دوره 9، شماره 20 - ( تابستان 1397 )                   جلد 9 شماره 20 صفحات 60-53 | برگشت به فهرست نسخه ها


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دانشکده کشاورزی و منایع طبیعی، دانشگاه اراک
چکیده:   (3152 مشاهده)
در پژوهش حاضر 30 رأس گاو شیری چند شکم‌زا  (با میانگین زایش 8/3) در دوره انتقال جهت بررسی اثر استفاده از
مکمل­ های موننسین، کروم و اثر مشترک آنها بر فراسنجه‌های خونی در قالب طرح کاملاً تصادفی با چهار تیمار استفاده شد. تیمارها شامل: 1) تیمار شاهد؛ 2) تیمار با مصرف موننسین (400 میلی‌گرم در روز)؛ 3) تیمار با مصرف کروم (03/0 میلی‌گرم در کیلوگرم وزن متابولیکی بدن) و 4) تیمار با مصرف کروم-موننسین (400 میلی‌گرم مکمل موننسین به همراه 03/0 میلی‌گرم به­ازای کیلوگرم وزن متابولیکی بدن). فراسنجه ­های خونی شامل آنزیم‌های کبدی (آلکالین فسفاتاز و آسپارتات آمینو ترانسفراز)، گلوکز، هورمون انسولین، پروتئین کل، آلبومین و بتاهیدروکسی بوتیرات (
BHBA) مورد بررسی قرار گرفتند. نتایج نشان داد که غلظت فراسنجه‌های سرم خون (به جز BHBA و گلوکز) تحت‌تأثیر جیره‌­های آزمایشی قرار نگرفتند (05/0<p). غلظت  BHBAدر گاوهای دریافت‌کننده کروم، کروم-موننسین در زمان قبل از زایش نسبت به جیره شاهد کاهش معنی‌داری نشان دادند (05/0p<). غلظت گلوکز در گاوهای دریافت‌کننده موننسین در زمان قبل از زایش نسبت به جیره شاهد افزایش معنی‌داری نشان دادند (05/0p<). بر اساس نتایج این آزمایش نشان داده شده است که در صورت مصرف جیره دارای ترکیب مشترک موننسین به همراه کروم می­ تواند تأثیر مثبت در بهبود سوخت ­و ­­ساز  گلوکز و وضعیت انرژی در دوره پا به ماه در گاوهای چند شکم زا داشته باشد.
 

 
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نوع مطالعه: پژوهشي | موضوع مقاله: فیزیولوژی
دریافت: 1397/1/24 | ویرایش نهایی: 1397/7/11 | پذیرش: 1397/2/23 | انتشار: 1397/7/11

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