Abstract
Modes maize hybrids need to high amounts of nitrogen, phosphorus and potassium;therefore, two field experiments were conducted at the Experimental Farm of SidsAgricultural Research Station, ARC, Beni-Suef Governorate, Egypt during the two successiveseasons of 2015 and 2016 to evaluate the effect of three NPK levels, i.e., 80/6/10, 120/12/20and 140/18/30kg N, P2O5 and K2O/fad , respectively under four maize hybrids, namely, whitesingle cross 10, white three way cross 128, yellow single cross 168 and yellow three waycross 368. Results showed that white single cross 10 gave the highest values of maize growth,yield and yield components as well as NPK uptake in grains and/or stover, except 100 grainweight and NPK concentration in grains and stover which were not affected. On the otherhand, yellow three way cross 368 possessed the lowest values. The highest dose of NPKfertilizers produced the highest growth traits, yield and yield components and NPK uptake.The number of rows/ear, number of grains/row and NPK concentration in grains and stover.The white single cross 10 when supplied with 140/18/30kg N, P2O5 and K2O/fad produced thehighest values of growth, yield and yield components traits. The lowest values were exertedunder yellow three way cross 368 when received 80/6/10kg N, P2O5 and K2O/fad, respectively.
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