نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی گروه علوم دامی-دانشکده کشاورزی و منابع طبیعی مغان- دانشگاه محقق اردبیلی - تخصص: فیزیولوژی رشد/ فی

2 دانشکده کشاورزی و منابع طبیعی مغان، دانشگاه محقق اردبیلی، اردبیل

3 هیأت علمی / دانشگاه محقق اردبیلی دانشکده کشاورزی و منابع طبیعی مغان

4 گروه علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

در مطالعه حاضر، امکان بهبود عملکرد تولیدمثلی میش­ها و وزن تولد بره­ها با استفاده از تزریق ویتامین E-سلنیوم در میش­های هم‌زمان شده فحلی با استفاده از 200 رأس میش نژاد مغانی در قالب طرح کاملاً تصادفی در دو گروه بررسی شدند. در گروه شاهد میش­ها در طول دوره هم‌زمان‏سازی فحلی هیچ مکملی را دریافت نکردند، اما در گروه دوم، میش­ها در روزهای اسفنج‏گذاری و اسفنج‏برداری پنج میلی‌لیتر ویتامین E-سلنیوم را به‌صورت تزریقی دریافت کردند. برای هم‌زمان‏سازی، میش­ها به‌مدت 14 روز اسفنج حاوی پروژسترون دریافت کردند و بعد از خارج‌نمودن اسفنج­ها، 400 واحد بین‌المللی هورمون گونادوتروپین کوریون اسب (eCG) دریافت کرده و دو روز بعد از آن با قوچ­ها جفت‌گیری کردند. بعد از زایش، شاخص­های تولیدمثلی در هر گروه محاسبه شدند. در هر گروه آزمایشی از تعداد 20 رأس میش در روزهای اسفنج­گذاری و سه هفته بعد از قوچ اندازی خون‏گیری انجام و برخی فراسنجه­های خونی اندازه­گیری شد. نرخ زایش، بره­زایی، راندمان تولید بره و نرخ دوقلوزایی در گروه شاهد کم‌تر از گروه­ تیمار بود (0/05>P). تفاوتی در وزن تولد بره­ها در دو گروه مشاهده نشد. میزان گلوکز و کلسترول سرم خون سه هفته بعد از جفت‌گیری، در میش­هایی که ویتامین E-سلنیوم دریافت کردند بالاتر بود (0/05>P). براساس نتایج حاصل، تزریق ویتامین E-سلنیوم در میش مغانی در زمان هم‌زمان­سازی فحلی، سبب بهبود عملکرد تولیدمثلی می­شود.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of vitamin E and Selenium injection on the reproductive performance, birth weight and some blood metabolites in estrus-synchronized Moghani ewes

نویسندگان [English]

  • Vahid Vahedi 1
  • Shahrooz Mabodi 2
  • Taher Yalchi 3
  • Mehdi Ansari 4

1 Department of Animal Science, Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

2 Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

3 Assistant Proressor / University of Mohaghegh Ardabili / Faculty of Agriculture and Natural Resources Moghan

4 Department of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

چکیده [English]

The aim of the current study was to improve the reproductive performance and birth weight of lambs using vitamin E and selenium (Ese) injection in estrus-synchronized Moghani ewes. In this research, a total of 200 Moghani ewes were divided into two groups in a completely randomized design. In the control group, only estrus synchronization was performed, but the second group was received two intramuscular injections of Ese (5 ml) on the days of sponging and sponge removal. Synchronization of estrus was done by inserting intravaginal sponges for 14 days followed by 400 IU eCG at sponge withdrawal. Two days after sponge withdrawal, ewes were joined with fertile rams. Twenty ewes from each group were selected randomly and their blood was sampled. The first and second blood samplings were done before inserting intravaginal sponges and three weeks after ram exposure, respectively. Then, some blood plasma metabolites were determined. After parturition, reproductive traits were calculated in each group. According to the results, lambing rate, fecundity rate, lamb production efficiency and twinning rate were higher in Ese group (88, 111, 126.1, 21.6 respectively) compared to control (73, 84, 112.3, 12.3 respectively). The birth weight of lambs did not significantly differ between the groups. Glucose and cholesterol concentration of blood were significantly higher in group receiving Ese three weeks after mating. In conclusion Ese injection improved the reproduction performance in Moghani ewes.

کلیدواژه‌ها [English]

  • Estrus synchronization
  • Moghani ewe
  • Pregnancy rate
  • Prolificacy
  • Vitamin Ese
خالداری، مجید (1390). اصول پرورش گوسفند و بز. چاپ چهارم. تهران: انتشارات جهاد دانشگاهی تهران.
 
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