بررسی اثرات استفاده از گیاهان داروئی، پری بیوتیک، پروبیوتیک و آنتی بیوتیک بر عملکرد و سیستم ایمنی جوجه های گوشتی

نویسندگان

1 دانشجوی کارشناسی ارشد دانشگاه تربیت مدرس

2 دانشیار گروه پرورش و تولید طیور دانشکده کشاورزی دانشگاه تربیت مدرس

3 استادیار گروه پژوهش و تولید دانشکده کشاورزی دانشگاه تربیت مدرس

چکیده

این آزمایش به منظور بررسی اثرات افزودنی های غذایی بر عملکرد جوجه های گوشتی، با استفاده از 288 قطعه جوجه گوشتی نر یک روزه سویه تجاری ”کاب 500“ با وزن متوسط 5 ± 45 گرم در قالب طرح کاملا تصادفی با 6 تیمار، 4 تکرار و 12 قطعه جوجه گوشتی در هر تکرار انجام شد. گروه های آزمایشی شامل شاهد (بدون افزودنی غذایی) , آنتی بیوتیک (Virginiamycin15 ppm) مخلوط تجاری گیاهان داروئی (Digestarom450 ppm)، پروبیوتیک (Protexin ppm 100)، پری بیوتیک (Immunowall)درصد 0/1 و پروبیوتیک (Protxin100 ppm) + پری بیوتیک (Immunowall 1/0 درصد) بودند. مواد افزودنی به جیره پایه افزوده شدند. تلفات بصورت روزانه ثبت گردید و وزن بدن، خوراک مصرفی و ضریب تبدیل غذایی به صورت هفتگی اندازه گیری شد. به منظور تعیین اثر احتمالی تیمارها در پاسخ آنتی بادی نسبت به تزریق پادگن گلبول قرمز گوسفند در 21 و 35 روزگی تزریق پادتن و در دو نوبت (27 و 41 روزگی) خونگیری صورت گرفت و همچنین کلسترول سرم در دو نوبت (27 و 41 روزگی) اندازه گیری شد. وزن بدن در دوره آغازی و رشد، خوراک مصرفی در هر سه دوره، ضریب تبدیل غذایی در دوره رشد، درصد تلفات، وزن نسبی بورس و طحال و پاسخ ایمنی اولیه تحت تاثیر تیمارهای آزمایشی قرار نگرفت. ضریب تبدیل غذایی در دوره آغازی در گروه های آزمایشی آنتی بیوتیک و گیاهان داروئی، و در کل دوره در گروه آزمایشی پری بیوتیک و آنتی بیوتیک بهبود معنی داری را در مقایسه با سایر گروه های آزمایشی نشان داد. استفاده از پری بیوتیک در جیره سبب بهبود معندی دار پاسخ ایمنی ثانویه در قیاس با گروه مصرف کننده آنتی بیوتیک شد. افزودن آنتی بیوتیک به جیره سبب افزایش معنی دار کلسترول سرم خون 27 و 41 روزگی شد. نتایج تحقیق حاضر نشان می دهد که افزودن پری بیوتیک به جیره جوجه های گوشتی همانند آنتی بیوتیک تاثیر معنی داری بر ضریب تبدیل غذایی در 42 روزگی دارد و پری بیوتیک ها می توانند جایگزین مناسبی برای آنتی بیوتیک های محرک رشد باشند. 

عنوان مقاله [English]

The effect of eٍssential oil, prebiotic, probiotic and antibiotic on performance and immune response of broilers chickens.

نویسندگان [English]

  • M.A Alizadeh 1
  • F Shariatmadari 2
  • M.A Karimi 3
1 MSc Student Tarbiat Modarres University. Tehran. Iran
2 Associate Professor of Animal Science Department, Agricultural College, Tarbiat Modarres University. Tehran. Iran.
3 Assiatant Professor of Animal Science Department, Agricultural College, Tarbiat Modarres University. Tehran. Iran.
چکیده [English]

In this research, we investigated the effects of medicinal plants, prebiotic and probiotic as alternatives to antibiotics on the growth performance, immune response and blood cholesterol in broilers. A total of 288 one- day-old broiler chicks (Cobb 500) were randomly assigned to 6 treatments and replicated 4 times with 12 chicks per pen in a completely randomize design experiment in 6 wk. Diet 1 was a negative control containing no antibiotics or growth promoters (NC). Diet 2 was the positive control consisting of NC plus an antibiotic (15 ppm Virginiamycin). Diet 3 was NC and a blend of medicinal plants (450 ppm Digestarom). Diet 4 was NC to which probiotic (100 ppm Protexin) was added. Diet 5 was NC plus prebiotic (0.1 % Immunowall). Diet 6 was NC plus a combination of probiotic (100 ppm Protexin) and prebiotic (0.1 % Immunowall). The mortality rate and survival percentage were determined daily. Body weight gain, feed intake and feed conversion ratio (FCR) were measured weekly. Immune response against sheep red blood cells (SRBC) and blood cholesterol were measured in d 27 and 41. Body weight gain in the starter and grower period, feed intake in neither of periods, FCR in the grower period, bursa fabricius and spleen relative weight, primary immune response against SRBC were unaffected by dietary supplementation of experimental treatments . The FCR was significantly improved during the starter period in broilers fed antibiotic and medicinal plants, and during total period in broiler fed antibiotic and prebiotic as compared to broilers receiving other treatments. Feeding prebiotic increased secondary immune response against SRBC compared with antibiotic group. Serum total cholesterol in d 27 and 41 was significantly increased in broilers supplemented with antibiotic as compared to other groups. The results demonstrated that addition of the prebiotic to the feed as well as antibiotic had a significant effect on FCR at 42 days of age and might be used as suitable alternative to antibiotic.

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