Effects of Different Levels of Fish Oil Supplementation on Performance of Broilers
محورهای موضوعی : Camelجی.ب. داس 1 , م.ای. حسین 2 , م.آ. اکبر 3
1 - Department of Animal Science and Nutrition, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Science University, Khulshi, Chittagong, Bangladesh
2 - Department of Animal Science and Nutrition, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Science University, Khulshi, Chittagong, Bangladesh
3 - Department of Animal Nutrition, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh, Bangladesh
کلید واژه: Broiler, carcass characteristics, feed conversion, feed intake, fish oil, weight gain,
چکیده مقاله :
Six hundred day old unsexed broiler chicks were used in a 42-d trial at Chittagong Veterinary and Animal Science University Poultry Farm to compare the effects of different levels of fish oil supplementation on performance of broilers in terms of feed intake, weight gain and feed conversion and carcass characteristics. The chicks were randomly distributed following a completely randomized design in four groups having three replications per group. Each group was composed of 150 chicks and 50 birds per replicate. Four diets were formulated using locally available ingredients as diet without oil, diets containing 2.5%, 3.0% and 3.5% fish oil. Results indicated that, supplementation of diets with different levels of fish oil significantly differed (P<0.05) feed intake at 1st, 3rd, 4th and 6th weeks of age. However, there was no significant (P>0.05) effect of fish oil supplementation on feed conversion up to 5th week of age. At the end of 6th week, feed conversion of the broilers of different dietary groups differed significantly (P<0.05). Similarly, no significant differences (P>0.05) were found among all dietary treatment groups in weight gain up to 3rd week of age except at later stages. Out of eighteen parameters, shank weight, heart weight, thigh bone weight and abdominal fat weight differed (P<0.05) due to supplementation of fish oil. It can be concluded that, supplementation of fish oil at 2.5% level results in the best cumulative feed intake and feed conversion of broilers.
ششصد جوجه گوشتی یکروزه مخلوط دو جنس برای مقایسه اثرات استفاده از سطوح مختلف مکمل روغن ماهی بر عملکرد جوجه‌های گوشتی در شرایط مصرف خوراک، افزایش وزن و ضریب تبدیل غذایی و خصوصیات لاشه به مدت 42 روز در مرغداری دانشگاه دامپزشکی و علوم دامی چیتاگونگ مورد استفاده قرار گرفتند. جوجه‌ها به طور تصادفی در قالب طرح کاملاً تصادفی در چهار گروه با سه تکرار در هر گروه توزیع شدند. هر گروه از 150 قطعه جوجه و 50 پرنده در هر تکرار تشکیل شده بود. چهار جیره غذایی با استفاده از مواد خوراکی محلی در دسترس به عنوان جیره غذایی بدون روغن، جیره‌های غذایی حاوی 5/2 درصد، 0/3 درصد و 5/3 درصد روغن ماهی فرموله شد. نتایج نشان داد که مکمل جیره‌های غذایی با سطوح مختلف روغن ماهی به طور معنی داری (05/0>P) تفاوت در مصرف خوراک در سن 1، 3، 4 و 6 هفته داشتند. با این حال، اثر مکمل روغن ماهی بر ضریب تبدیل خوراک تا سن 5 هفته معنی دار نبود (05/0P>). در پایان هفته 6، ضریب تبدیل خوراک جوجه‌های گوشتی از گروه‌های مختلف غذایی به طور معنی داری متفاوت بود (05/0>P) به طور مشابه، تفاوت معنی داری (05/0P>) در بین هیچکدام از گروه‌های غذایی در اضافه وزن تا سن 3 هفته به جز در مراحل بعدی مشاهده نشد. جدا از هجده پارامتر، وزن ساق پا، وزن قلب، وزن استخوان ران و وزن چربی شکمی با مصرف مکمل روغن ماهی متفاوت بود (05/0>P). می‌توان نتیجه گرفت که، افزودن مکمل روغن ماهی در سطح 5/2 درصد موجب بهترین مصرف تجمعی خوراک و ضریب تبدیل خوراک جوجه‌های گوشتی می‌شود.
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