment I2N2 (3750 m3/hm2, 306.5 kg/hm2) achieves the maximum dry matter accumulation rate, and the highest DMA and yield.•The maximum DMA rate occurs at relatively effective accumulated temperature of 0.75-0.80 for all treatments.