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

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 (A 1 : 25 mm; A 2 : 50 mm; A 3 : 75 mm of cumulative pan evaporation) and six water levels (WL) based upon the percentages of cumulative pan evaporation (WL 1 = 0.50, WL 2 = 0.75, WL 3 = 1.00 and WL 4 = 1.25). In addition, WL 5 = PRD50 and WL 6 = PRD75 treatments were evaluated. They obtained water from alternative laterals 50% and 75% of the WL 3 treatment. Additionally, a nonirrigated treatment (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 A 2 WL 4 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 (WL 5) treatment provided the largest water use efficiency (WUE) and irrigation water use efficiency (IWUE) values in both growing seasons. In order to attain higher yields and a generated the marginal return, A 2 WL 4 irrigation regime is suggested for sunflower production in the Mediterranean region. A 2 WL 3 water strategy is proposed for an acceptable marginal return in case of water shortage.

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“…In the conditions of modern climatic changes, which increase the energy supply of the Polissia zone, this illuvial horizon serves as a screen for the reproduction of underground water resources, which leads to their progressive depletion. A radical means of combating such a negative ecological phenomenon for the new climatic conditions in Polissia is the destruction of this illuvial horizon by means of deep meliorative loosening or plantation plowing [14]. Such measures have been practiced in drainage reclamation to accelerate the cultivation of drained soils, which require periodic repetition to maintain a high level of homeostasis (fertility) of these soils.…”

“…The placement of experimental sites is systematic, and replication is fourfold [14]. Tensiometric sensors installed at different depths of the soil profile and distance from the water supply point were used to determine the timing of irrigation and study evapotranspiration [10; 12].…”

“…Trehobchuk, M.A. Khvesyk, et al [14][15][16][17][18][19]. Literary sources indicate the existence of a number of studies in the direction of a comprehensive assessment of the economic effectiveness of reclamation measures, taking into account the peculiarities of their implementation in modern market conditions.…”

Root length and leaf cuticular wax: The traits associated with drought avoidance in sunflower hybrids

“…Hence, studies in large containers would aid in selection of traits responsible for drought resistance. Sunflower is highly responsive to irrigation (Pejic et al, 2009; Sezen et al, 2019) [32,46] and moisture stress decreases the seed yield (Silva et al, 2015;Sezen et al, 2019) [50,45] . Furthermore, in the changing climate scenario, drought stress is likely to be continued as major abiotic limitation.…”

Coupling effects of water and nitrogen on photosynthetic characteristics, nitrogen uptake, and yield of sunflower under drip irrigation in an oasis

“…Previous papers have studied the impact of irrigation strategies and fertilization schedules on sunflower under drip irrigation in various regions. Sezen et al [17] studied the effects of different irrigation strategies on sunflower under a drip system and found that the oil contents of sunflower increased with increasing irrigation amounts. Elnaz et al [18] also found that the seed yield and oil yield of sunflower decreased by 16.2% and 22.3% when irrigation water was lacking.…”