تأثیر افزودن پودر برگ زیتون به جیره غذایی بر عملکرد، ریخت‌شناسی روده کوچک و قابلیت هضم مواد مغذی در جوجه‌های‌ گوشتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای علوم دامی (تغذیه طیور) واحد بین الملل دانشگاه فردوسی مشهد.

2 استاد دانشگاه فردوسی مشهد، تخصص: تغذیه طیور

3 استادیار مرکز تخقیقات و آموزش کشاورزی و منابع طبیعی استان فارس

4 استاد دانشگاه فردوسی مشهد، تخصص:تغذیه طیور

چکیده

تأثیر افزودن سطوح مختلف پودر برگ زیتون به جیره به‌عنوان آنتی‌اکسیدان طبیعی بر عملکرد تولیدی، خصوصیات ‌لاشه، برخی فراسنجه‌های خونی، ریخت‌شناسی روده ‌کوچک و قابلیت‌ هضم مواد مغذی در جوجه‌های‌گوشتی با استفاده از تعداد 300 قطعه جوجه‌گوشتی یکروزه سویه کاب500 در قالب طرح کاملاً تصادفی با پنج تیمار، سه تکرار و 20 قطعه جوجه در هر تکرار به مدت 42 روز مطالعه شد. جیره‌های آزمایشی شامل: جیره ذرت - سویا (شاهد منفی)، جیره پایه به همراه 250 میلی‌گرم درکیلوگرم آلفا توکوفریل‌استات (شاهد مثبت) و سه جیره به‌صورت جیره پایه با دو، 5/2 و سه درصد پودر‌برگ زیتون بودند. نتایج نشان داد افزایش وزن در گروه‌های دریافت‌کننده پودر برگ زیتون در کل دوره آزمایش کاهش معنی‌داری نسبت به گروه‌‌ شاهد ‌مثبت داشت (05/0>P). خوراک مصرفی در کل دوره کاهش معنی‌داری در گروه سه درصد پودر برگ زیتون در مقایسه با شاهد مثبت داشت (05/0>P). ضریب‌ تبدیل غذایی‌ در گروه‌های دریافت کننده پودر برگ زیتون در دوره آغازین، افزایش معنی‌داری نسبت به تیمار شاهد منفی و مثبت داشت (05/0>P). افزودن سطوح مختلف پودر برگ زیتون به جیره، طول پرز، عمق کریپت و سطح پرز را در مقایسه با گروه شاهد منفی یا مثبت بطور معنی‌داری افزایش داد (05/0>P). کاهش معنی‌داری در غلظت سرمی تری‌گلیسریدها، کلسترول و لیپوپروتئین با دانسیته پایین در تیمارهای پودر برگ زیتون در مقایسه با گروه شاهد منفی یا مثبت مشاهده شد (05/0>P). براساس نتایج حاصل افزودن پودر برگ زیتون تا سطح دو ‌درصد جیره جوجه‌های گوشتی به دلیل کاهش چربی‌خون و بهبود ریخت‌شناسی روده قابل توصیه می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Eeffect of dietary inclusion of olive leaf powder on performance, small intestine morphology and nutrient digestibility in broiler chickens

نویسندگان [English]

  • ahmad ali sabetan shiraze 1
  • Ahmad Hassanabadi 2
  • mohamad javad agah 3
  • hasan nasiri moghadam 4
1 PhD student Animal Science ( poultry nutrition ) International unit Ferdowsi University of Mashhad
3 Assistant Professor of Education and Agriculture and Natural Resources Research Center of Fars province
4 Professor Ferdowsi University of Mashhad , specialty : Poultry Nutrition
چکیده [English]

The effects of different dietary levels of olive leaf powder (OLP) as a natural antioxidant on growth performance, carcass traits, some blood parameters, small intestinal morphology and feed digestibility in broiler using a total of 300 one-day-old Cobb500 broilers were studied in a completely randomized design with 5 treatments, 3 replicates and 20 chicks for each replicate, up to 42d. The experimental diets included: corn-soybean meal basal diet (negative control), basal diet supplemented with 250 mg/kg of alpha-Tocopheryl acetate (positive control) and three basal diets containing 2, 2.5 and 3 percent OLP. The results showed that during total experimental period (1-42d), weight gain was decreased (P<0.05) in OLP received groups in comparison with positive control. Feed intake during 1-42d period was decreased (P<0.05) in group which was treated by 3 percent OLP in comparison with positive control group. In starter period, feed conversion ratio was increased (P<0.05) in all groups treated by OLP in comparison with negative and positive controls. Dietary inclusion of different levels of OLP increased (P<0.05) length of villi, crypt depth and villus surface in comparison with the negative or positive controls. A significant decrease (P<0.05) was observed in serum concentrations of the triglycerides, cholesterol and low-density lipoproteins in OLP treated groups in comparison with negative or positive controls. Based on the results, dietary inclusion of OLP up to 2 percent in the broiler diets is recommendable, because it reduces blood lipids and also improves intestinal morphology.

کلیدواژه‌ها [English]

  • blood lipids
  • broiler
  • feed conversion ratio
  • Intestine villi
  • Olive leaf
  • weight gain
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