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Changes oil content and fatty acid composition of peanut by irrigation
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  • Sevim AKÇURA,
  • İsmail TAŞ,
  • Kağan KÖKTEN,
  • Mahmut KAPLAN,
  • Aydın ŞÜKRÜ BENGÜ
Sevim AKÇURA
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İsmail TAŞ
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Kağan KÖKTEN
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Mahmut KAPLAN
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Aydın ŞÜKRÜ BENGÜ
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Abstract

Experiments were conducted in the 2017 and 2018 growing seasons. Halisbey, NC-7, and Sultan peanut cultivars were used as the plant material. Irrigation intervals were set as two and four days, and irrigation levels were set as 50% (I50), 75% (I75), 100% (I100) and 125% (I125) of Class-A pan evaporations. Oil content, unsaturated and saturated fatty acids of peanut cultivars were determined. Experimental data were initially subjected to variance analysis, then regression analyses were conducted for irrigation intervals, and irrigation levels of the cultivars and biplot analysis was performed to assess the cultivar x irrigation interval x irrigation level interactions. For oil content, treatments were identified as the most appropriate irrigation for a two-day irrigation interval of all cultivars; I100 for four-day irrigation interval of Halisbey and Sultan cultivars and I75 for four-day irrigation interval of NC-7. Oleic, linoleic, and palmitic acids were the major fatty acids of peanuts. Cultivars exhibited different variations in these fatty acids based on irrigation intervals and irrigation levels. In all cultivar, the irrigation intervals and irrigation levels with a high oleic acid content yielded low linoleic and palmitic acid contents. According to present biplot and regression analyses, the greatest oleic acid contents were obtained from two and four-day irrigation intervals of I50 treatments in Halisbey and NC-7 cultivars and from two and four-day irrigation intervals of I75 treatments of the second year in Sultan cultivar. Present findings revealed that for quality peanut production, both irrigation intervals and irrigation levels should be taken into consideration.