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Productivity of some sunflower hybrids grown on newly reclaimed sandy soils, as affected by irrigation regime and fertilization / productividad de algunos híbridos de girasol bajo la influencia del régimen de riego y método de fertilización en diferentes sistemas de riego aplicados en los suelos arenosos recientemente roturados al cultivo / productivité de certains hybrides de tournesol soumis aux régimes d’irrigation et d’utilisation d’engrais dans différents systèmes d’irrigation sur des sols sableux récemment asséchés
- Abdel-Wahab, A.M., Rhoden, E.E, Bonsi, C.K., Elashry, M.A., Megahed, Sh.E., Baumy, T.Y., El-Said, M.A.
- Helia 2014 v.28 no.42 pp. 167-178
- Helianthus annuus, fertilizer rates, flood irrigation, foliar application, hybrids, irrigation management, microirrigation, sandy soils, seed oils, seed yield, sprinkler irrigation, summer, surface irrigation, water use efficiency, Egypt
- Productivity of sunflower hybrids under surface (flooding), dripping and sprinkler irrigation systems was studied in 1999 and 2000 summer seasons at the Experimental Farm, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt, on sandy soil. Under surface as well as under drip systems, three irrigation regimes (high, medium, and low according to the amount of water supplied to the crop throughout the seasons) and 4 fertilization treatments, namely 45 N+15.5 P₂O₅+25 K₂O or 90 N+31 P₂O₅+50 K₂O/fad. (fad.=4200 m²), without or with biofertilization+micronutrients foliar application, were studied.Under sprinkler system, one irrigation regime and the four fertilization treatments was studied. In the 1999 season, two hybrids (XF4731 and Euroflour) were tested under surface and drip irrigation systems while under sprinkler system the tested hybrids were XF4731 and Vidoc. In the 2000 season, the studied hybrids were Euroflour and Hightec under the three systems.Over irrigation regimes and fertilization treatments in the 1999 season, XF4731 had a significantly higher seed yield/fad. than Euroflour. XF4731 attained 953, 973 and 471 kg/fad. under surface, sprinkler and drip irrigation systems, respectively. In the 2000 season, Hightec significantly outyielded Euroflour in two systems. The reverse was true under drip irrigation, as Euroflour produced a significantly higher seed yield/fad. than Hightec (523 kg). The water use efficiency (WUE - kg seeds/m³ water) of the hybrids as well as their oil yield (kg/fad) showed nearly the same trend of seed yield/fad. Meanwhile, Euroflour recorded the highest seed oil percentages under the different systems and regimes of irrigation.The studied high irrigation regimes under surface irrigation (6228-4796 m³ water/fad.) and under dripping system (2690-2549 m³ water/fad.) and application of high rates of NPK only under drip system or combined with biofertilization+ micronutrients foliar under surface and sprinkler systems are recommended for sunflower growing on the newly reclaimed sandy soil in Ismailia Governorate, Egypt.