UN SDG
Horticultural Studies (HortiS)
2016, Vol 33, Num, 1 (Pages: 93-108)
Effect of different drip irrigation regimes on yield and oil quality of sunflower
2 Kahramanmaraş Sütçü İmam Üniversitesi Ziraat Fakültesi Biyosistem Mühendisliği Bölümü, Kahramanmaraş
3 Mustafa Kemal Üniversitesi Ziraat Fakültesi Gıda Mühendisliği Bölümü, Hatay DOI : 10.16882/derim.2016.87538 Viewed : 1725 - Downloaded : 839 This study examines the effects of different irrigation regimes on yield, yield components, oil yield and quality and water use of sunflower (Oleko variety) irrigated with a drip system under field conditions in 2010 and 2011 growing seasons at the Alata Horticultural Research Institute, Tarsus Soil and Water Resources area in the Mediterranean region of Turkey. Irrigation regimes consisted of three irrigation intervals (A1:= 25 mm; A2:= 50 mm; A3: = 75 mm of cumulative pan evaporation) and six irrigation levels (I1=0.50, I2=0.75, I3=1.00 and I4=1.25). In addition, I5=PRD75 and I6=PRD50 treatments were considered. They received 75 and 50% of the full irrigation (I3) treatment from alternative laterals, respectively. Also, rainfed treatment is a control plot in the experiment. Maximum and minimum yields were obtained from the A2I4 and rainfed treatments, respectively in all experimental years. As the irrigation level value decreased the total yields in each irrigation interval also decreased. Seasonal irrigation amounts in the treatments varied from 199 mm to 563 mm in the experimental years. Seasonal evapotranspiration values in the treatments varied from 243 mm to 611 mm in the experimental years. Both irrigation amounts and irrigation frequencies had significantly effects on oil content of sunflower. The saturated (palmitic and stearic acid) and unsaturated (oleic and linoleic acid) fatty acid contents were significantly affected by water stress. In conclusion, A2I4 irrigation regime is recommended for sunflower production in the Mediterranean region in order to attain higher yields with improved quality. In case of water shortage, A2I13 irrigation regime is recommended to increase sunflower yield and quality. Keywords : Deficit irrigation, Sunflower, Water use efficiency, Yield and quality, Partial root drying
