تأثیر تراکم گله و سطح متیونین بر عملکرد رشد و ایمنی جوجه‌های گوشتی

Subject Areas : Camel

س. حیدری ¹ , م. طغیانی ²

1 - Department of Animal Science, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
2 - Department of Animal Science, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

Received: 2017-09-25 Accepted : 2018-01-31 Published : 2018-09-01

Keywords: عملکرد, ایمنی, جوجه گوشتی, متیونین,

Abstract :

آزمایش حاضر به منظور بررسی اثر تراکم گله و سطوح افزایشی متیونین بر عملکرد، پاسخ ایمنی، ویژگی‌های لاشه و اندام‌های گوارشی جوجه‌های گوشتی انجام شد. در این آزمایش 390 قطعه جوجه گوشتی یکروزه (راس 308) به صورت کاملاً تصادفی در قالب طرح کاملاً تصادفی به صورت آزمایش فاکتوریل 2 × 3 با 6 تیمار و 5 تکرار اختصاص یافتند. تیمارهای آزمایشی شامل: 3 سطح تراکم گله (12، 16 و 18 جوجه در مترمربع) و 2 سطح متیونین (100 و 120 درصد توصیه شده برای سویه راس 308) در 42 روز آزمایش استفاده شدند. نتایج نشان داد که تراکم 18 در کل دوره پرورش وزن بدن، افزایش وزن بدن و مصرف خوراک را کاهش و ضریب تبدیل غذایی را افزایش داد (05/0>P). در سن 42 روزگی در سطح 120 درصد متیونین وزن بدن تمایل به افزایش داشت. تراکم گله به طور معنی‌داری وزن نسبی پیش معده، پانکراس، سنگدان و دئودنوم را تحت تأثیر قرار داد (05/0>P). جوجه‌هایی که سطح 120 درصد متیونین دریافت کردند، وزن نسبی ژژنوم و طول ایلئوم آنها به طور معنی‌داری افزایش یافت (05/0>P). تیتر آنتی‌بادی علیه سلول‌های قرمز خون گوسفند (SRBC)، ویروس‌های نیوکاسل و آنفلوانزا، نسبت هتروفیل به لنفوسیت و ارگان‌های لنفوئیدی به جز طحال تحت تأثیر تیمارهای آزمایشی قرار نگرفتند (05/0>P). در مجموع، تراکم جیره اثر منفی بر عملکرد جوجه‌های گوشتی داشت و سطوح متیونین اثر قابل توجهی بر عملکرد آنها نداشت.

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