Effect of Irrigation Intervals, Biological, Organic and Mineral Fertilization on the Yield and Yield Components of Sunflower Plants

TWO FIELD experiments were carried out at the experimental farm of the Faculty of Agriculture, Saba Basha, Alexandria University, during 2007 and 2008 seasons to investigate the effect of irrigation intervals, organic manure and nitrogen biofertilization on the yield and its components of sunflower crop. Irrigation treatments were every one week, two weeks and three weeks, respectively. The fertilization treatments were 60 kg N/fed - chicken manure at rate of 8 ton/fed -commercial product contain Azospirillum, Azotobacter, Kebsiella and Bacillus sp.-and 30 kg N/fed. The results indicated that irrigation every two weeks had the highest values for all the studied characters. The fourth treatment (30kg N/fed) had significant effect on all the studied characters in both seasons. The results suggest that irrigation every two weeks and application of 30 kg N/fed could be recommended for maximum yield of sunflower under similar conditions