Effects of Different Fat Sources in Finisher Diet of Broiler Chickens on Performance, Fat Deposition and Blood Metabolites
محورهای موضوعی : Camelس.ع. میرقلنج 1 , ا. گلیان 2 , م.ع. بهروزلک 3 , س. مرادی 4
1 - null
2 - Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
3 - Department of Animal Science, Faculty of Agriculture, Urmia University, Urmia, Iran
4 - Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
کلید واژه: growth performance, broiler chickens, blood metabolites, fat deposition, fatty acid sources,
چکیده مقاله :
The aim of this experiment was to assess the effects of using saturated fatty acid (SFA) and some unsaturated fatty acid (UFA) sources in finishing period on performance, fat deposition and blood metabolites of broiler chickens. One hundred and forty four 28-d old male broiler chickens were randomly assigned to 4 treatments and 6 replicates in a completely randomized design. Four isocaloric/isonitrogenous diets containing 5% tallow fat (TF) as SFA source or olive oil (OO), soybean oil (SO) and canola oil (CO) as UFA sources were provided during finisher period (from 29-42 d of age). Average daily feed intake (ADFI) and average daily weight gain (ADWG) of birds fed TF were significantly (P<0.05) lower as compared to birds fed vegetable oils in finisher diet. Abdominal fat percentage of birds fed TF and OO increased significantly (P>0.05) as compared to those fed SO and CO from 29-42 d of age. Relative weight of bile sac in birds fed TF diet, were significantly (P<0.05) higher than birds fed vegetable oils in finisher diets. Blood serum triglyceride of birds fed SO and CO was significantly (P<0.05) lower than birds fed TF at 42 d of age. The high density lipoprotein (HDL) of birds was significantly (P<0.05) reduced with feeding SO and CO compared to birds fed TF. These data suggest that performance, abdominal fat pad, relative weight of bile sac and some blood serum metabolites may be changed by modification of dietary fat sources, 14 days prior to slaughter.
این آزمایش به منظور بررسی اثرات منابع اسیدهای چرب اشباع و غیر اشباع در جیره پایانی بر عملکرد، ذخایر چربی بدن و متابولیت‌های سرم خون جوجه‌های گوشتی انجام گرفت. این آزمایش با استفاده از 144 پرنده 28 روزه سویه تجاری راس (308) در قالب طرح کاملاً تصادفی با 4 تیمار و 6 تکرار انجام شد. چهار تیمار جیره‌ای در این تحقیق شامل: سطوح 5 درصد از چربی پیه به عنوان منبع چربی اشباع و روغن زیتون، روغن کنجاله سویا و روغن کانولا به عنوان منابع چربی غیر اشباع بودند که در طول دوره پایانی پرورش جوجه‌های گوشتی از سن 29 تا 42 روزگی مورد استفاده قرار گرفتند. استفاده از چربی پیه در این آزمایش، مقادیر میانگین مصرف خوراک و میانگین افزایش وزن بدن را در مقایسه با روغن‌های گیاهی بطور معنی‌داری کاهش داد (05/0<P). میزان چربی محوطه شکمی در پرندگانی که چربی پیه و روغن زیتون را مصرف کرده بودند در مقایسه با پرندگانی که روغن کنجاله سویا و روغن کانولا را مصرف کردند افزایش معنی‌داری نشان داد (05/0<P). در طی دوره پایانی، جوجه‌های تغذیه شده با جیره حاوی چربی پیه نسبت به سایر تیمارها وزن نسبی کیسه صفرا بالاتری داشتند (05/0<P). میزان لیپوپروتئین با چگالی بالا (HDL) و تری‌گلیسرید سرم خون جوجه‌های گوشتی در سن 42 روزگی با مصرف روغن سویا و روغن کانولا در مقایسه با چربی پیه کاهش معنی‌داری را نشان دادند (05/0<P). این نتایج نشان می‌دهد که مقادیر عملکرد، چربی محوطه شکمی، وزن نسبی کیسه صفرا و برخی متابولیت‌های سرم خون جوجه‌های گوشتی ممکن است با تغییر منابع چربی جیره در حدود 14 روز قبل از کشتار تغییر یابند.
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