Revolutionizing Maize Farming with Potassium Silicate Foliar Spray and Water Management Techniques

By integrating various irrigation and agriculture management techniques, it is possible to considerably improve water productivity. In order to examine the impact of irrigation scheduling (1.0 and 1.2 pan evaporation coefficient), planting method (ridge and raised bed), and potassium silicate foliar application (0 ppm and 100 ppm) on maize (Zea mays L) growth, yield, and water-related factors, a two-season field experiment was conducted in a hot-dry climate region of southern Egypt during 2017 and 2018. The results showed that the seasonal irrigation requirement and consumptive use were higher at 1.2 than the 1.0 pan evaporation coefficient, irrespective of the planting methods. Raised bed planting method saved about 19% of applied water (two seasons average) compared to the ridge planting method. Plants treated with potassium silicates attained higher yields compared to the control, irrespective of the irrigation level and planting method. Moreover, irrigation at 1.2 pan evaporation resulted in the lowest daily ETc values, i.e., 3.15, 6.0, 6.7, and 2.8 mm for plant growth stages, i.e., ini, dev, mid and late. This resulted in the lowest Kc values (0.47, 0.91, 1.16, and 0.61) at different plant growth stages (ini, dev, mid and late). Based on the study findings, it is recommended to use a deficit irrigation of 0.15% based on accumulated pan evaporation values of 1.2, coupled with raised bed planting method and the application of 100 ppm potassium silicates, for optimal maize water productivity and net return.