An experiment was conducted at the Experimental Farm of Sakha Agricultural Research Station, Kafr-Elsheikh, Egypt, during 2019 and 2020 to study the effect of different forms and rates of slow release urea nitrogen fertilizers; sulfur (SCU), formaldehyde (FCU) and dolomite (DCU), coated urea with fast release (un coated) urea fertilizers (UCU) on growth, yield and grain quality of maize yellow hybrid Single Cross168. The experiment was laid out in completely randomized blocks design with four replicates. The treatments were (UCU at 120, SCU, FCU and DCU at 60, 80 and 100 kg N fad.^-1). Results showed that, using slow release nitrogen fertilizers caused significant increase on most growth parameters, yield and grain quality. The highest values were obtained by SCU followed by FCU and then DCU at 100 kg N fad.^-1 except chlorophyll a, b and carbohydrates content which increased with DCU at 100 kg N fad.^-1. Using slow release nitrogen fertilizers can lead to saving mineral fertilizers, reduces nitrogen loss in the soil, reduced environmental pollution and also, provides the plant with the nutrients it needs throughout its growth.