Agricultural Research Corporation (ARC) - Sudan
Proceedings of the Meetings of the National Crop Husbandry Committee - NCHC
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Effect of water stress and nitrogen application on grain yield of
wheat
Zakia I. Ali , Shama E. Dawelbeit1, and Ahmed A. Salih
Abstract:
Crop production in arid and semi- arid regions is restricted by soil
deficiencies in moisture and plant nutrients(especially nitrogen).
Consequently adequate levels of irrigation and nitrogen (N) are needed
to secure high yields (E lsiddig 1998). The high cost of fertilizer
nitrogen raises the question about the feasibility of applying N
fertilizer under limited soil moisture condition. For that field
experiments were conducted at the Gezira Research Station Farm, for two
seasons to evaluate the combined effects of water stress and nitrogen
(N) on the productivity of two wheat cultivars as well as nitrogen use
efficiency (NUE). As expected the results indicated that, under normal
irrigation grain yield of both cultivars increased with increasing
levels of N. However, under limited soil moisture conditions, water
stress is a more yield limiting factor than N fertilization for wheat
production under hot dry environments. It is recommended to use only 43
kg N ha-1 in areas of known irrigation problems. Nitrogen use efficiency
was found to decrease with increasing N level and under water stress it
was reduced to half its values under normal irrigation. Both N
application and frequent watering increased total N-uptake and grain
yield of wheat (Triticum aestivum L.) grown under water and nitrogen
stresses in hot dry environments.
Proceedings of the Meetings of the National Crop Husbandry Committee 37th (2005) pp. 155-162
Proceedings of the Meetings of the National Crop Husbandry Committee - Sudan
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