نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران. رایانامه: soheila.ebrahimi@birjand.ac.ir

2 نویسنده مسئول، گروه علوم دامی، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران. رایانامه: hfathi@birjand.ac.ir

3 گروه علوم دامی، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران. رایانامه: hfarhangfar@birjand.ac.ir

10.22059/jap.2024.372231.623780

چکیده

اثر خوراندن گلبرگ زعفران بر عملکرد، شاخص­های خونی و وضعیت آنتی­اکسیدانی خون و گوشت بره‌های نر افشاری با استفاده از 18 راس بره نر افشاری چهار تا پنج ماهه با میانگین وزن اولیه 5/2±17 کیلوگرم در قالب طرح کاملاً تصادفی بررسی شد. جیره­های آزمایشی شامل 1- شاهد، فاقد گلبرگ زعفران، 2- حاوی 5/1 درصد گلبرگ زعفران و 3- حاوی سه درصد گلبرگ زعفران (براساس ماده خشک) بودند. دوره آزمایشی 84 روز بود و در پایان دوره بره‌ها کشتار شدند. نتایج نشان داد که افزودن گلبرگ زعفران به جیره، اثری بر مصرف خوراک، افزایش وزن روزانه و قابلیت هضم مواد مغذی نداشت. مقدار اوره پلاسما در بره‌های تغذیه‌شده با هر دو سطح گلبرگ زعفران و مقدار گلوکز، کلسترول و تری‌گلیسرید پلاسما در بره‌های تغذیه‌شده با سه درصد گلبرگ زعفران کاهش یافت (05/0>P). در بره‌های تغذیه‌شده با سه درصد گلبرگ زعفران، ظرفیت آنتی­اکسیدانی کل و میزان فعالیت آنزیم گلوتاتیون پراکسیداز خون و ماهیچه افزایش و میزان مالون­دی­آلدهید خون و ماهیچه کاهش یافت (05/0>P). اما میزان فعالیت آنزیم سوپراکسید دیسموتاز در خون تحت تأثیر قرار نگرفت. در کل، نتایج این پژوهش نشان داد که افزودن سه درصد گلبرگ زعفران به جیره بره‌های پرواری بدون تأثیر بر عملکرد، سبب بهبود وضعیت آنتی‌اکسیدانی خون و افزایش ماندگاری گوشت بره‌ها می‌شود. 

کلیدواژه‌ها

عنوان مقاله [English]

The effect of feeding saffron petal on performance and antioxidant status of blood and meat of Afshari male lambs

نویسندگان [English]

  • Soheila Ebrahimi 1
  • Mohammad Hassan Fathi Nasri 2
  • Homayoun Farhangfar 3

1 Department of Animal Science, College of Agriculture, University of Birjand, Birjand, Iran. E-mail: soheila.ebrahimi@birjand.ac.ir

2 Corresponding Author, Department of Animal Science, College of Agriculture, University of Birjand, Birjand, Iran. E-mail: hfathi@birjand.ac.ir

3 Department of Animal Science, College of Agriculture, University of Birjand, Birjand, Iran. E-mail: hfarhangfar@birjand.ac.ir

چکیده [English]

Introduction: Today, animal nutritionists and experts are looking for solutions to produce high quality animal products. In lamb meat, post-mortem biochemical changes, such as lipid oxidation, lead to off-odours and flavour development that have negative impact on the shelf life of these products. Therefore, the possibility to extend the shelf life of lamb meat is a primary objective of the meat industry. Some of plant compounds are excellent source of natural antioxidants that can improve the shelf life and quality of meat mainly by inhibiting fat oxidation and microbial growth. Saffron petal (SP) is one of the by-products of saffron, which is a plant source rich in flavonoid compounds and anthocyanins, and annually large amounts of it discard as a waste product. Also, the use of these residues in animal feed, cause the reduction of environmental pollution. Therefore, the aim of this research was to investigate the effect of feeding of SP on performance, blood parameters and antioxidant status of blood and meat of Afshari fattening lambs.
Materials and methods: Eighteen male Afshari lambs aged four to five months with an average initial weight of 17±2.5 kg in a completely randomized design were used. Experimental treatments were included: 1) control (basal diet without SP), 2) basal diet supplemented with 1.5% SP and 3) basal diet supplemented with 3% SP (DM basis). The experimental period was 84 days and lambs were slaughtered at the end of the experiment.
Results and discussion: The results showed that the addition of SP to the diet had no effect on feed intake, daily weight gain and nutrient digestibility. The amount of plasma urea in lambs fed with both levels of SP and the concentration of plasma glucose, cholesterol and triglyceride in lambs fed with 3% of SP significantly decreased (P<0.05). In lambs fed with 3% SP, the total antioxidant capacity and activity of glutathione peroxidase enzyme in blood and longissimus lumborum (LL) muscle was increased and the amount of malondialdehyde in the blood and LL muscle was decreased (P<0.05). But the activity of superoxide dismutase in the blood was not affected.
Conclusion: Overall, the results of this research showed that adding 3% of SP to the diet of fattening lambs without affecting the performance, improved the antioxidant status of the blood and increased the shelf-life durability of meat.

کلیدواژه‌ها [English]

  • Afshari lamb
  • Antioxidant capacity
  • Meat oxidation
  • Saffron petal
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