عملکرد تولیدی و توسعة عضلة سینه در جوجة گوشتی متأثر از تنش گرسنگی پس‌از تفریخ در پاسخ به تزریق گلوکونات‌کلسیم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه لرستان

2 دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه لرستان

3 عضو هیات علمی

چکیده

این آزمایش با هدف بررسی تأثیر صفر، 12، 24، 36 و 48 ساعت گرسنگی پس ‌از تفریخ، با و بدون تزریق زیرجلدی 6/0 میلی‌لیتر گلوکونات‌کلسیم بر عملکرد تولیدی و توسعة عضله سینه در جوجة گوشتی تا 28 روزگی اجرا شد. گرسنگی پس از تفریخ، مصرف خوراک و افزایش وزن جوجه در دوره‌های سنی مختلف تا 28 روزگی را به طور معناداری کاهش داد. تزریق گلوکونات کلسیم موجب بهبود صفات عملکردی در جوجه نشد. طولانی‌شدن گرسنگی پس ‌از تفریخ تا 36 ساعت باعث افزایش تلفات جوجه‌ها شد. تزریق گلوکونات‌کلسیم درصد تلفات جوجه‌های متأثر از گرسنگی را افزایش داد (05/0P<). شاخص راندمان اقتصادی با افزایش زمان گرسنگی تا 36 ساعت کاهش یافت و برای جوجه‌های دریافت‌کنندة گلوکونات‌کلسیم کمتر از گروه فاقد تزریق بود. گرسنگی پس‌از تفریخ تا 48 ساعت تأثیر معناداری بر وزن سینه، وزن عضلات بزرگ و کوچک سینه، ابعاد ظاهری سینه و بافت‌شناسی سینه در 28 روزگی نداشت ولی وزن استخوان سینه را کاهش داد. نتیجه‌گیری شد که گرسنگی پس ‌از تفریخ بیش‌ از 24 ساعت، تأثیر منفی بر عملکرد تولیدی جوجه‌های گوشتی تا 28 روزگی دارد. تزریق زیرجلدی 6/0 میلی‌لیتر گلوکونات‌کلسیم، عملکرد تولیدی و توسعة عضلة سینه جوجه‌های گوشتی متأثر از گرسنگی پس از تفریخ را بهبود نداد.

کلیدواژه‌ها

عنوان مقاله [English]

Subsequent productive performance and breast muscle development in fasted neonatal broiler chicks injected with calcium gluconate

نویسندگان [English]

  • Jafar Arvan 1
  • Heshmat-olah Khosravinia 2
1 Former Graduate Student, Department of Animal Science, Faculty of Agriculture, University of Lorestan
2 Associate Professor, Department of Animal Science, Faculty of Agriculture, University of Lorestan
3
چکیده [English]

This study was carried out to examine the effect of post hatch fasting (PHF) period with and without subcutaneous injection of 0.6 ml Ca-gluconate (Ca-g) on productive performance and breast muscle development in broiler chicks up to day 28 of age. Weight gain (WG) and feed intake (FI) were significantly reduced and FCR was increased as PHF lasted for 36 h. Injection of Ca-G did not improve WG and FI of the chicks compared to the control group (without injection). Post hath fasting through 36 h of age suppressed WG, FI and FCR and increased mortality rate up to day 28 of age (P>0.05). Economic efficiency factor was decreased in coordinate with increase in PHF periods and it was lower in Ca-G injected birds compared to the control birds. Breast weight, breast muscles weight, breast external dimensions and breast muscle histology was not affected by extended PHF up to 48 h and Ca-G injection. Breast bone weight was decreased in the chicks experienced PHF for 48 h. It was concluded that PHF greater than 24 h has negative impact on productive performance in broiler chicks at 28 d of age. Administration of Ca-g to the neonate broiler chicks did not improve performance and showed an adverse effect on viability of the birds.

کلیدواژه‌ها [English]

  • Broiler Chickens
  • neonatal fasting
  • Calcium gluconate
  • Productive performance
  • breast

مراجع

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سابقه مقاله

  • تاریخ دریافت: 01 مهر 1392
  • تاریخ بازنگری: 28 اردیبهشت 1394
  • تاریخ پذیرش: 29 اردیبهشت 1394

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