EFFECT OF NITROGEN FERTILIZATION ON YIELD AND ITS COMPONENTS OF SOME MAIZE GENOTYPES

Abstract

        The study aimed to demonstrate the effect of nitrogen fertilization on the yield of maize and its genotypes (Al Maha, Sumer, Al Fajr, Baghdad, 5018, Zia1×Zia4, Zia2×Zia4) under two levels of nitrogen fertilization (92 and 276 kg N/ ha), the experiment was applied using the randomized complete block design (RCBD) with split plot arrangement with three replications, and the main plots included two levels of nitrogen fertilization, As for the sub-plots, they included seven genotypes, The results showed the superiority of genotype 5018 by giving it the highest total kernels yield amounting to 8.541 tons/ h as a result of its superiority in the characteristics of the yield components which are the number of ears (1.350 ear / plant), the number of kernels per ear (721.950 kernel/ ear) and the weight of 100 kernel (29.340 g), as for the levels of nitrogen fertilization, the results showed that the levels of fertilizers were not significant in all traits except for the characteristic of the biological yield.