Abstract:
Field experiments were conducted in the Demonstration Farm
of People’s Arms Defense Camp at El-Getaina (White Nile) for the
two consecutive seasons (summer and winter) 2001/02 to study the
effect of nitrogen and phosphorus fertilizers on yield and yield
components of three cultivars of maize (Zea mays L.) under
irrigation.
The treatments used consisted of three levels of nitrogen
control (N0), 43 kg N/ha, (N1), 86 kg N/ha (N2), two levels of
phosphorus control (P0), 43 kg P2O5/ha, (P1) and three cultivars, Giza-
2 (V1), Mugtama-45 (V2) and Pannar-6480 (V3).
The 18 factorial treatments were executed in randomized
complete block design, with 5 replications.
The results obtained showed that the nitrogen fertilizer had a
significant effect on growth of maize cultivars, particularly plant
height and leaves number, leaf area and dry weight of plant.
Nitrogen fertilizer also significantly affected final seed yield and
some yield components, cob yield and number of seeds per cob.
When phosphorus fertilizer has no significant effect on seed yield.
The studies obtained showed negligible differences between
the two seasons (summer and winter) in seed yield.
This suggest that the maize crop can be grown successfully in
both seasons, but since there is few winter crops, it would be
possible to treat maize as a winter crop in the area to intensively
and diversify the rotations.
