تعیین تراکم و ضرایب قابلیت هضم حقیقی اسیدهای آمینة پودر گوشت و استخوان در خروس‌های بالغ لگهورن سکوم‌برداری‌شده

نوع مقاله : مقاله پژوهشی


1 دانشیار گروه علوم دامی دانشکدة کشاورزی دانشگاه تبریز

2 استاد، دانشکدة کشاورزی دانشگاه فردوسی مشهد

3 استاد گروه علوم دامی دانشکدة کشاورزی دانشگاه صنعتی اصفهان


 تراکم اسیدهای آمینة 6 نمونه پودر گوشت و استخوان به روش کروماتوگرافی تبادل یونی و قابلیت هضم حقیقی اسیدهای آمینه به روش تغذیة دقیق سیبالد تعیین شد. متیونین با 35/0 و لوسین با 29/2 درصد کمترین و بیشترین مقدار اسیدهای آمینه را در بین نمونه‌های پودر گوشت و استخوان نشان دادند. میانگین مقادیر هریک از اسیدهای آمینه، مجموع اسیدهای آمینة ضروری و غیرضروری و کل اسیدهای آمینه از مقادیر مشابه در جدول‌های NRC (1994) کمتر بود. نتایج نشان داد که به جز متیونین و پرولین، ضرایب قابلیت هضم حقیقی هر یک از اسیدهای آمینه، کل اسیدهای آمینة ضروری، غیرضروری، اسیدهای آمینة گوگرددار و کل اسیدهای آمینه تفاوت معنا‌داری بین نمونه‌های پودر گوشت و استخوان نشان ندادند. میانگین ضریب قابلیت هضم حقیقی اسید آمینة سیستئین و آرژنین معادل 7/73 و 4/89 درصد بود که به ترتیب کمترین و بیشترین مقدار را در بین اسیدهای آمینة پودر گوشت و استخوان نشان داد. گرچه ضرایب قابلیت هضم اسیدهای آمینة پودر گوشت و استخوان در سطح بالایی قرار داشت، اما به دلیل کم‌بودن تراکم اسیدهای آمینه، از سطح اسیدهای آمینة قابل هضم کمتری برخوردار بود.


عنوان مقاله [English]

Determination of meat and bone meal's amino acid content and their true digestibility coefficients in Legharn ceceltomized roosters

نویسندگان [English]

  • Hossein Janmohammadi 1
  • Hassan Nassiri Moghadam 2
  • Abolgasem Golian 2
  • Javad Pour Reza 3
  • Mohsen Danesh Mesgaran 2
1 Associate Professor, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2 Professor, Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
3 Professor, Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

Amino acid (AA) content of six meat and bone meal (MBM) samples was determined by ion-exchange chromatography. True AA digestibility of amino acids were determined of using precise sibbald's feeding method. Metionin and Lucien, with averages of 0.35 and 2.29 percent, had the lowest and highest values among essential AA of MBM samples. Average content of individual AA, sum of essential and non-essential AA and sum of AA values were lower than the corresponding values in NRC (1994). Individual digestibility values of AA, sum of essential and non-essential AA, Sulfur AA and sum of AA were not significant different among MBM samples Except Met and Pro (p<0.05). Average digestibility values of Cys and Arg were 73.7 and 89.4 percent which were respectively the lowest and highest AA digestibility values among MBM samples. It was concluded that AA digestibility values of MBM samples were at high levels but due to their low content MBM samples, their digestible AA content values were at low levels.

کلیدواژه‌ها [English]

  • Amino acid
  • true digestibility
  • sibbald feeding method
  • metionin
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