INFLUENCE OF NITROGEN FERTILIZER LEVELS AND WATER DEFICIT DURING SOME GROWTH STAGES ON WHEAT YIELD AT THE NORTH DELTA OF EGYPT

Document Type : Original Article

Authors

1 Water Requirements and Field Irrigation Department, El-Serw Agric. Res. Station.

2 Water Requirements and Field Irrigation Department, Nubaria Agric. Res. Station.

3 Soil Fertility and Plant Nutrition Department, El-Serw Agric. Res. Station.

Abstract

Field trials were conducted at El-Serw Agricultural Research Station (North Delta) during the 1997/98 and 1998/99 winter seasons to investigate the influence of nitrogen fertilizer levels and irrigation water deficit during some growth stages on wheat yield, water consumptive use, water use efficiency and to develop wheat crop coefficient values for the North Delta area. Wheat cultivar Sakha 69 was used in this study. A split-plot statistical design with four replication was used. Four irrigation treatments (I1 = full irrigation, I2 = no irrigation at tillering, I3 = no irrigation at heading, and I4 = no irrigation at flowering) in the main plot and three N-fertilizer levels (N1 = 30, N2 = 60, and N3 = 90 kg N/fed) in the sub-plots were tested. Results indicated that there was a significant effect of the tested variables on wheat grain and straw yields. Average grain yields were 2.03, 1.59, 1.78 and 1.75 t/fed for the I1, I2, I3, and I4 irrigation treatments, respectively. Water consumptive use values varied between 27.3 cm for the I2 N1 treatment to 39.66 cm for the I1 N3 treatment. Also, water use efficiency value of 1.57 kg grain/m3 water consumed was obtained from the I1 N3 treatment. Average seasonal crop coefficient value of 0.78 was obtained for wheat crop grown at the North Delta area. Tillering stage of growth was the most sensitive stage for water deficit at El-Serw area.
Journal of Soil Sciences and Agricultural Engineering
Volume 25, Issue 7
July 2000
Pages 4727-4735

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