اثر افزودن روغن‌های کلزا، سویا و ماهی به جیره خوراکی بر ترکیب اسیدهای چرب و کیفیت گوشت بره‌های پرواری

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

زمینه مطالعاتی: در سال­های اخیر استفاده از روغن­ها در جیره دام به دلیل داشتن برخی اسیدهای چرب مفید برای سلامتی انسان همچون اسیدلینولئیک و اسیدلینولنیک مورد توجه قرار گرفته است. هدف: بررسی تاثیر افزودن روغن­های کلزا، سویا و ماهی به جیره خوراکی بر کیفیت و ترکیب اسیدهای چرب گوشت بره­های پرواری بود. روش کار: 35 راس بره نر با میانگین وزن 2 ±8/27 کیلوگرم در یک دوره­ی 84 روزه مورد استفاده قرار گرفت. تیمارهای آزمایشی شامل 1) شاهد (بدون افزودن روغن)، 2) 3 درصد روغن ماهی، 3) 3 درصد روغن کلزا، 4) 3 درصد روغن سویا، 5) 5/1 درصد روغن ماهی + 5/1 درصد روغن کلزا، 6) 5/1 درصد روغن ماهی + 5/1 درصد روغن سویا و 7) 5/1 درصد روغن کلزا + 5/1 درصد روغن سویا بودند. نتایج: منابع مختلف روغن در سطح 3 درصد اثر معنی‌داری بر رنگ،pH  نهایی، شاخص­ افت حاصل از پخت و نیروی برش گوشت نداشتند. اسیدهای چرب اولئیک، پالمیتیک و استئاریک به ترتیب بشترین مقدار را در بین تمام اسیدهای چرب گوشت داشتند. جیره­های حاوی روغن سبب افزایش میزان اسیدهای چرب غیراشباع و کاهش اسیدهای چرب اشباع در بره­های تغذیه شده با روغن در مقایسه با تیمار شاهد شدند. بره­های تغذیه شده با روغن ماهی بالاترین میزان اسیدهای چرب ایکوزاپنتانوئیک، دوکوزاپنتانوئیک و دوکوزاهگزانوئیک را داشتند. افزودن روغن به طور موثر نسبت اسیدهای چرب امگا-6 به امگا-3 را در مقایسه با شاهد کاهش داد. نتیجه­گیری نهایی: افزودن منابع مختلف روغن به جیره دام، می‌تواند بدون اثرات منفی بر کیفیت گوشت، ترکیب اسیدهای چرب گوشت بره­ها را تحت تاثیر قرار ­دهد و به عنوان یک راهکار جهت افزایش اسیدهای چرب غیراشباع گوشت، بخصوص اسیدهای چرب امگا-3 و بهبود نسبت امگا-6 به امگا-3 استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of incorporation of canola, soybean and fish oils to the diet on fatty acid composition and quality of meat in fattening lambs

نویسندگان [English]

  • R Parvar
  • T Ghoorchi
  • M Shams
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