تأثیر سطوح مختلف ضایعات کارخانه‌های بسته‌بندی خرما و سن پروار بر عملکرد و خصوصیات لاشه بره‌های پرواری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 بخش تحقیقات علوم دامی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان بوشهر، سازمان تحقیقات، آموزش و ترویج کشاورزی، بوشهر، ایران

2 موسسه واکسن و سرم سازی رازی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران

10.22034/AEJ.2021.310296.2662

چکیده

هدف از انجام این آزمایش بررسی اثر سطوح مختلف ضایعات کارخانه‌های بسته‌بندی خرما و سن پروار بر عملکرد و خصوصیات لاشه بره‌های پرواری بود. تعداد 24 راس بره نر بومی در قالب طرح بلوک‌های کامل تصادفی به روش فاکتوریل با سه سطح ضایعات کارخانه‌های بسته‌بندی خرما (0، 10 و 20 درصد جیره) و دو سن پروار (4/5 ماهه با میانگین وزن 0/92±23/03 یا 6/5 ماهه با میانگین وزن 3/61±31/66) به مدت 90 روز پروار شدند. نتایج آزمایش نشان داد که سن پروار بر افزایش وزن روزانه، خوراک مصرفی وضریب تبدیل خوراک تاثیر معنی‌داری داشت (0/01>P). بره‌های 6/5 ماهه نسبت به بره‌های 4/5 ماهه افزایش وزن روزانه بالاتری داشتند اما با توجه به ماده خشک مصرفی کم تر بره‌های 4/5 ماهه، ضریب تبدیل خوراک بره‌های 4/5 ماهه بهتر بود. سطوح مختلف ضایعات کارخانه‌های بسته‌بندی خرما تأثیر معنی‌داری بر افزایش وزن روزانه، مصرف خوراک و ضریب تبدیل خوراک نداشت. بره‌های 6/5 ماهه بازده لاشه بالاتری داشتند و درصد وزن اندام‌های داخلی آن‌ها نسبت به بره‌های 4/5 ماهه کم تر بود (0/05<P). اثر متقابل بین سن پروار و درصد استفاده از ضایعات بسته‌بندی خرما روی عملکرد یا خصوصیات لاشه تاثیر معنی‌داری نداشت. در کل مشخص شد پروار بره ‎های 4/5 ماهه نسبت به بره‌های با سن 6/5 ماه، با توجه به ضریب تبدیل غذایی مناسب‌، بهتر بوده و ضایعات کارخانه‌های بسته‌بندی خرما می ‎تواند تا 20 درصد ماده خشک جیره در تغذیه بره ‎های پرواری استفاده شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of age and Waste of date packing factories on performance and carcass characteristic of fattening lambs

نویسندگان [English]

  • Mohammad hadi Sadeghi 1
  • Amir Arsalan Kamali 1
  • Seyed Abutaleb Sadeghi 1
  • AbdulMahdi Kabirifard 1
  • Mahmoud Dashtizadeh 1
  • Hossein Khaj 2
1 Animal Science Research Department, Bushehr Agriculture and Natural Resources and Education Center, Agriculture Research, Education and Extension Organization, Bushehr, Iran
2 Razi Vaccine and Serum Research Institute, Agricultural Research Education and Extension Organization, Karaj, Iran
چکیده [English]

This experiment aimed to investigate the effect of fattening age and different levels of Waste of date packing factories on the performance and carcass characteristics of fattening lambs. 24 native lambs were fed for 90 days in a randomized complete block design with three levels of Waste of date packing factories (0, 10, and 20% of rations) and 2 fattening ages (4.5 months old, 23.03 ±0.92 kg or 6.5 months old, 31.44 ±3.61 kg). The results showed that the age of fattening had a significant effect on daily weight gain, dry matter intake, and feed conversion ratio (P<0.01). 6.5-month-old lambs had higher daily weight gain than 4.5-month-old lambs, but due to more dry matter intake, the feed conversion ratio of 4.5-month-old lambs was better. Different levels of Waste of date packing factories had no significant effect on daily weight gain, feed intake, feed conversion ratio, and carcass characteristics. 6.5-month-old lambs had higher carcass yields, and the percentage of internal organs weighed less than 4.5-month-old lambs (P<0.01). The interaction between fattening age and Waste of date packing factories had no significant effect on fattening age or carcass characteristics.  In general, 4.5-month-old lambs are fattened better than 6.5-month-old lambs due to their better feed conversion ratio. Also, Waste from date packing plants can be used up to 20% of the dry matter in the diet to feed fattening lambs.

کلیدواژه‌ها [English]

  • Age of fattening
  • Carcass characteristics
  • Fattening performance. Waste of date packing factories

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فصلنامه محیط زیست جانوری
دوره 14، شماره 3
آبان 1401
صفحه 55-62

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