نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه تبریز

چکیده

به منظور بررسی تأثیر سطوح مختلف پودر سیر بر عملکرد تولیدی، کیفیت تخم­مرغ و فراسنجه­های خونی مرغ­های تخم­گذار تجاری، تعداد 128 قطعه مرغ تخمگذار سویه لوهمن لایت در سن 58 هفتگی(به مدت پنج هفته) و در قالب طرح کاملا تصادفی در بین چهار تیمار با چهار تکرار و هشت پرنده در هر قفس توزیع شد.جیره­های آزمایشی شامل جیره شاهد و سطوح یک، دو و سه درصد پودر­­­ سیر بودند. صفات مربوط به عملکرد و خصوصیات کیفی تخم­مرغ­ها برای هر یک از تکرارها در سن 61 و 63 هفتگی و میزان فراسنجه­های خونی و زرده تخم­مرغ در پایان دوره اندازه گیری شدند. نتایج نشان داد درصد تولید تخم­مرغ و مجموع توده تخم­مرغ، خوراک مصرفی و ضریب تبدیل غذایی تحت تاثیر تیمارهای آزمایشی قرار نگرفتند، اما افزودن پودر سیر در سطح سه درصد در مقایسه با شاهد سبب افزایش وزن تخم­مرغ گردید(05/0P<). افزودن سطح سه درصد پودر سیر در جیره غذایی در مقایسه با گروه شاهد موجب افزایش شاخص عدد هاو به میزان 25/4 واحد شد(05/0P<). مکمل پودر سیر در سطح سه درصد موجب کاهش سطح کلسترول سرم خون و زرده تخم­مرغ در مرغ­های تخم­گذار شد(05/0P<). فراسنجه­های خونی شامل لیپوپروتئین­های با چگالی بالا، تری­گلیسرید و آنزیم­های کبدی آسپارتات آمینوترانسفراز و آلانین­آمینوترانسفراز تحت تأثیر تیمارهای آزمایشی قرار نگرفتند. در کل، نتایج نشان داد افزودن پودر سیر به جیره غذایی مرغ­های تخم­گذار موجب افزایش وزن تخم­مرغ، بهبود کیفیت سفیده تخم­مرغ شد و همچنین سیر اثر کاهشی بر میزان کلسترول زرده تخم­مرغ داشت.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of different levels of dietary garlic powder on productive performance, egg quality traits and blood parameters of laying hens

نویسنده [English]

  • ravieh mohammadi

چکیده [English]

This study was conducted to investigate the effect of different level of garlic powder on the performance, egg quality traits and blood parameters in commercial laying hens. A total of one hundred and twenty eight 58-wk-old Lohmann lite (LSL) hens were allotted into 4 dietary treatment groups replicated 4 times with 8 hens per replicate in a completely randomized design. Experimental diets included of control diet (no supplemented garlic powder) and 3 levels of garlic powder, (1, 2 and 3% of diet). Laying performance traits and egg quality parameters were recorded by replicate at 61 and 63 wk-old. Blood and egg yolk parameters were measured at the end of the trial. Results indicated that egg production percent, egg mass, feed intakeand feed conversion rate were not affected by experimental treatments. However, egg weight was increased by 3% garlic powder compared with the control diet (P<0.05). Haugh unit of eggs increased by 4.25 units, at 3% garlic powder over the control diet (P<0.05). Garlic powder supplementation of laying hen diets at 3% level lead to decreases in serum and egg yolk cholesterol (P<0.05). Blood parameters including high density lipoproteins, triglycerideand liver aspartate aminotransferase and alanine aminotransferase were not affected by treatments. In conclusion, dietary supplementation of garlic powder improved egg weight and albumen quality of eggs and has also lowering effect on cholesterol content of egg yolk.

کلیدواژه‌ها [English]

  • cholesterol
  • egg weight
  • Hugh unit
  • liver enzymes
  • yolk
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