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تأثیرات تغذیۀ سطوح بالای ال-آرژنین در دورۀ آغازین بر تولید و کیفیت گوشت و فراسنجه‌های خونی در جوجه‌های گوشتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار، دانشکدۀ کشاورزی دانشگاه تبریز

2 استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

3 دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

هدف از مطالعۀ حاضر تعیین تأثیرات سطوح بالای ال-آرژنین بر عملکرد رشد، فراسنجه‌های خونی و کیفیت گوشت لاشه در جوجۀ مرغ‌های گوشتی سویۀ راس در دورۀ آغازین بود. در این پژوهش 192 قطعه جوجۀ گوشتی یک‌روزه در قالب طرح کاملاً تصادفی با 4 جیرۀ غذایی (100، 153، 168 و 183 درصد آرژنین قابل‌هضم بر اساس توصیۀ کاتالوگ راس) و 4 تکرار از 1 تا 10 روزگی تغذیه شدند. در روز دهم آزمایش، وزن جوجه‌ها و مصرف خوراک آن‌ها، اندازه‌گیری و بازده خوراک محاسبه شد. همچنین 3 قطعه جوجه از هر تکرار انتخاب، خون‌گیری و کشتار شدند و وزن ماهیچۀ سینه‌ای و ران، کیفیت گوشت ماهیچۀ سینه‌ای (رنگ، pH و نیروی برش) و فراسنجه‌های خونی ارزیابی شدند. سپس داده‌ها بر اساس رویۀ GLM نرم‌افزار SAS آنالیز شدند. بر اساس نتایج، بیشترین درصد افزایش وزن 10 روزگی (33/2 درصد)، بازده خوراک (35/6 درصد) و وزن نسبی ماهیچۀ سینه‌ای (16/22 درصد) و ماهیچۀ ران (53/17 درصد) در مقایسه با گروه شاهد، در جیرۀ غذایی 168 درصد آرژنین مشاهده شد (05/0 P<). همچنین بیشترین درصد افزایش تری‌یدوتیرونین (45/60 درصد)، تیروکسین (91/26 درصد) و نسبت تری‌یدوتیرونین به تیروکسین (91/25 درصد) پلاسمایی در مقایسه با گروه شاهد، در جیرۀ غذایی 183 درصد آرژنین مشاهده شد (01/0 P<). از سوی دیگر، در جیرۀ غذایی 183 درصد آرژنین، کاهش چشمگیر درصد غلظت‌های کلسترول (93/14 درصد) و تری‌گلیسرید (19/25 درصد) پلاسما، نیروی برش (39/26 درصد) و pH ساعت 24 (05/2 درصد) و ساعت 48 (63/2 درصد) گوشت در مقایسه با گروه شاهد مشاهده شد (05/0 P<). به‌طورکلی نتایج این تحقیق نشان داد که مصرف مقدار 168 درصد آرژنین قابل‌هضم بر اساس توصیۀ کاتالوگ راس، مطلوب‌ترین نتیجه را در بهبود رشد، کمیت و کیفیت گوشت و فراسنجه‌های پلاسمایی دارد.

کلیدواژه‌ها


عنوان مقاله [English]

The effects of feeding high levels of L-arginine at the starter period on meat production and its quality, and blood parameters in broiler chicks

نویسندگان [English]

  • Marziyeh Ebrahimi 1
  • Ahmad Zare Shahneh 2
  • Mahmoud Shivazad 2
  • Zarbakht Ansari Pirsaraei 3
1 Assistant Professor, Faculty of Agricultural Science, University of Tabriz-Tabriz
2 Professor, Faculty of Agricultural Science and Engineering, University of Tehran-Karaj
3 Assistant Professor, Sari Agricultural Sciences & Natural Resources University
چکیده [English]

The objective of the present study was to determine the effects of feeding high levels of L-arginine on growth performance, blood metabolites, and carcass meat quality of female Ross broiler chickens at the starter period. In this experiment, 192 day old chicks were fed with 4 dietary treatments (100%, 153%, 168% and 183% of digestible arginine, based on the Ross catalogue recommendation) with 4 replications in a completely randomized design from day 1 to 10. On 10th day of experiment, chicks were weighed, feed consumption was recorded, and feed efficiency was calculated. Also, three chickens per replication were selected after sampling, blood were euthanized to measure breast and thigh muscle weights, meat quality of the breast muscle (color, pH, and shear force). Data were analyzed based using proc GLM of SAS software. According to the results, the highest increasing percentage for body weight (2.33%), feed efficiency (6.35%), relative weight of breast (22.16%) and thigh (17.53%) muscles were observed in diet with 168% digestible arginine relative to control group (P<0.05). Also, the highest increasing percentage in plasma triiodothyronine (60.45%), thyroxine (26.91%), and  relative triiodothyronine to thyroxine (25.91%) was observed in diet with 183% digestible arginine relative to control group (P<0.01).  On the other hand, in 183% digestible arginine group noticeable decrease in percentages of plasma cholesterol (14.93%) and triglyceride (25.19%) concentrations, shear force (26.39%) and 24 (2.05%) and 48 (2.63%) h meat pH was observed(P<0.05) relative to the control group. The overall results of this study showed that consumption level of 168% digestible arginine, as based of Ross catalogue recommendation, had the best desirable results on growth, meat quality andplasma metabolites.

کلیدواژه‌ها [English]

  • arginine
  • growth performance
  • Meat quality
  • Blood parameters
  • Broiler Chicken
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