EFFECT OF WATER STRESS AT GRAIN DEVELOPMENT STAGE OF WHEAT (Triticum aestivum L.) UNDER DIFFERENT LEVELS OF NITROGEN AND PHOSPHORUS FERTILIZERS
EFFECT OF WATER STRESS AT GRAIN DEVELOPMENT STAGE OF WHEAT (Triticum aestivum L.) UNDER DIFFERENT LEVELS OF NITROGEN AND PHOSPHORUS FERTILIZERS
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Date
1983-02
Authors
BELLO, USMAN BABA JADA
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Abstract
Investications to find the effect of water stress
during the reproductive phase of wheat under different
levels of nitrogen and phosphorus fertilizers were carried
out at Samaru, Zaria (Lat. 11° 11 N, Long, 07° 38' E).
Water stress was imposed during the flowering, milk,
and milk-dough periods. Water stress reduced the grain
yield by 31% when stress occured at flowering, and by
15.46% and 14.893' at milk and milk-dough periods,
respectively. The yield reduction occured through
reduction in the number of grains/spike in case of stress
at flowering, and through reduction in grain weight/spike
in case of stress at milk and milk-dough periods.
Nitrogen levels used were 0, 60 and 120kg N/ha.
Nitrogen positively increased all the parameters examined,
especially the vegetative growth. Most of the reproductive
components responded significantly to only 60 N kg/ha.
Zero and 30kg P2O5/ha levels of phosphorus were used.
Phosphorus on its own did not significantly affect most
of the parameters except the leaf area/plant and grain
yield.
However, the nitrogen-phosphorus interaction showed
that nitrogen application without30kg P205 /ha produced
little effect above 60kg N/ha. Application of 30kg P205/ha
without nitrogen tended to have negative effect or no
significant effect all but the yield of wheat crop
responded significantly to the application of 120kg N/ha
when 30kg P205 /ha was applied.
Description
A thesis submitted to the Postgraduate School,
Ahmadu Bello University
in Partial fulfillment of the requirement for
the Degree of Mast of Science in Agronomy
DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA
February 1983
Keywords
EFFECT,, WATER,, STRESS,, GRAIN,, DEVELOPMENT,, STAGE,, WHEAT,, (Triticum aestivum L.), UNDER,, DIFFERENT,, LEVELS,, NITROGEN,, PHOSPHORUS,, FERTILIZERS.