تأثیر عمل آوری شیمیایی مواد بستری بر کیفیت بستر، عملکرد رشد و وقوع جراحات پوستی لاشه جوجه های گوشتی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه پرورش و تولید طیور دانشکده کشاورزی دانشگاه تربیت مدرس

2 استاد گروه پرورش و تولید طیور دانشکده کشاورزی دانشگاه تربیت مدرس

3 استادیار گروه تکنولوژی تولیدات دامی دانشکده کشاورزی دانشگاه لرستان

4 استادیار گروه پرورش و تولید طیور دانشکده کشاورزی دانشگاه تربیت مدرس

چکیده

این آزمایش با استفاده از 576 قطعه جوجه گوشتی نر و ماده (با نسبت مساوی) سویه آرین به صورت آزمایش فاکتوریل 4×2 در قالب طرح پایه کاملاً تصادفی با 3 تکرار انجام شد. فاکتورها شامل 2 ماده بستری خاک اره و کاه گندم و 4 ترکیب افزودنی مواد شیمیایی متشکل از: 1) سولفات آلومینیوم + آهک، 2) زئولیت طبیعی + اسید سیتریک، 3) ترکیبی از مواد شیمیایی فوق و 4) گروه شاهد (بدون افزودنی به بستر)، بود. در 42 روزگی عملکرد پرنده (وزن زنده، افزایش وزن، مصرف خوراک، ضریب تبدیل و درصد تلفات)، pH بستر، ابقای نیتروژن (درصد)، جمعیت باکتری های هوازی کل و اسید لاکتیکی بستر (cfu/g 1) تحت تأثیر معنی دار مواد بستری و مواد افزودنی شیمیایی و اثر متقابل نوع بستر × نوع افزودنی قرار نگرفت (05/0<P). درصد رطوبت بستر تحت تأثیر معنی دار مواد بستری قرار گرفت (05/0>P). درصد شیوع زخم های سینه و کف پا برای هر کدام از تیمارهای بستری و افزودنی غیر معنی دار و تنها درصد شیوع سوختگی مفصل خرگوشی تحت تأثیر معنی دار عمل آوری بستر قرار گرفت (05/0>P)، به طوری که استفاده از بستر خاک اره و عمل آوری بستر با مواد شیمیایی منجر به کاهش وقوع و شدت آن در مقایسه با تیمار شاهد شد.

عنوان مقاله [English]

Effect of adding chemical amendment to litter materials (sawdust and wheat straw) on litter quality, growth performance and incidence of carcass lesions in broiler

نویسندگان [English]

  • D Farhadi 1
  • F Shariatmadari 2
  • H Khosravinia 3
  • M.A Karimi. Torshiz 4
3 Assiatant Professor of Technology of Animal Products, Agricultural College, Lorestan University. Khoramabad
4 Assistant Professor of Poultry Science Dept, Agriculture College, Tarbiat Modares University, Tarbiat Modares University. Tehran. Iran
چکیده [English]

The purpose of this research was to evaluate the effects of litter chemical amendments on litter Quality, broiler performance and Carcass Lesions (breast blisters, foot pad lesions and hock burns). In a 2×4 factorial experiment with 576 commercial broiler chicks (Arian), the effect of two types of litter materials and three amendments were investigated using a completely randomized design with three replications and 24 day-old chicks in each pen. Litter material treatments were: 1) sawdust and 2) wheat straw. Litter amendment treatments were: 1) control (with no litter amendment), 2) alum + CaCO3, 3) natural zeolite + citric acid, 4) whole additives from 2 and 3 treatments. Litter materials and amendments and interaction between those did not have any effect on weight gain, feed consumption, feed conversion, and mortality percentage in chicks and pH value, nitrogen retention (%), total plate counts and lactobacillus populations (cfu/g) in litter. Moisture percentage significantly affected by litter types (P>0.05). Incidence of breast blisters or footpad lesions were not significantly affected by litter materials and amendments. Incidence of hock burns significantly affected by litter chemical amendments (P>0.05), in a way that use of sawdust litter and chemical amendments resulted in decrease of incidence and severity of hock burn in broiler.

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