اثر منبع و اندازه ذرات فیبر جیره غذایی بر عملکرد و کیفیت تخم‌مرغ در مرغ های تخمگذار تجاری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی

2 استادیار گروه علوم دامی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی

چکیده

این تحقیق به‌ منظور بررسی اثر منابع و اندازه ذرات فیبر بر عملکرد تولیدی و کیفیت تخم‌مرغ در مرغ‌های تخمگذار انجام شد. آزمایش با 324 قطعه مرغ تخمگذار سویه لوهمن در سن 27 هفتگی با نه تیمار و شش تکرار به ازای هر تیمار به مدت 12 هفته انجام شد. تیمارهای آزمایشی عبارت بودند از: گروه شاهد، دو منبع فیبر (پوسته آفتابگردان و تفاله چغندرقند)، دو سطح فیبر (5/2 و 5 درصد) و دو اندازه ذرات فیبر (ریز، 2 میلی‌متر و درشت، 6 میلی‌متر). اثرات اصلی منابع فیبر، سطح فیبر و اندازه ذرات فیبر در کل دوره بر وزن تخم‌مرغ، توده تخم‌مرغ، درصد تولید تخم‌مرغ، ضریب تبدیل غذایی، وزن مرغ و مصرف خوراک روزانه معنی‌دار نبود. به کار بردن 5 درصد پوسته آفتابگردان با اندازه ذرات درشت، وزن و ضخامت پوسته را در مقایسه با گروه کنترل در سن 30 هفتگی کاهش داد (05/0P< ). همچنین رنگ زرده در گروهی که 5/2 درصد پوسته آفتابگردان با اندازه ریز دریافت کردند کاهش و در 5 درصد تفاله چغندرقند، در مقایسه با شاهد افزایش یافت (0001/0P< ). واحد هاو در پوسته آفتابگردان نسبت به تفاله چغندرقند در سن 38 هفتگی کاهش یافت (05/0P< ). افزودن منابع فیبر، pH مدفوع مرغ‌های تخمگذار را نسبت به گروه شاهد افزایش داد (05/0P< ). رقیق ­کردن جیره با پوسته آفتابگردان و تفاله چغندرقند تا سطح 5 درصد اثر منفی بر عملکرد تولیدی مرغ‌های تخمگذار ندارد، در حالی­که باید اثرات آنها بر کیفیت تخم­مرغ مورد توجه قرار گیرد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of source and particle size of dietary fiber on performance and egg quality in commercial laying hens

نویسندگان [English]

  • P. Azizi 1
  • S. Moradi 2
1 Graduated MSc. Student, Department of Animal Science, Faculty of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
2 Assistant Professor, Department of Animal Science, Faculty of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
چکیده [English]

This study was conducted to determine effect of sources and particle size of fiber on performance, egg quality and pH of excreta in laying hens. A total of 324 Lohmann LSL-lite laying hens was arranged in a factorial experiment with nine dietary treatments, each replicated six times. Experimental treatments consisted of two fiber sources (sunflower hulls, SFH and sugar beet pulp, SBP), two levels of fiber (2.5 and 5%), two fiber particle size (fine, 2 mm and coarse, 6 mm) with a control group. Results showed that main effects of sources, level and particle size of fibers did not significantly affect hen-day egg production, egg weight, egg mass, feed intake, feed conversion ratio and body weight gain. On week 30, inclusion of coarse SFH (5%) significantly reduced shell weight and shell thickness (P< 0.05), also yolk color was decreased in birds fed 2.5% of SFH with fine particle, whereas yolk color was greater in birds received 5% SBP than control (P< 0.0001). On week 38, main effect of fiber source was significant on haugh unit, and albumin quality was higher in SBP than SFH (P< 0.05). Feeding fiber sources elevated pH of excreta compared to control (P< 0.05). The inclusion of up to 5% SFH and SBP at the expense of the control diet did not have any negative effect on productive performance of laying hens, however, more attention is needed to effects on egg quality.

کلیدواژه‌ها [English]

  • Fiber
  • Performance
  • Egg quality
  • Laying hens

مراجع

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تحقیقات تولیدات دامی
دوره 6، شماره 4
اسفند 1396
صفحه 93-106

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