نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد تغذیۀ دام، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه لرستان، خرم‏ آباد، ایران

2 دانشیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه لرستان، خرم ‏آباد، ایران

3 استادیار، گروه علوم بالینی، دانشکدۀ دامپزشکی، دانشگاه لرستان، خرم‏ آباد، ایران

چکیده

تأثیر طول زمان گرسنگی پس از تفریخ و تزریق گلوکونات کلسیم بر عملکرد تولیدی، پاسخ ایمنی و تلفات در مرغ گوشتی، با استفاده از 640 قطعه جوجۀ گوشتی سویۀ راس 308 در یک آزمایش فاکتوریل 2×5 با پنج زمان گرسنگی (صفر، 12، 24، 36 و 48 ساعت) و دو سطح گلوکونات کلسیم (صفر و 6/0 میلی‏لیتر) در قالب طرح بلوک‏های کامل تصادفی با چهار بلوک و 16 جوجه در هر واحد آزمایشی، تا 28روزگی بررسی شد. طولانی‏شدن گرسنگی پس از تفریخ تا 36 ساعت، باعث کاهش وزن پرنده، کاهش درصد منوسیت‏ها در خون و افزایش تلفات جوجه‏ها شد. تزریق گلوکونات کلسیم، تلفات جوجه‏ها را تا شش برابر افزایش داد (05/0>P). تزریق گلوکونات کلسیم عیار پادتن علیه ویروس نیوکاسل در 15روزگی را افزایش داد. اثر متقابل گرسنگی×گلوکونات کلسیم بر درصد تلفات جوجه‏ها معنی‏دار بود و جوجه‏های دریافت‏کنندۀ تزریق گلوکونات کلسیم تلفات بیشتری در تمام ساعات گرسنگی داشتند. بنابراین، بیش از 24 ساعت گرسنگی پس از تفریخ، تأثیر منفی بر عملکرد تولیدی و تلفات جوجه‏های گوشتی تا 28روزگی دارد. تزریق 6/0 میلی‏لیتر گلوکونات کلسیم به‏عنوان منبع کلسیم و گلوکز باعث افزایش تلفات جوجه‏ها طی گرسنگی پس از تفریخ و حفظ سطح پادتن‏های مادری در خون در 15روزگی و بهبود پاسخ ایمنی اولیه در جوجه‌ها شد.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of calcium gluconate injection and post hatch fasting on immune response, mortality and performance in broiler chicks up to day 28 of age

نویسندگان [English]

  • Zeinab Pourazadi 1
  • Heshmatollah Khosravinia 2
  • Hassan Nourozian 3

1 M.Sc. Department of Animal Science, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

2 Associate Professor, Department of Animal Science, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

3 Assistant professor, Department of Animal Science, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

چکیده [English]

Effects of post-hatch fasting (PHF) and subcutaneous injection of Ca-gluconate (Ca-g) on productive performance, immune response and mortality of broiler chicks were investigated using 640 one-day-old Ross 308 chicks in a 5×2 factorial experiment with five PHF levels (zero, 12, 24, 36 and 48 h) and two Ca-g injection levels (zero and 0.7 ml) in a completely randomized block design in four replicate pens of 16 birds each up to day 28 of age. The extended PFD up to 36 h significantly decreased body weight and percentage of monocytes and increased mortality of the chicks. Injection of Ca-g increased mortality of the birds by six-fold compared with the control birds (P<0.05). The Ca-g injected birds showed greater antibody titer against Newcastle virus at day 15 of age. The mortality rate of the chicks was significantly affected by PHF×Ca-g interaction and the Ca-g injected birds showed greater mortality percent during all PHF periods. It was concluded that PHF greater than 24 h has adverse effect on productive performance and mortality in broiler chicks at day 28 of age. Administration of Ca-g into the neonate fasted chicks as a source of Ca, glucose and water increased mortality but maintained the yolk immunoglobulins and improved early immune response through day 15 of age.

کلیدواژه‌ها [English]

  • Blood calcium
  • Broiler Chickens
  • Calcium gluconate
  • Fasting
  • Hatch
  • immune response
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