نویسندگان

1 دانش آموخته کارشناسی ارشد گروه پرورش و تولید طیور، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

2 استادیار گروه پرورش و تولید طیور، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

3 استاد گروه پرورش و تولید طیور، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

چکیده

این مطالعه به منظور بررسی اثر ضدعفونی کننده های مختلف خوراک بر عملکرد، فلور میکروبی روده و کلسترول تخم مرغ با استفاده از 108 قطعه مرغ تخم گذار از سن 24 تا 36 هفتگی انجام شد. این آزمایش در قالب طرح بلوک های کامل تصادفی با پنج تیمار و سه تکرار انجام شد. گروه‌های آزمایشی عبارت بودند از: جیره پایه (شاهد) و جیره پایه مکمل شده با یکی از افزودنی های نانوسیلور در خوراک (ppm 15)، فورمایسین (ppm 200)، فرمالین (ppm 200) و نانوسیلور در آب آشامیدنی (ppm 5/7). هیچ تفاوت معنی داری بین گروه های آزمایشی از نظر درصد تولید و وزن تخم مرغ وجود نداشت. مصرف فورمایسین بالاترین وزن توده تخم مرغ را موجب شد (05/0>P). بین دو روش استفاده از نانوسیلور، تفاوت معنی داری از نظر درصد تولید، وزن تخم مرغ و وزن توده تخم مرغ مشاهده نشد. باکتری های اسیدلاکتیک در سکوم تحت تأثیر نانوسیلور و فرمالین درمقایسه با گروه‌های شاهد و فورمایسین افزایش یافت (01/0>P). همه افزودنی های مورد آزمایش درمقایسه با شاهد، باکتری های گرم منفی ایلئوم را کاهش دادند (01/0>P). افزودن فورمایسین به جیره و نانوسیلور در آب موجب افزایش کلسترول زرده شد (01/0‌< P). نتایج نشان داد که افزودن فرمالین و نانوسیلور به خوراک مرغ های تخم گذار، موجب کاهش بار میکروبی دستگاه گوارش و بهبود تولید می شود.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of Nanosilver and in-Feed Disinfectants on Layer Performance and Intestinal Microflora and Yolk Cholesterol

نویسندگان [English]

  • Fathollah Naghizadeh 1
  • Mohammad Amir Karimi Torshizi 2
  • shaban rahimi 3

چکیده [English]

This study was conducted to compare the effect of various commercial in-feed disinfectants on layer performance, intestinal microflora, and egg cholesterol. One hundred and eight layer hens (LSL, 24 Wks of age) were divided into six groups consisting: Control, Formaycin-200 ppm, Formalin-200 ppm, and Nanosilver in feed-15 ppm or drinking water-7.5 ppm. There were no differences between experimental groups for egg production and egg weight. Formycin fed birds produce the highest egg mass (P< 0.05). In comparison of the two methods of Nanosilver administration, no significant differences were observed for egg production, egg weight and egg mass. Lactic acid bacteria counts in caecal contents were significantly increased in comparison to control and Formycin fed groups (P< 0.01). Gram negative counts in ileum contents were reduced by all additives, in comparison to control (P< 0.01). Cholesterol content of egg was increased in response to Formycin and Nanosilver (in drinking water) (P< 0.01). In conclusion, in-feed supplementation of Formalin and Nanosilver in laying hens’ feed resulted in efficient control of intestinal microbial counts and simultaneously improved the egg yield.

کلیدواژه‌ها [English]

  • Disinfectants
  • Intestinal microflora
  • nanosilver
  • yolk cholesterol
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