مقایسه اثر جیره های گلوکوژنیک و لیپوژنیک همراه با روش همزمان سازی فحلی بر عملکرد تولیدمثلی میش های بلوچی

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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