بررسی شدت و سن شروع اعمال محدودیت غذایی بر عملکرد و مورفولوژی روده جوجه‌های گوشتی

نوع مقاله: مقاله کامل

نویسندگان

1 استادیار گروه علوم دامی، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران

2 دانش آموخته کارشناسی ارشد مدیریت پرورش و تولید طیور، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زابل ،ایران

3 استادیار بیماریهای طیور، دانشکده کشاورزی مشگین شهر، دانشگاه محقق اردبیلی، اردبیل، ایران

4 دانشجوی دکتری تغذیه دام، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زابل، زابل

چکیده

این مطالعه به منظور ارزیابی اثرات شدت و زمان شروع اعمال محدودیت غذایی اولیه بر عملکرد و مورفولوژی روده‌ی باریک جوجه‌های گوشتی انجام گرفت. بدین منظور، 350 قطعه جوجه گوشتی نر یک ‌روزه‌ی سویه راس 308 به 7 تیمار با 5 تکرار 10 قطعه‌ای تقسیم شدند. تیمارهای آزمایشی شامل گروه شاهد (بدون محدودیت غذایی) و تیمارهایی با 3 شدت محدودیت غذایی کمی (20، 40 و 60 درصد از خوراک مصرفی) و 2 سن شروع محدودیت غذایی (7 و 10 روزگی) به مدت 5 روز بود. افزایش وزن بدن جوجه‌های با تغذیه محدود در کل دوره آزمایشی (1 تا 49 روزگی) نسبت به تیمار شاهد معنی‌دار نبود. اگرچه، مصرف خوراک و ضریب تبدیل غذایی در جوجه‌های با تغذیه محدود نسبت به تیمار شاهد بطور معنی‌داری کاهش یافته بود (01/0 > p). در سن 49 روزگی استفاده از محدودیت غذایی باعث کاهش معنی‌دار (01/0 > p) وزن نسبی چربی محوطه بطنی در جوجه‌های با تغذیه محدود نسبت به گروه شاهد شده بود، اگرچه وزن نسبی لاشه گرم، عضله سینه و ران تحت تاثیر تیمارهای آزمایشی قرار نگرفته بود. اعمال محدودیت غذایی بین تیمارها تاثیر معنی‌داری بر مورفولوژی روده باریک در سن 28 روزگی نداشت. نتایج این مطالعه بطور کلی نشان داد که اعمال محدودیت غذایی کمی در دوره آغازین می تواند عملکرد پرنده را بدون هیچ گونه اثر مضری، حفظ نماید.

کلیدواژه‌ها


عنوان مقاله [English]

Survey of intensity and age of feed restriction on performance and gut morphology in broiler chickens

نویسندگان [English]

  • Gh. Jalilvand 1
  • S. Aqil 2
  • A. Azizpour 3
  • R., Habibi 4
1 Assistant professor, Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
2 MSc. of raising management and poultry production, Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
3 Assistant Professor, Meshginshahr Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran.
4 Ph.D Student of Animal Nutrition, Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
چکیده [English]

This study was conducted to evaluate the effects of primary feed restriction with different intensity and time on performance and gut morphology in broiler chicks. For this purpose, a total of 350 Ross 308 broiler chicks divided into 7 treatments with 5 replicates of 10 birds per pen. Experimental treatments were included control treatment (no feed restriction), quantitative feed intensities in 3 levels (20, 40 and 60% from feed intake) and 2 ages of onset feed restriction (7 and 10 days of age) in 5 days duration. Weight gain in birds with limited nutrition not had significant difference (P>0.05) than control group in all period (1 to 49 days). However, feed intake and feed conversion ratio in chicks with feed restriction significantly decreased (P<0.01) compared to control treatment. With using feed restriction relative weight of abdominal fat significantly decreased (P<0.01) in 49 days of age. However experimental treatments not influence (P>0.05) on relative weight of hot carcass, breast and thigh muscles. Feed restriction treatments among not affect on gut morphology in 28 days of age. In general, the results of this study showed that apply of quantitative feed restriction in starter period could be keep bird performance without any harmful effect.

کلیدواژه‌ها [English]

  • Feed Restriction
  • performance
  • Gut morphology
  • Broiler chick


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