نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش‌آموخته کارشناسی ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران.
2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران
3 گروه علوم دامی، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران.
4 گروه علوم آزمایشگاهی و بالینی، دانشکده پیراپزشکی، دانشگاه ایلام، ایلام، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The present study was conducted to investigate the effect of injection of different levels of vitamin A before mating on plasma parameters, antioxidant status and reproductive performance of Afshari ewes. For this purpose, 75 adult Afshari ewes with almost similar conditions (age and BW) were randomly divided into 3 groups of 25 ewes/group. The experimental treatments included 1- control ewes (without vitamin A injection), 2 - ewes receiving 2.5 ml of vitamin A and 3- ewes receiving 5 ml of vitamin A. Vitamin A solution was injected subcutaneously on the day of sponge insertion and sponge removal. Body condition score (BCS), plasma metabolites and antioxidant status were measured at the beginning of the experiment, the day of sponge removal and the day of estrus. The results showed that injection of 5 ml of vitamin A before mating increased glucose concentration on the day of estrus compared to other treatments (P<0.05). Plasma malondialdehyde concentration on the day of sponge removal and the day of estrus was significantly reduced by injection of 2.5 and 5 ml of vitamin A compared to the control treatment (P<0.05). Lambing rate, fertility rate and twinning rate were not significantly affected by injection of 2.5 and 5 ml of vitamin A before mating (P< 0.05). In general, injection of vitamin A before mating may be an ideal strategy tp increase reproductive performance of Afshari ewes.
کلیدواژه‌ها [English]
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