تأثیر سطوح جیره‏ای اسانس نعناع فلفلی بر شاخص‏های تولید و پاسخ ایمنی در مرغ‏ تخمگذار تحت تنش القاء شده با دگزامتازون

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه لرستان، خرم آباد، ایران

2 دانشگاه لرستان، تخصص: تغذیه و مدیریت طیور

3 عضو هیات علمی/دانشگاه لرستان

چکیده

این تحقیق با هدف بررسی تأثیر سطوح جیره‏ای اسانس نعناع فلفلی بر عملکرد تولیدی و پاسخ ایمنی در مرغ‏های تخم‏گذار تحت تنش القاشده با تزریق دگزامتازون انجام گرفت. آزمایش به‏صورت فاکتوریل 3×2 در قالب طرح بلوکهای‏ کامل تصادفی با تعداد 90 قطعه مرغ تخمگذار سویه های‏لاین (36W) در شش تیمار و پنج تکرار (شامل سه قطعه پرنده در هر قفس) اجرا شد. اسانس نعناع فلفلی در سطوح صفر، 200 و 400 میلی‏گرم در کیلوگرم به جیره پایه افزوده شد. دگزامتازون در دو سطح صفر و چهار میلی‏گرم در هفته بهازای هر مرغ  بهصورت زیرجلدی تزریق شد. تزریق دگزامتازون سبب کاهش درصد تولید، تولید تودهای تخم، افزایش وزن بدن پرندگان و همچنین افزایش معنیدار شمارش ائوزینوفیل­های خون، ضریب تبدیل و غلظت پروتئین تام خون در مقایسه با پرندگان شاهد شد (05/0P<). وزن زرده تخم برای مرغهای تغذیهشده با جیره حاوی 200 میلیگرم اسانس نعناع فلفلی بیشتر از مرغهای شاهد بود (05/0P<). عیار آنتی‏بادی علیه ویروس نیوکاسل، آنفلوانزا و گامبرو تحت تأثیر تزرق دگزامتازون، سطوح جیرهای اسانس نعناع فلفلی و اثر متقابل این دو قرار نگرفت. بهطورکلی، تنش فیزیولوژیک ناشی از تزریق دگزامتازون اثرات منفی بر ضریب تبدیل و تولید تخم در مرغ‏های تخم­گذار دارد و افزودن اسانس نعناع فلفلی به جیره‏ غذایی می‏تواند برخی از این اثرات منفی مانند وزن تخم‏مرغ را تا حدودی بهبود بخشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of dietary inclusion of peppermint essential oils on productive performance and immune response in laying hen imposed to dexamethasone-induced stress

نویسندگان [English]

  • Sajedeh Shamsollahei 1
  • Leila Hassanvand 1
  • bahman parizadian 3
1 Department of Animal Science, Agriculture Faculty, Lorestan University, Khorramabad, Iran
3 Department of Animal Science, Lorestan University
چکیده [English]

This study was conducted to evaluate the effects of dietary inclusion of peppermint essential oils (PEO) on productive performance and immune response in laying hens imposed to dexamethasone-induced stress. The experiment was performed in a 2×3 factorial arrangement in a randomized complete block design with 90 Hy- Line (W36) laying hens in 6 treatments and 5 replicates of 3 birds in each. Peppermint essential oil was included into a basal (control) diet at 200 and 400 mg/kg. Dexamethasone was injected subcutaneously in two levels of 0 and 4 mg per bird/ week. Dexamethasone injection decreased egg production, egg mass and body weight gain while increased feed conversion ratio, eosinophil count and serum total protein concentration compared with control birds (P < 0.05). Egg yolk weight was greater in birds fed with diets containing 200 mg/ kg PEO compared with control birds (P < 0.05). Dexamethasone, peppermint essential oil as well their interaction exhibited no significant effect on antibody titer against Newcastle, Influenza and Gambro viruses (P > 0.05). In conclusion, dexamethasone-induced stress exhibited an adverse impact on feed conversion ratio and egg production in laying hens and inclusion of PEO at 200 mg/ kg modulated, in part, certain negative effects including egg weight of hens.

کلیدواژه‌ها [English]

  • Dexamethasone
  • Immune responce
  • Laying Hen
  • Peppermint
  • Physiological Stress
  • Productive performance
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