نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته کارشناسی ارشد رشته تغذیه دام، گروه علوم دامی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی
2 استادیار گروه علوم دامی دانشکده دانشکده کشاورزی و منابع طبیعی ، دانشگاه محقق اردبیلی
چکیده
به منظور بررسی اثرات پروبیوتیک پریمالاک و پری‌بیوتیک فرماکتو به تنهایی و یا توأمان بر عملکرد رشد، قابلیت هضم ایلئومی مواد مغذی، ریخت‌سنجی مخاط روده و برخی فراسنجه‌های بیوشیمیایی خون، آزمایشی با استفاده از 256 قطعه جوجه گوشتی سویه تجارتی راس-308 در قالب یک طرح کاملاً تصادفی اجرا شد. چهار تیمار آنتی‌‌‌بیوتیک آویلامایسین (شاهد)، پریمالاک، فرماکتو و مخلوط پریمالاک و فرماکتو در چهار تکرار به جیره‌های پایه افزوده شده و به مدت 42 روز به جوجه‌ها تغذیه شد. استفاده از پریمالاک و فرماکتو با کاهش مصرف خوراک (01/0P<) موجب کاهش وزن جوجه‌ها شد (001/0P<). ضریب تبدیل غذایی در اثر مصرف جیره‌های حاوی پریمالاک بدتر شد (05/0P<). pH محتویات سنگدان و سکوم تحت تأثیر تیمارهای آزمایشی قرار نگرفت. قابلیت هضم ایلئومی انرژی توسط تیمارهای آزمایشی کاهش نشان داد (05/0P<). کاهش ارتفاع پرز ژژنوم در اثر پریمالاک و فرماکتو و افزایش عمق کریپت آن در اثر همه تیمارها مشاهده شد (01/0P<). استفاده از پریمالاک و فرماکتو و ترکیب این دو باعث کاهش کلسترول و کلسترول LDL (001/0P<) و مصرف این افزودنی‌ها به تنهایی موجب افزایش کلسترول HDLسرم خون جوجه‌های گوشتی شد (05/0P<). به‌طور کلی استفاده از پریمالاک و فرماکتو و یا ترکیب آنها در جیره، به جز کاهش سطح کلسترول سرم خون نتوانستند در مقایسه با آویلامایسین اثرات مشابهی بر عملکرد جوجه‌ها نشان دهند. از این‌رو نمیتوانند جایگزین خوبی برای این آنتی‌‌‌بیوتیک محرک رشد مطرح شوند. به علاوه بین پریمالاک و فرماکتو ویژگی سینبیوتیکی مشاهده نشد.
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