Field experiment was carried out in the Didactic and Experimental Department in Swadzim (52^o26’ N; 16^o45’ E) near Poznań in years 2004-2007. The experiment was established in a „split-plot” design with 3 factors and 4 field replications. Reactions of two maize hybrid types to differentiated nitrogen and magnesium fertilization and to the method of magnesium application were studied. The influence of these factors on chlorophyll content and mineral components in the dry matter of maize plants in the phase of 5-6 leaves (BBCH 15-16) was estimated. On the basis of chloroplast pigments content, it was found that the hybrid LG 2244 stay-green type was better nourished with nitrogen, in comparison with the traditional hybrid Anjou 258. The highest nitrogen content in dry plant matter was found after the application of a 90 kg N·ha^-1 nitrogen dose, while for magnesium of a 150 kg N·ha^-1 dose. A better method of magnesium application has been shown to be the sowing in row method, in comparison with the broadcasting method. As a result of magnesium sown in rows, the Mg content in plant dry matter was higher compared with the broadcasting method and with a zero dose of magnesium.

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