Evaluation of Some Maize Hybrids under Nitrogen Fertilization Levels

Genetic selection of maize hybrids is related to using high nitrogen levels, which require to a stronger N input to accomplish their yield potential. This study aimed to investigate the response of some maize hybrids to five nitrogen fertilizer levels (0, 75, 100, 125, 150 kg N fed-1) at the Experimental and Research Center, Moshtohor Faculty of Agriculture, Benha University, Egypt, during 2013 and 2014 seasons. Results showed SC 30k8 W hybrid surpassed other hybrids in No. grains/row, ear weight, grain yield/plant and grain yield fed-1. Application of 125kg N fed-1gave the highest values of No. grains/row, ear grains weight, 100-grain weight, shelling %, grain yield/plant and grain yield fed-1. Interaction of maize hybrids x N fertilizer levels had significant effect on plant height, No. grains/row, grain yield/plant and grain yield fed-1 in the combined analysis. Highly significant positive correlation values were detected between grain yield fed-1 and each of grains ear weight, shelling %, grain yield/plant, Number of grains/row, ear weight and 100-grain weight. It could be recommended that fertilizing SC 30k8 maize hybrid by 125 kg N fed-1 could achieve the highest grain yield and economic use of nitrogen fertilization in this location and similar areas.