اثر مکمل جیره‌ای آسپرژیلوس زایلاناز روی عملکرد جوجه‌های گوشتی
Subject Areas : Camel
سی.ای. اُییگو
1
,
وی. ملامبو
2
,
وی. موچنج
3
,
یو. ماروم
4
1 - Department of Livestock and Pasture Science, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
2 - Department of Animal Science, Faculty of Agriculture and Natural Science, University of Mpumalanga, Private Bag X11283, Mbombela 1200, South Africa
3 - Department of Livestock and Pasture Science, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
4 - Department of Animal Science, School of Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
Keywords: گلوکز, لاکتوباسیلوس, وزن لاشه, آسپرژیلوس زایلاناز, وضعیت سلامتی,
Abstract :
اثر مکمل آسپرژیلوس زایلاناز (ASXYL) در جیره‌های غذایی ذرت سویا روی آسپارتات آمینوترانسفراز سرم، آلانین آمینوترانسفراز سرم، تست میکوبی، صفات رشد، خصوصیات لاشه و صفات کیفیت گوشت جوجه‌های گوشتی بررسی شد. 300 جوجه گوشتی یکروزه جنس مختلط Cobb 500 به 5 جیره غذایی با 5 تکرار هرکدام 12 پرنده اختصاص یافت. تیمارها شامل، ASXYL0 (0 g/kg)، ASXYL10 (1 g/kg)، ASXYL15 (1.5g/kg)، ASXYL20 (2g/kg) و ASXYL25 (2.5 g/kg) بودند. پرنده‌های تغذیه شده با ASXYL20 بیشترین وزن بدن (05/0P<) با ضریب تبدیل بهبود یافته (FCR) و مقادیر بالاتری برای ران، سینه، بال و عملکرد لاشه داشتند. وزن گردن برای پرندگان تغذیه شده با ASXYL0، ASXYL15 و ASXYL20 بالا بود (05/0P<). مقدار ران مرغ رکورد برداری شده بالاتر (05/0P<) برای پرندگان تغذیه شده با ASXYL20 اگرچه، مشابه با ASXYL10، ASXYL15 و ASXYL25. از دست دادن آب میان بافتی و کیفیت پخت و پز با افزایش سطوح مکمل ASXY کاهش داشت (05/0P<) اگرچه نیروی برشی همراه با افزایش مکمل ASXYL افزایش داشت. اوره، آسپارتات آمینوترانسفراز و آلانین ترانسفراز با افزایش سطوح مکمل ASXYL کاهش داشت اگرچه سطح گلوکز با افزایش سطوح مکمل ASXYL افزایش داشت. مکمل ASXYL تکثر شمار لاکتوباسیلوس‌ها در ایلئوم و سکوم را تحت تأثیر قرار داد اگرچه هیچ تفاوتی (05/0<P) روی جمعیت بیفیدوباکتریا و اشرشیاکلی هم در ایلئوم هم در سکوم جوجه‌های گوشتی در پایان آزمایش تغذیه‌ای مشاهده نشد. نتیجه گرفته شده که جیره ASXYL20 وزن بدن بهبود یافته بیشتر و مقادیر برشی جزئی تولید می‌کند. به‌علاوه، نشان‌گرهای زیستی نشان دادند که ASXYL وضعیت سلامتی جوجه‌های گوشتی را بهبود داده و آنزیم آزمون شده بر محیط روده تأثیر مثبت گذاشت.
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