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تأثیر سطوح مختلف پروتئین جیره و نانویاور (نانوادجوانت) بر عملکرد، ویژگی‌های لاشه و پاسخ ایمنی جوجه‌های گوشتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، گروه علوم دامی، دانشگاه گیلان، رشت، ایران

2 دانشیار، گروه علوم دامی، دانشگاه گیلان، رشت، ایران

چکیده

این آزمایش به مدت 42 روز با استفاده از 240 قطعه جوجۀ گوشتی یک‌روزۀ سویۀ راس 308، در قالب آزمون فاکتوریل 2×3 با سه سطح پروتئین (پایین، متوسط و بالا) و دو سطح نانو­یاور (حاوی نانویاور و بدون آن) با شش تیمار و چهار تکرار و ده قطعه جوجه در هر تکرار در قالب یک طرح کامل تصادفی انجام شد. اثرگذاری اصلی سطح پروتئین جیره در دورۀ آغازین و رشد بر خوراک مصرفی معنی­دار بود (05/0P<). در رابطه با افزایش وزن روزانه نیز تنها اثرگذاری اصلی سطح پروتئین جیره در دورۀ آغازین، رشد و کل دوره معنی­دار شد (01/0P<). در مورد ضریب تبدیل خوراک هم تنها اثرگذاری اصلی سطح پروتئین جیره در دورۀ آغازین معنی­دار بود (01/0P<). اثر اصلی سطح پروتئین جیره برای وزن نسبی (درصد از وزن زنده) لاشه، ران، میزان چربی حفرۀ شکمی و بورس معنی­دار بود (05/0P<). از نظر عیار پادتن (تیتر آنتی­بادی) علیه SRBC، در 28 روزگی اثر اصلی سطح پروتئین جیره و نانو­یاور بر عیار پادتن تام، IgG و IgM معنی­دار بود (05/0P<). سامانة ایمنی یاخته‌ای در پاسخ به تزریق PHA-P تحت تأثیر تیمارها قرار نگرفت. به‌عنوان نتیجه­گیری کلی، جیره­های با سطوح بالای پروتئین توان بیشتری را به‌منظور بهبود عملکرد تولیدی و ایمنی جوجه­ها در مقایسه با جیره‌های با سطوح متوسط و پایین از خود نشان دادند. افزون بر این، وجود نانو­یاور منجر به تحریک پاسخ ایمنی هومورال جوجه­های گوشتی شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of protein density and nano-adjuvant on performance, carcass characteristics and immune response of broiler chickens

نویسندگان [English]

  • Fatemeh Aziz Ali-Abadi 1
  • Hassan Darmani Kuhi 2
  • Mehrdad Mohammadi 2
1 Former M. Sc. Student, Department of Animal Science, College of Agricultural Science, University of Guilan, Rasht, Iran. P.O.Box: 58643-41889
2 Associate Professor, Department of Animal Science, College of Agricultural Science, University of Guilan, Rasht, Iran. P.O.Box: 58643-41889
چکیده [English]

An experiment was conducted on 240 one-day old Ross 308 broiler chicks using a completely randomized design in a 2×3 factorial arrangement with two levels of nano-adjuvant (with and without) and three levels of dietary protein (low, medium and high) during a 42 d experimental period. The main effect of protein density on feed intake was significant during the starter and grower periods (P<0.05). With regard to body weight gain, the main effect of protein density was significant in the starter, grower and whole experimental periods (P<0.01). Among the main and interaction effects, only the main effect of protein density on feed conversion ratio in the starter period was significant (P<0.01). The effect of protein density was also significant on the relative weights of carcass, legs, abdominal fat pad and bursa of Fabricius (P<0.05). The main effects of the protein density and nano-adjuvant for total anti-SRBC and IgG titers were significant at day 28 (P<0.05). Cell immunity in response to PHA-P injection was not affected by the factors. As an overall conclusion, diets with high protein density showed a better ability in improving the performance and immune response of broiler chicks compared to the diets with medium and low protein density. Also, the results showed some advantages for nano-adjuvant in humoral immune response stimulation.

کلیدواژه‌ها [English]

  • carcass characteristics
  • immune response
  • nano-adjuvant
  • performance
  • protein density
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