نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه فردوسی مشهد
2 دانشگاه شیراز
چکیده
در این تحقیق، اثر جیرههای گلوژنیک و لیپوژنیک همزمان با یک برنامه همزمانی فحلی در جهت کاهش فاصله زایش و بهبود عملکرد شاخصهای تولیدمثلی با استفاده از 90 رأس میش نژاد بلوچی (در سه گروه ) مطالعه شد. میشهای هر گروه به ترتیب از سه جیره با نسبتهای متفاوت از منابع نشاسته و چربی تغذیه شدند. جهت همزمانی فحلی، میشها روز 30 آزمایش سیدرگذاری شدند. 14 روز بعد از سیدرگذاری، همزمان با برداشتن سیدر، 400 واحد هورمون eCG به همه میشها تزریق شد. به محض مشاهده علائم فحلی، میشها تلقیح شدند. آزمایش اولتراسونوگرافی جهت بررسی تعداد فولیکول گراف، جسم زرد و تشخیص آبستنی انجام شد. بعد از زایش نیز شاخصهای تولیدمثلی نظیر نرخ برهزایی و دوقلوزایی بررسی شدند. بیشتر میشهای مورد آزمایش به وضوح علائم فحلی را نشان دادند. اثر جیرههای آزمایشی بر تعداد فولیکولهای گراف معنیدار نبود. تعداد فولیکولهای گراف از زمان سیدربرداری تا فحلی به شکل معنیداری افزایش یافت. نرخ تخمکریزی، برهزایی و دوقلوزایی در میش‌هایی که جیرههای گلوکوژنیک و گلوکو+لیپوژنیک دریافت کردند بیشتر از میشهای تغذیه شده با جیره لیپوژنیک بود (05/0P<) .براساس نتایج این مطالعه، تغذیه منابع نشاستهای تنها و یا همراه با نسبتی کمی از منابع چربی، اثرگذاری روشهای همزمانی بر شاخصهای تولیدمثلی در گلههای میش بلوچی را بهبود می بخشد.
کلیدواژه‌ها
عنوان مقاله [English]
Comparing the effect of glycogenic and lipogenic diets on reproductive performance of Baluchi ewes contributed to an estrus synchronization method
چکیده [English]
The aim of this study was to compare the effect of glycogenic and/or lipogenic diets fed in Baluchi ewes treated with an estrus synchronization method to reduce delivery distance and improving reproductive parameters. Ninety heads of Baluchi ewes selected and randomly placed into three parallel groups. Each ewe of group was fed in with three different diets based on the fat and starch sources. In order to do the estrus synchronization, all ewes were put CIDR in 30 day of the trial. After 14 days, they were removed, then four hundred IU eCG hormone were injected. As soon as estrus signals was observed, ewes were inseminated. Ultrasonography was done to observe the number of dominant follicle, CL and pregnancy diagnosis. After parturition, reproductive parameters like lambing and twining rate were analyzed. The most of examined ewes showed clearly estrus signals. The consequence of ovary sonography did not indicate significant effect in average of dominant follicles numbers among the experimental diets. The number of dominant follicles was increased significantly from time of estrus to artificial insemination. Ovulation, pregnancy and twining rate were considerably (P< 0.05) higher in glycogenic and glycogenic+lipogenic rations compared with lipogenic ration. Generally, the feeding of starch source alone and or along with low proportion of fat sources might improve the effect of estrus synchronization on reproductive performance of Baluchi ewes.
کلیدواژه‌ها [English]
- CIDR
- Ewe
- Glycogenic
- Lipogenic
- reproduction
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