فهرس المقالات Ghezel ewes

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  1 - New Technique for Activating Reproductive System during Non-Breeding Season in Ghezel Ewes
  ب. قاسمی-پناهی س.ع. رافت م. ابراهیمی م.ح. اکبرزاده ر. حاجی‪علیزاده ولیلو
  Ghezel sheep is one of the main breeds in the north-west of Iran which is reared for meat, milk and wool production. Improving reproduction of this breed will have a significant impact on the economic development of local farmers. Therefore, in the present study the eff أکثر

  Ghezel sheep is one of the main breeds in the north-west of Iran which is reared for meat, milk and wool production. Improving reproduction of this breed will have a significant impact on the economic development of local farmers. Therefore, in the present study the effect of simultaneous use of estrus synchronization(controlled internal drug releasing(CIDR) and equine chorionic gonadotropin(eCG)) and flushing diet on reproduction during non-breeding season in Ghezel ewes was determined. A total of 114 three-year-old Ghezel ewes were equally divided into three treatment groups. Group 1 was synchronizing with CIDR and eCG and was flushed for 40 days. Group 2 was flushed only for 40 days and group 3, the control did not receive any treatment at all. Rams also received a flushing diet concurrent with ewes. CIDR application was performed for 12 days, following CIDR withdrawal, each of the group 1 ewes received an intramuscularly injection with 400 IU eCG. Thereafter, all ewes were introduced to the rams. Pregnancy was determined by ultrasound at 50 days after introduction to the rams. Lambing rate in group 1 was 276.32% and the pregnancy rate was 100%. This result was significantly different from group 2 and 3. Although a minor improvement in pregnancy percentage was observed in group 2 in comparison with control group, the overall results suggested that flushing alone was not effective in activating the reproductive system in non-breeding season. This study showed that estrus synchronization using CIDR and eCG accompanied with flushing diet was a suitable technique to improve lamb production during non-breeding season in Ghezel ewes. تفاصيل المقالة
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  2 - Effects of Organic and Inorganic Selenium Supplementation with Vitamin E during the Flushing Period on Reproductive Performance of Ghezel Ewes
  ح. دقیق‌کیا س. ساعدی ع. حسین‌خانی
  Minerals and vitamins play an important role in animal nutrition with beneficial effects on animal reproductive performance. To investigate this issue, 44 Ghezel ewes weighing 55± 2 kg (Mean±SD) and 2-3 years old were randomly divided into groups (n=11), t أکثر

  Minerals and vitamins play an important role in animal nutrition with beneficial effects on animal reproductive performance. To investigate this issue, 44 Ghezel ewes weighing 55± 2 kg (Mean±SD) and 2-3 years old were randomly divided into groups (n=11), to investigate the effect of the selenium and vitamin E supplementation on blood hormones and metabolites and possible reproductive performanceof Ghezel ewes. Treatments were consisted of group A: as control, B: flushing diet containing barley grain (73%), C: flushing diet + vitamin E (48 mg/day) + organic selenium (selenoproteins, 13.5 mg/day) and D: flushing diet + vitamin E (48 mg/day) + inorganic selenium (sodium selenite, 1.35 mg/day). The estrous cycles of the ewes were synchronized by application of a controlled internal drug release (CIDR) for 14 day. The results showed that the highest lambing rates (136.4%) and numbers of offspring (n=15) were in group C. Hormonal measurements including estrogen, progesterone and insulin revealed the relationship of these hormones with reproductive performance of ewes with the highest concentrations of estrogen and insulin (in estrus) and progesterone (in three weeks after mating) in groups C and D (P<0.05). Glucose and cholesterol levels of groups C and D increased significantly during the day prior to CIDR removal, estrus and three weeks after mating (P<0.05). Total protein and blood urea nitrogen (BUN) levels of B, C and D groups enhanced significantly in all times compared to the control group (P<0.05). Using inorganic and organic selenium in flushing diet had similar effects on blood metabolites and hormones related to reproductive performance. تفاصيل المقالة