Ibrahim M. Abdel–Fattah and Dalia A. Elhag( 2018). Conjunctive use of rainfall and irrigation for wheat crop in North Nile DeltaAnnals of Agric. Sci., Moshtohor ISSN 1110-0419
Vol. 56(2) (2018), 447 – 458
Abstract: To find out the impact of rainfall and irrigation on wheat crop and its water functions, a field trial was carried out at Sakha Agricultural Research Station, North Nile Delta during the two seasons 2015/16 and 2016/17. Treatment A which consists of rainfall only has the lowest applied water (Wa), consumption use (CU) and crop yield, the traditional irrigation treatment E consists of no missing irrigation at any growth stage. Average contribution of rainfall in water applied was52.5, 32.4, 32.8, 32.3 and 27.1% for treatments A, B (skipping irrigation during vegetation), C (skipping irrigation during flowering stage), D (missing irrigation during milking stage) and E (no skipping irrigation), respectively. Skipping irrigation during vegetation stage caused a slight decrease in wheat yield. In comparison with the traditional treatment, mean water savings were 48.5, 16.5, 17.4 and 16.3 %, while the decrease in crop yield was 43.4, 21.2, 11.2 and 5.9 % for treatments A, B, C and D, respectively. Most of yield components showed similar trend with those of applied water.
Rainfall in the area could partially offset the water needs of wheat crop decreasing the amount of applied irrigation water and ultimately increasing the life time of irrigation network infrastructures.
Keywords: (conjunction use .)
