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اثر شکل فیزیکی جیره های غذایی (آردی، پلت و اکسترود) بر بازده انرژی و پروتئین، مورفولوژی و جمعیت میکروبی روده جوجه‌های گوشتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی سابق دکتری، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان، ایران

2 استاد، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان، ایران

3 دانشیار مدیریت و پرورش طیور، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

4 دانشجوی سابق کارشناس ارشد، دانشکده کشاورزی، دانشگاه آزاد اسلامی کرج، ایران

چکیده

مطالعه حاضر با هدف تعیین اثر شکل خوراک (آردی، پلت و اکسترود) بر بازده انرژی و پروتئین، مورفولوژی و میکروبیولوژی روده در جوجه­های گوشتی انجام شد. بازده انرژی و پروتئین و شاخص بازده اروپایی در طول دوره آزمایش محاسبه گردید و مورفولوژی ژژونوم، طول نسبی روده، اسیدهای چرب فرّار، جمعیت میکروبی و ویسکوزیته محتویات ایلئوم روده در 42 روزگی تعیین شدند. نتایج نشان داد که اثر شکل خوراک بر مورفولوژی ژژونوم (عمق کریپت، ضخامت، ارتفاع و عرض پرز، نسبت ارتفاع پرز به عمق کریپت)، جمعیت میکروبی محتویات ایلئوم (باکتری­های اسپورزا، لاکتوباسیل، کلی­باسیل، باکتری­های هوازی کل)، طول نسبی روده و طول روده معنی­دار نبود (05/0<P). در خوراک آردی مقادیر ویسکوزیته و اسیدهای چرب فرّار (بوتیریک، ایزوبوتیریک، والریک، ایزووالریک) ایلئوم روده بیشتر و میزان pH و اسید چرب استیک در مقایسه با خوراک پلت و اکسترود کمتر بود (05/0>P). بازده انرژی و پروتئین و شاخص بازده اروپایی در کل دوره در تیمار اکسترود بالاتر از تیمار پلت و آردی بود. یافته­های مطالعه حاضر نشان داد که استفاده از خوراک اکسترود و پلت در مقایسه با تیمار آردی در جوجه‌های گوشتی دارای نتایج مثبت بر پروفایل اسیدهای چرب، ویسکوزیته محتویات روده، شاخص بازده اروپایی و بازده انرژی و پروتئین است.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of feed form (Mash, Pellet, Extrude) on energy and protein efficiency, morphology and microbial population of intestine in broiler chicken

نویسندگان [English]

  • Mahtab Azizian 1
  • Ali Asghar Saki 2
  • Mohammad Amir Karimi Torshizi 3
  • Saeideh Azimi 4
1 Former Ph.D. Student, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
2 Professor, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
3 Associate Professor, Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
4 Former M. Sc. Student, Department of Animal Science, Faculty of Agriculture, Islamic Azad University, Karaj, Iran
چکیده [English]

The current study was conducted to determine the effectof feed form (mash, pellet and extrude) on energy and protein efficiency, intestinal morphology and microbiology in broiler chickens. Energy and protein efficiency and European efficiency factor were calculated during the experiment period and jejunum morphology and relative length of intestine, microbial population, volatile fatty acids, viscosity of ileal were determined at 42 days of age. The results have shown that the effect of feed form on jejunum morphology (crypt depth (CD), serosa thickness, villous height (VH) and villous width (VW), VH:CD, length and relative length of intestine, microbial population (spore former bacteria, lactobacilli,colibacilli, total aerobic bacteria) of ileal digesta was not significant (P>0.05). The values of viscosity and volatile fatty acids (butyric, isobutyric, valeric, isovaleric) of ileal digesta was higher and values of pH, ascetic acid was lower in mash diet form in comparison to pellet and extrude diet form (P<0.05). Energy and protein efficiency and European efficiency factor were higher in extrudes diet form in comparison to mash and pellet feed forms in total experiment period (P<0.05). Our findings have shown that that extrusion and pellet feed forms had positive results on volatile fatty acid profile, intestinal contents’ viscosity, energy and protein efficiency and European efficiency factor in comparison to mash feed form in broiler chickens.

کلیدواژه‌ها [English]

  • Fatty
  • feed form
  • lactobacilli
  • pH
  • viscosity
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