تأثیر سین‌بیوتیک بر عملکرد، مورفولوژی روده، جمعیت میکروبی مدفوع و متابولیت‌های خونی در بره‌های شیرخوار

Subject Areas : Camel

ا. معرب ¹ , ت. قورچی ² , س. رمضانپور ³ , ف. گنجی ⁴ , ع.ر. کوچک زاده ⁵

1 - Department of Animal Science, University of Agricultural Science and Natural Resources of Gorgan, Gorgan, Iran
2 - Department of Animal Science, University of Agricultural Science and Natural Resources of Gorgan, Gorgan, Iran
3 - Department of Animal Science, University of Agricultural Science and Natural Resources of Gorgan, Gorgan, Iran
4 - Department of Biology, Faculty of Science, Golestan University, Gorgan, Iran
5 - Department of Animal Science, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

Received: 2015-11-14 Accepted : 2016-10-01 Published : 2016-09-01

Keywords: عملکرد, مدفوع, سین‌بیوتیک, مورفولوژی روده, بره‌های شیرخوار,

Abstract :

تأثیر افزودن مکمل سین­بیوتیک در جیره بره­های شیرخوار نژاد مغانی مورد آزمایش قرار گرفت. هیجده بره به سه گروه (6 رأس در هر گروه براساس وزن 5-6 ماه و سن 2±3 روز) تقسیم شد و دوره پرورش 90 روز بود. تیمارها عبارت بودند از: شاهد (بره­های تغذیه شده با شیر مادر همراه با جیره آغازین)، جیره شاهد + 3 گرم سین­بیوتیک به ­ازای هر بره در روز، و جیره شاهد + 6 گرم سین­بیوتیک به ­ازای هر بره در روز. مصرف ماده خشک، افزایش وزن روزانه و ضریب تبدیل خوراک به طور ماهانه در طول دوره پرورش اندازه­گیری شد. نمونه­گیری خون در روزهای ابتدا و انتهای دوره پرورش انجام گرفت. نمونه­گیری مدفوع برای اندازه­گیری بار میکروبی مدفوع هر ماه در طی پرورش انجام شد و کلی­فرم­ها، لاکتو باسیلوس­ها و باکتری­های هوازی کل اندازه­گیری شدند. در پایان دوره پرورش تعداد 4 بره از هر گروه به­ منظور بررسی تغییرات مورفولوژیکی روده کشتار شدند. تیمار حاوی 3 گرم سین­بیوتیک به ­ازای هر بره در روز بیشترین مقدار افزایش وزن روزانه، وزن بدن، مصرف خوراک روزانه و بهترین ضریب تبدیل را نسبت به گروه شاهد داشت، اما تفاوت معنی­داری مشاهده نشد. استفاده 3 گرم سین­بیوتیک به­ طور معنی­داری کلسترول خون را کاهش داد. تعداد کلی­فرم­های مدفوع و لاکتو باسیل­ها به ترتیب به ­طور معنی­داری کاهش و افزایش پیدا کرد. نتایج نشان داد سین­بیوتیک می­تواند به­ عنوان محرک رشد در بره­ها استفاده شود و باعث بهبود سلامتی روده آنها شود.

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