اثر جنس و یونیفرها بر عملکرد رشد و خصوصیات لاشه بره‪های نژاد مغانی

Subject Areas : Camel

س. صادقی ¹ (Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
س.ع. رافت ² (Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran)
ج. شجاع ³ (Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran)
ح. امانلو ⁴ (Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran)

Received: 2015-01-12 Accepted : 2015-05-31 Published : 2016-03-01

Keywords: خصوصیات لاشه, عملکرد رشد, دنبه, چربی داخلی, گوسفند مغانی,

Abstract :

آزمایشی به منظور بررسی اثر جنس و دو نوع جیره غذایی حاوی یونیفرم بر عملکرد رشد و خصوصیات لاشه در گوسفندان مغانی انجام گرفت. 30 رأس بره مغانی (15 نر و 15 ماده) به طور تصادفی در 30 قفس انفرادی توزیع شدند. گروه جنسی شامل 5 رأس حیوان و با سه جیره غذایی شامل جیره پایه بدون مکمل، جیره پایه بعلاوه 25 میلی­گرم در کیلوگرم موننسین و جیره پایه بعلاوه 25 گرم در کیلوگرم لاسالوسید تغذیه شدند. بره‪ها بعد از یک دوره پروار 134 روزه توزین و برای تعیین خصوصیات لاشه مورد کشتار قرار گرفتند. میانگین وزن لاشه به طور معنی‪داری متأثر از جنس بود (01/0>P)، اما تحت تأثیر نوع جیره غذایی قرار نگرفت. جنس حیوان و نوع جیره غذایی اثر معنی‪داری بر میانگین وزن روزانه حیوان نداشت(05/0<P). بره­های تغذیه شده با جیره حاوی موننسین دارای کمترین مصرف خوراک و ضریب تبدیل غذایی بوده و تفاوت معنی‪داری با بره­های تغذیه شده با سایر گروه­های غذایی داشتند. میانگین چربی داخلی در بره­های ماده به طور معنی‪داری بیشتر از بره­های نر بود (01/0>P). وزن دنبه کاهش معنی‪داری در گروه­های مصرف کننده­ یونیفرها نسبت به گروه شاهد داشت (05/0>P). نرها نسبت به ماده‪ها عملکرد رشد بالاتری به علت وجود احشاء داخلی سنگین­تر و قطعات لاشه با ارزش بالا داشتند. جیره حاوی موننسین می­تواند به عنوان یک افزودنی غذایی مفید برای بهبود بازده غذایی و کاهش چربی داخلی و اجزای زاید لاشه مورد استفاده قرار گیرد.

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