ارزیابی کیفی روغن دو رقم زیتون طارم و دزفولی در شرایط اهواز

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز،ایران

2 استادیار،گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز،ایران

3 استاد،گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز،ایران

چکیده

با توجه به اینکه خصوصیات کیفی روغن زیتون تحت تاثیر شرایط محیطی و رقم می باشد. لذا این پژوهش به منظور بررسی برخی از خصوصیات کیفی روغن ارقام طارم 2 و دزفول زیتون به صورت طرح بلوک‌های کامل تصادفی با سه تکرار در دانشگاه شهید چمران اهواز در سال 96-1395 به اجرا درآمد. نتایج نشان داد که روغن استخراج شده از رقم طارم 2 دارای بالاترین ارزش پراکسید (25/9 میلی اکی والان اکسیژن بر کیلوگرم روغن) ، میزان محتوای کلروفیل (10/8 میلی گرم بر کیلوگرم روغن) و کاروتنوئید (16/0 میلی گرم بر کیلوگرم روغن) و ضریب خاموشی K232 (32/2)و K270 (61/0) بود ولی میزان محتوای فنول کل (66/552 میلی گرم بر کیلوگرم روغن) در روغن استخراج شده از میوه رقم دزفولی بیشتر بود. همچنین حداکثر میزان اسید اولئیک (52/58 درصد) و حداقل مقدار اسید پالمتیک (6/17درصد) از روغن رقم طارم2 بدست آمد در حالی که در روغن استخراج شده از رقم دزفولی مقدار اسید لینولئیک (05/18 درصد) حداکثر بود. علاوه براین، نسبت اسید اولیک به اسید لینولئیک در روغن استخراج شده در رقم طارم 2 بیشتر از رقم دزفولی بود لذا با توجه به نتایج این آزمایش می‎توان انتظار داشت که روغن استخراج شده از رقم طارم 2در مقایسه با رقم دزفولی از پایداری اکسیداتیو بالاتری برخودار باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Oil quality evaluation of two olive cultivars ‘Tarom 2’and ‘Dezful’ in Ahvaz condition

نویسندگان [English]

  • Yousef Lotfi 1
  • Esmaeil Khaleghi 2
  • Norollah Moallemi 3
1 Former MSc. Student of Horticultural Science Department, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
2 Assistant Professor, Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3 Professor, Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
چکیده [English]

Given that, the qualitative characteristics of olive oil are influenced by environmental conditions and cultivars. Therefore, this study was carried out to investigate some of the oil qualitative characteristics of Tarom 2 and Dezful cultivars of olive as a randomized complete block design with 3 replications at Shahid Chamran University of Ahvaz during 2016-2017. The results indicated that, the oil extracted from Tarom 2 cultivar exhibited the highest peroxide value (9.25 meq of O2/ kg of oil), chlorophyll content (8.10 mg/kg of oil), and carotenoid (0.16 mg/kg of oil) and K232 and K270 extinction coefficients of 2.32 and 0.61, respectively. However, total phenolic content of the oil extracted from Dezful cultivar (552.66 mg/kg of oil) was higher than that of the other cultivar. In addition, the highest oleic acid content (58.52%) and lowest palmitic acid content (17.6%) were measured on the oil obtained from the Tarom 2 cultivar, while the oil extracted from Dezful cultivar showed the highest linoleic acid content (18.05%). Furthermore, oleic acid-to-linoleic acid ratio was higher in the oil extracted from the Tarom 2 cultivar rather than the one taken from the Dezful cultivar. Therefore, based on the results obtained from the experiment, the oil extracted from Tarom 2 cultivar is expected to exhibit higher oxidative stability than that of the Dezful cultivar.

کلیدواژه‌ها [English]

  • Acidity
  • Carotenoid
  • Chlorophyll
  • Extinction coefficients
  • Fatty acids profile
  • peroxide value
  • Total phenol content
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