Effect of Irrigation Strategies on Yield of Drip Irrigated Sunflower Oil and Fatty Acid Composition and its Economic Returns

Authors : Semih Metin SEZEN, Servet TEKİN, Dilşat BOZDOĞAN KONUŞKAN

Pages : 163-173

Doi:10.15832/ankutbd.382617

View : 18 | Download : 8

Publication Date : 2019-06-05

Article Type : Research Paper

Abstract :A field trial was conducted to observe the effects of different irrigation strategies on the yield and the water use, oil  content and marginal return of sunflower which was irrigated by means of a drip system during 2010 and 2011 under  Çukurova condition of Turkey. The irrigation strategies include three irrigation intervals insert ignore into journalissuearticles values(A1: 25 mm; A2: 50 mm; A3: 75  mm of cumulative pan evaporation); and six water levels insert ignore into journalissuearticles values(WL); based upon the percentages of cumulative pan evaporation  insert ignore into journalissuearticles values(WL1= 0.50, WL2= 0.75, WL3= 1.00 and WL4= 1.25);. In addition, WL5= PRD50 and WL6= PRD75 treatments were  evaluated. They obtained water from alternative laterals 50% and 75% of the WL3 treatment. Additionally, a nonirrigated  treatment insert ignore into journalissuearticles values(NI); was included as control plot in the experiment. In each of the experimental years, the largest and  the smallest average yields were acquired from the A2WL4 and NI treatments, respectively. The oil content and fatty acid  composition were significantly affected by irrigation strategies. The oil content increased with the increasing amount of  irrigation. Among all irrigation intervals, PRD-50 insert ignore into journalissuearticles values(WL5); treatment provided the largest water use efficiency insert ignore into journalissuearticles values(WUE); and  irrigation water use efficiency insert ignore into journalissuearticles values(IWUE); values in both growing seasons. In order to attain higher yields and a generated  the marginal return, A2WL4 irrigation regime is suggested for sunflower production in the Mediterranean region. A2WL3  water strategy is proposed for an acceptable marginal return in case of water shortage. 
Keywords : Reduced irrigation, sunflower, irrigation scheduling, oil and fatty acid, marginal return