ارزیابی اثرات سطوح مختلف پروتئین خام بر قابلیت جوجه درآوری، وزن جوجه و پاسخ های ایمنی مرغان بومی خراسان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار تغذیه طیور، مرکز تحقیقات کشاورزی و منابع طبیعی خراسان رضوی

2 کارشناس ارشد تغذیه طیور، گروه علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

این آزمایش به منظور بررسی اثرات سطوح مختلف پروتئین خام جیره غذایی بر عملکرد تولید مثلی و پاسخ‌های ایمنی مرغان بومی با استفاده از 300 قطعه مرغ بومی در ایستگاه خراسان رضوی و در قالب طرح‌ کاملاً تصادفی با 6 تیمار، 5 تکرار و 10 مرغ در هر تکرار از سن 26 الی 50 هفتگی انجام شد. تیمارها بر پایه ذرت، گندم، جو و کنجاله سویا، حاوی سطوح مختلف پروتئین خام شامل 5/17، 16، 5/14، 13، 5/11 و 10 (درصد جیره) بود. نتایج نشان داد که وزن اولیه جوجه و نسبت وزن جوجه به تخم‌مرغ از شروع دوره تا سن 50 هفتگی با افزایش سطح پروتئین خام تا 16 درصد افزایش معنی‌داری یافت و بعد از آن در سطح 5/17 درصد کاهش معنی‌داری را نشان داد (05/0P<). بالاترین قابلیت جوجه درآوری (76/85) در تمام دوره‌ها مربوط به تیمار 5/17 درصد پروتئین بود (05/0P<). بررسی نتایج پاسخ‌های ایمنی نشان داد که تیمار حاوی 5/17 درصد پروتئین خام، بالاترین عیار پادتن بر علیه SRBC و همچنین تیترهای IgG و IgM را نشان داد (05/0P<). اما در بررسی پاسخ‌های ایمنی وابسته به سلول، بالاترین پاسخ ایمنی سلولی مربوط به تیمار حاوی 16 درصد پروتئین بود (05/0P<). به طورکلی عملکرد تولیدمثلی و پاسخ ایمنی همورال مرغان بومی با افزایش سطوح پروتئین خام افزایش یافت.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of different levels of dietary crude protein on hatchability, chick weights, and immune response of khorasan’s native hens

نویسندگان [English]

  • A. R. Hessabi Nameghi 1
  • S. Sharbatdar 2
1 Assistant professor, Agricultural and Natural Resources Research Center, Khorasan Razavi
2 Former M. Sc. Student, Department of Animal Sciences, Gorgan University of Agricultural Sciences and Natural Resources
چکیده [English]

This experiment was conducted to evaluate the effects of different levels of dietary crude protein (CP) on reproductive performance of native hens at Khorasan stations using 300 hens, in a completely randomized design with 6 dietary treatments and 5 replicates and 10 hens in each replicate from 26 to 50 weeks of age. Treatments based on corn, soybean meal and wheat with different levels of protein, including 17.5, 16, 14.5, 13, 11.5, and 10% CP levels and another nutrient including the energy was equal as possible. Results showed that the initial weight of chickens and the ratio of chicken weight to egg weight increased with CP levels upto 16% from the beginning of experimental period to 50 weeks and decreased with 17.5% CP level. The highest hatchability percentage in all periods was related to the 17.5% CP diet that showed significant difference with other treatments (P<0/05). Results on immune responses showed that treatment with 17.5 % CP, the highest titer of antibody against SRBC, IgG and IgM (P<0/05). In relation to cellular immunity (Test CBH) the result was slightly different and the highest cellular immune response to treatments containing 16% CP and higher levels of CP (17.5%) education compared to the treatment (16%). Overall, the results showed that reproductive performance and humoral immune response of native birds improved with increasing levels of CP.

کلیدواژه‌ها [English]

  • Crude protein
  • Hatchability
  • Humoral and cell-mediated immune responses
  • Native layer hens

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