نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته دکتری دانشکده علوم دامی دانشگاه علوم کشاورزی و منابع طبیعی گرگان

2 استاد گروه علوم دامی دانشگاه علوم کشاورزی و منابع طبیعی گرگان

3 دانشیار گروه علوم دامی دانشگاه علوم کشاورزی و منابع طبیعی گرگان

4 استاد گروه علوم دامی دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

این آزمایش به منظور بررسی اثر سطوح مختلف کنجاله گلوتن ذرت ( 4 و 8 درصد) بدون فرآوری و فرآوری شده با آنزیم پروتئاز (mg/L300)، در قالب طرح کاملاً تصادفی و آزمایش فاکتوریل 2×2 با یک جیره شاهد بر عملکرد، فراسنجه‌های بیوشیمیایی خون، ایمنی و جمعیت میکروبی ایلئوم جوجه‌های گوشتی انجام شد. 200 قطعه جوجه خروس گوشتی یک روزه سویه تجاری راس 308 با 5 تیمار، 4 تکرار و 10 قطعه جوجه در هر تکرار به مدت 38 روز پرورش یافتند. طی دوره آزمایش مصرف خوراک، افزایش وزن و ضریب تبدیل غذایی اندازه‌گیری شد. در سن 30 و 37 روزگی، جهت بررسی ایمنی و در سن 38 روزگی، جهت تعیین برخی از فراسنجه‌های بیوشیمیایی خون از ورید بال خون‌گیری به عمل آمده است. در پایان دوره آزمایش از بخش ایلئوم، جمعیت میکروبی مورد بررسی قرار گرفت. نتایج این آزمایش نشان داد که جیره‌های آزمایشی حاوی 4 و 8 درصد کنجاله گلوتن ذرت فرآوری شده با آنزیم پروتئاز در اثرات متقابل و مقایسات مستقل نسبت به شاهد دارای افزایش مصرف خوراک، افزایش وزن بدن و کاهش ضریب تبدیل غذایی بود (05/0P<)، و همچنین، تیمار حاوی 8 درصد گلوتن ذرت فرآوری شده با آنزیم پروتئاز در اثرات متقابل و مقایسات مستقل سبب افزایش ایمنی، سوپراکسیددیسموتاز و کاهش فلور میکروبی مضر در پایان دوره شد (05/0P<). به طور کلی، نتایج این آزمایش نشان داد که فرآوری گلوتن ذرت با آنزیم پروتئاز در شرایط آزمایشگاهی و استفاده از آن در جیره غذایی جوجه‌های گوشتی سبب بهبود عملکرد، ایمنی و کاهش جمعیت میکروبی مضر شد.

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