Two field experiments were conducted at the Experimental Farm, Faculty of Agriculture, (Saba Basha), Alexandria University, Alexandria Governorate, Egypt, during two the summer seasons of 2020 and 2021 to investigate the effect of foilar application treatments on maize yield and quality under the three irrigation intervals. In both seasons, this factorial experiment was set up in a split-plot design with three replications. Irrigation intervals (every 15, 20, and 25 days) were the main plot, whereas foliar application treatments (water=control, Si, Ag NPs, and Si + Ag NPs) were distributed at random within the subplot in both seasons. The results showed that irrigation intervals, foliar application and their interaction significantly affected yield and its components in both seasons, whereas irrigation interval (20 days) recorded the highest values, foliar application of Si + Ag NPs to maize reduced the effect of irrigation intervals and increased yield and its component, whereas foliar application of Si + Ag NPs to maize with irrigation intervals every 20 days increased yield and yield component characters in the two seasons under study conditions. Finally, the results could be concluded that to increase the grain yield and its component of yellow hybrid of maize (SC 2066), it can be irrigated every 20 days with foliar application of Si + AgNps under soil salt-affected in Alexandria conditions and similar Regions.