A field study was carried out in the Agricultural Research and Experimental Center, Faculty of Agriculture at Moshtohor, Kalubia Governorate, Benha University, during 2006 and 2007 seasons. The aim was to assess influence of nitrogen sources i.e. 120 kg N/fed as a mineral form (min.), 120kg N/fed as organic form (org.), 90 kg N/fed min + 30 kg N/fed org., 60kg N/fed min + 60 kg N/fed org. and 30 kg N/fed min + 90 kg N/fed org. on yield and its components of some maize varieties i.e. S.C 3084, S.C.10 and T.W.C.351. The obtained results showed that the S.C 3084 significantly surpassed the other hybrids in ear leaf area and chlorophyll SPAD-units, number of ears/plant, number of grains/ear, ear weight; grain weight/ear and grain yield/fed. It was noticed that maximum values of plant and ear height, ear leaf area, chlorophyll units, number ears/plant, 100-grain weight, ear weight, grain yield/fed, grain protein content ( GPC) and grain NPK uptake in both seasons were obtained from application of 120 kg N/fed as a mineral form. Whereas, no significant difference was noticed between 90kg N min.+30kg N org./fed and 120 kg N min/fed on most characters studied in both seasons. The interaction between maize hybrids and nitrogen sources significantly affected ear leaf area, chlorophyll SPAD-units, number of grains/ear and grain N uptake in the 2nd season only. |
