تأثیر منابع گوناگون روی بر عملکرد، غلظت مواد معدنی و فراسنجه‏های خون بره زندی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه علوم دام و طیور، پردیس ابوریحان، دانشگاه تهران

2 استادیار گروه علوم دام و طیور، پردیس ابوریحان، دانشگاه تهران

3 دانشیار گروه علوم دام و طیور، پردیس ابوریحان، دانشگاه تهران

چکیده

تأثیر منابع گوناگون روی (آلی و معدنی) بر عملکرد، غلظت مواد معدنی، و فراسنجه‏های خون بره‏های زندی با استفاده از 18 رأس بره نر در قالب طرح کاملاً تصادفی با سه تیمار بررسی شد. تیمارها عبارت بودند از: جیرۀ فاقد مکمل روی (شاهد)، جیرۀ حاوی ppm 25 روی معدنی (روی‌ـسولفات) و جیرۀ حاوی ppm 25 روی آلی (روی‌ـ‌پپتید). وزن نهایی، افزایش وزن روزانه، و مصرف خوراک بره‏هایی که در جیرۀ خود روی آلی دریافت کرده بودند از سایر تیمارها بیشتر بود و ضریب تبدیل بهتری داشتند (05/0P<). از غلظت مس و آهن در خون بره‏هایی که با جیره‏های حاوی روی (آلی و معدنی) تغذیه شدند، کاسته شد، ولی غلظت روی در خون آنها افزایش یافت (05/0P<). تعداد گلبول‏های سفید خون در بره‏های با تیمار روی‌ـ‌پپتید از سایر تیمارها کمتر بود (05/0>P). باتوجه به نتایج این مطالعه پیشنهاد می‏شود که ppm 25 روی آلی به جیرۀ بره‏های پرواری اضافه شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of different zinc sources on performance, blood mineral and cell counts of Zandi lambs

نویسندگان [English]

  • Mokhtar Malaki 1
  • Mohammadali Norouzian 2
  • Aliakbar Khadem 3
1 MSc., Department of Animal and Poultry Science, College of Abouraihan, University of Tehran, Pakdasht, Iran
2 Assistant Professor, Department of Animal and Poultry Science, College of Abouraihan, University of Tehran, Pakdasht, Iran
3 Associate Professor, Department of animal and Poultry Science, College of Abouraihan, University of Tehran, Pakdasht, Iran
چکیده [English]

This research was conducted to evaluate the effect of different zinc (Zn) sources on performance, blood
mineral and cell counts of Zandi lambs. 18 male lambs at weaning were supplemented with two different
sources of zinc, 25 ppm ZnSO4 and 25 ppm zinc-peptide added to the basal diet as control. Live body
weight, weight gain and feed efficiency improved with Zn-peptide supplementation (P<0.05). Sera Zn
concentration was higher and copper and iron concentration was lower in zinc supplemented groups
(P<0.05). Supplementation of zinc had no effect on blood cell counts except for white blood cells that
decreased with zinc peptide supplementation (P<0.05). It was concluded that adding 25 ppm zinc peptide
to fattening lamb diet improved performance and cause to higher level of blood zinc.

کلیدواژه‌ها [English]

  • Bioavailability
  • Blood cells
  • Feed intake
  • finishing lamb
  • Organic source
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