نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشگاه محقق اردبیلی - تخصص:‌تغذیه نشخوارکنندگان

چکیده

اثر عصاره­ هیدروالکلیدو گونه آویشن و فلاوومایسین برگوارشپذیریمواد مغذی و وضعیت آنتیاکسیدانی جوجه های گوشتی، با استفاده از 128قطعهجوجه یک‌ر­وزهسویهراس308درقالب طرحکاملاً تصادفی با چهار تیمار، چهاربررسی شد. تیمارها شامل شاهد، 05/0 درصد عصاره­ آویشن دنائی، 05/0 درصد عصاره آویشن کوهی و 1/0 درصد فلاوومایسین بودند. جوجههایی که در جیره خود فلاوومایسین دریافت کردند، افزایش وزن و ضریب تبدیل بهتری داشتند (05/0p<). تغذیه جیره‌های حاوی آویشن اثری بر افزایش وزن نداشت ولی پرندگانی که  جیره حاوی  عصاره آویشن دنائی دریافت کردند، ضریب تبدیل بهتری نسبت به گروه شاهد داشتند (05/0p<). ارتفاع پرز و نسبت ارتفاع پرز به عمق کریپت در ژژنوم پرندگانی که با جیره حاوی عصاره آویشن دنائی و یا  فلاوومایسین تغذیه شدند، بیشتر بود(05/0p<). سطح پرزها در ژژنوم پرندگانی که با جیره‌های حاوی افزودنی تغذیه شدند، افزایش یافت(05/0p<). تغذیه جوجه‌ها با جیره‌های حاوی عصاره آویشن دنائی و فلاوومایسین سبب کاهش ضخامت لایه ماهیچه­ای در ژژنوم آنها شد (05/0p<). گوارش­پذیری ماده­ خشک و ماده آلی با مصرف عصاره آویشن کوهی و فلاوومایسین افزایش یافت (05/0p<). ابقای نیتروژن در پرندگانی که جیره‌های حاوی افزودنی دریافت کردند، بیشتر از پرندگان شاهد بود (05/0p<). فعالیت سوپراکسید دیسموتاز و گلوتاتیون پراکسیداز خون پرندگان تغذیه‌شده با عصاره آویشن بیشتر از پرندگان شاهد بود (05/0p<). میزان مالون­ دی­آلدئید گوشت ران پرندگان دریافت‌کننده جیره حاوی عصاره آویشن کوهی در مقایسه با سایر تیمارها کاهش یافت (05/0p<). بر اساس نتایج این تحقیق،  استفاده از  05/0 درصد عصاره آویشن دنائی در جیره جوجه‌های گوشتی ضریب تبدیل خوراک، شاخصهای ریخت­سنجی مخاط روده و وضعیت آنتی­اکسیدانی بدن  را بهبود می­بخشد و میتواند به‌عنوان یک ترکیب محرک رشد پیشنهاد شود.

کلیدواژه‌ها

عنوان مقاله [English]

The Effect of Two Thyme Species Hydroalcoholic Extract on Nutrient Digestion and Antioxidant Status of Broiler Chickens

نویسندگان [English]

  • Mohammad Malekzadeh 1
  • Mir Daryoush Shakouri 1
  • Hossein Abdi Benemar 2

1 Department of Animal Science, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

2 Department of Animal Science, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili,

چکیده [English]

The effect of two thyme species hydroalcoholic extracts and flavomycin on nutrients digestibility and antioxidant status of male broilers was assessed in a 42-day trial using 128-day-old Ross 308 chicks by employing a completely randomized design with four treatments and four replicates. The experimental treatments consisted of control, 0.05 percent Thymus daenensis extract, 0.05 percent T. kotschyanus extract and 0.1 percent flavomycin. Throughout the experiment, the chickens on flavomycin diet had a better weight gain and feed conversion ratio (P<0.05). Although thyme diets had no effect on weight gain, the birds on diet containing T. daenensis extract had better feed conversion ratio than those on the control diet (P<0.05). The jejunal villus height and villus height to crypt depth ratio increased in birds fed with diets containing T. daenensis extract and flavomycin (P<0.05). However, villus surface area of jejunum was increased in birds on diets containing the additives (P<0.05). Feeding chickens with diets containing T. daenensis extract and flavomycin decreased the thickness of muscle layer of jejunum (P<0.05). Digestibility of dry matter and organic matter was increased by T. kotschyanus extract and flavomycin (P<0.05).Nitrogen retention was increased in birds fed with all additives (P<0.05). The activity of blood superoxide dismutase and glutathione peroxidase in birds receiving thyme extract was higher than those of the control group (P<0.05). Malondialdehyde of thigh meat declined in birds receiving diets containing T. kotschyanus extract in comparison with other treatments (P<0.05). Based on the results of the study such as improved feed conversion ratio, intestinal mucosal morphometry and body immune status parameters, application of 0.05 percent T. daenensis extract can be suggested as a growth promoter in broiler diets.

کلیدواژه‌ها [English]

  • Flavomycin
  • Glutathione peroxidase
  • Malondialdehyde
  • Morphometry
  • superoxide dismutase
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