اثر افزودن نمک های کلسیمی روغن پالم و روغن ماهی به جیره بر عملکرد، ویژگی های لاشه و کیفیت گوشت بره های نر مغانی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه علوم دامی، دانشکده کشاورزی و منابع طبیعی مغان، دانشگاه محقق اردبیلی

2 دانشیار، گروه علوم دامی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی

3 استادیار، گروه علوم دامی، دانشکده کشاوری، دانشگاه ارومیه

چکیده

هدف از مطالعه‌ حاضر بررسی اثر جیره­های حاوی نمک­های کلسیمی روغن پالم و روغن ماهی بر عملکرد، ویژگی­های لاشه و کیفیت گوشت بره­های پرواری مغانی‌ بود. تعداد 20 رأس بره‌ نر مغانی چهار تا پنج ماهه با میانگین وزن اولیه‌ 8/2±7/32 کیلوگرم به ‌طور تصادفی و بر اساس وزن اولیه به دو گروه آزمایشی (10n=) تقسیم و در جایگاه­های انفرادی قرار گرفتند. بره­ها با یکی از دو جیره 1) حاوی 5/2 درصد روغن پالم و 2) حاوی 5/2 درصد روغن ماهی به‌ مدت 90 روز تغذیه شدند. در انتهای آزمایش، بره­ها کشتار شده و خصوصیات لاشه و کیفیت گوشت آن‌ها مورد ارزیابی قرار گرفت. داده­ها بر اساس طرح کاملاً تصادفی و با استفاده از رویه‌ GLM نرم افزار SAS مورد تجزیه و تحلیل قرار گرفتند. نتایج نشان داد که نمک­های کلسیمی روغن‌های پالم و ماهی تأثیر معنی­داری بر عملکرد، خصوصیات لاشه و ترکیات شیمیایی ماهیچه راسته نداشتند. همچنین، میزان نیروی برش، درصد افت حاصل از پخت و کاهش وزن حاصل از شیرابه در ماهیچه راسته تحت تأثیر تیمارها قرار نگرفتند. گوشت بره­هایی که با روغن ماهی در مقایسه با روغن پالم تغذیه شده بودند از شدت بوی بیشتر (13/6 در مقابل 06/5) و کیفیت پایین‌تری (21/4 در مقابل 41/5) برخوردار بودند (05/0>P) و سایر خصوصیات حسی گوشت (تردی، آبداری و طعم) تحت تأثیر تیمارها قرار نگرفت. در کل، تغذیه 5/2 درصد نمک­های کلسیمی روغن ماهی بدون اثر بر عملکرد و ویژگی­های لاشه، از نظر افراد ارزیاب، بوی ماهی در گوشت مصرفی را افزایش داد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of dietary inclusion of Ca-salts of palm oil and fish oil on performance, carcass traits and meat quality of Moghani male lambs

نویسندگان [English]

  • V. Vahedi 1
  • N. Hedayat-Evrigh 2
  • H. Khalilvandi Behruzyar 3
1 Assistant Professor, Department of Animal Science, Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
2 Associate Professor, Department of Animal Science, Faculty of Agricultural & Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
3 Assistant Professor, Department of Animal Science, Faculty of Agriculture, University of Urmia, Urmia, Iran
چکیده [English]

The present study aimed to characterize the effect of dietary Ca-salts of palm oil (PO) and fish oil (FO) on performance, carcass characteristics, and meat quality of growing lambs. The lambs (n=20; IBW=32.7±2.8 kg, 4-5 month-old) were randomly assigned to one of two treatments (10 lambs/treatment) based on IBW and kept individual pens. Lambs were offered one of two diets, 1) control (2.5% PO) and 2) 2.5% FO for 90 days. At the end of the experiment, lambs were slaughtered and carcass characteristics and meat quality were measured. All data were analyzed based on a completely randomized design using the general linear model procedure of SAS. Results showed that Ca-salts of PO and FO did not affect animal performance, carcass traits, and chemical composition of Longissimus dorsi muscle (LDM). Also, shear force, cooking loose, and drip loose percentage of LDM did not affect by treatments. Feeding FO increased odor score (6.13 vs. 5.06) and decreased overall acceptability of meat (4.21 vs. 5.41) compared to PO (P<0.05), while the other sensory characteristics of meat (tenderness, flavor, and juiciness) were not affected by treatments. In conclusion, the feeding of 2.5% Ca-salts of FO increased the fishy odor in the lamb meat according to the sensory panel without changing the performance and carcass characteristics.

کلیدواژه‌ها [English]

  • Lamb
  • Carcass characteristics
  • Growth performance
  • Meat quality
  • Ca-salts of fish oil
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