Effect of nitrogen and phosphorous rates and sources on grain and forage yield of maize in river Nile State
Abstract
251 words
The study was conducted at two locations, namely, Hudeiba
Research Station Farm (moderately fertile soil) and Matera
(poor soil) in River Nile State for two seasons between 20082010.
The objective of the study was to investigate the effect
of phosphorous fertilizer source, nitrogen source and rate on
forage and grain yields of maize. Two sources of phosphorous,
namely, triple super phosphate (TSP) and diammonium
phosphate (DAP) and two nitrogen sources (urea and
ammonium nitrate) at three rates, 0.0, 43 and 86 kg N/ha were
used in the study. The design used was a split- split- plot with
three replicates. Phosphorous sources were applied to the main
plots and nitrogen sources and rates were assigned to the splitand
split plots, respectively. The results showed that phosphorous
and nitrogen sources had no significant effects on both forage
and grain yields of maize at the two locations in the two seasons.
However, nitrogen rate had significant effects on yields of maize.
Application of nitrogen at 86 kg N/ha increased the forage and
grain yields of maize over the 0.0 N treatments by 5, 0.6 t/ha
and by 700, 444 kg/ha at Hudeiba and Matera, respectively, in
the first season. Whereas in the second season it increased both forage and grain yields of maize by 7, 6 t/ha and 1175,
1017 kg/ha at Hudeiba and Matera, respectively. In conclusion,
application of nitrogen fertilizers in the two forms significantly
increased maize in yields in the two soils types and should be
promoted in the study areas.
Subjects
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