Greener Journal of Agricultural Sciences Vol. 3 (12), pp. 801-808, December 2013.
Manuscript Number: 060913818
Comparative Growth and Grain Yield Response of Five Maize Varieties to Nitrogen Fertilizer Application
Institute of Agricultural Research and Training, Obafemi Awolowo University, P.M.B. 5029,
Moor Plantation, Ibadan, Nigeria.
Email: folakeawoeyo @ yahoo.com
Field trials were conducted at the research field of
Institute of Agricultural Research and Training, Moor
plantation, Ibadan during 2010 and 2011 cropping season in
order to evaluate the performances of five open pollinated
maize varieties subjected to two fertility levels 0 and 100
kg Nha-1 fertilizer. The trials consisted of split-plots
arranged in randomized complete block design of three
replicates. The objective was to evaluate and compare the
responses of five maize varieties to N fertilizer
application. Data were obtained from plant height, ear
height, leaf area, ear length, number of kernels per cob,
weight of 100 kernels and grain yield. Data were analyzed
using ANOVA and means separated by DMRT (P=0.05 and 0.01).
The results obtained showed that N fertilizer significantly
increased the growth and yield related parameters of all the
traits except ear height and ear length while grain yield
was higher in 2011. Varieties by nitrogen interactions
differed significantly for the various parameters measured
except for ear height and kernel/cob. In the fertilized
plots ART SW5-OB had highest mean grain yield. Obatanpa and
ARTSW6-OB had highest grain yield compared with other
varieties in the fertilizer stressed plots while Ile1-OB had
highest yield reduction under the two fertility
environments. ARTSW5-OB had the highest nitrogen use
efficiency while Obatanpa and ARTSW6-OB were least, but
produces better grain yield under low nitrogen input. In
conclusion, the result indicated a positive and varied
response of maize varieties to nitrogen fertilizer
Keywords: Fertilizer, Grain yield, Plant height, Nitrogen, Nitrogen use efficiency and Varieties.
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