نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه تغذیه دام، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان - ایران

2 استاد گروه تغذیه دام، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان - ایران

3 استادیار گروه فیزیولوژی دام، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان - ایران

4 دانشجوی دکتری گروه تغذیه دام، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان - ایران

چکیده

تأثیر تغذیه کنجاله پنبه­دانه تخمیر شده بر عملکرد، خصوصیات لاشه و پروفایل چربی سرم خون با استفاده از 300 قطعه جوجه گوشتی نر سویه راس 308 در قالب طرح کاملاً تصادفی با پنج تیمار، پنج تکرار و با 12 پرنده در هر تکرار بررسی شد. کنجاله پنبه­دانه با کشت مخلوط مایع حاوی باسیلوس سابتیلیس، آسپرژیلوس نایجر و آسپرژیلوس اوریزا به نسبت یک به 2/1 تخمیر شد. پس از هفت روز تخمیر، مقدار گوسیپول آزاد از 33/584 به 68 میلی­گرم در کیلوگرم کنجاله کاهش یافت. تیمارهای آزمایش شامل جایگزینی صفر، 10 و 20 درصد کنجاله پنبه­دانه خام و یا تخمیری با کنجاله سویا در جیره غذایی بود.استفاده از کنجاله پنبه­دانه تخمیری در مقایسه با کنجاله پنبه­دانه خام در جیره سبب بهبود افزایش وزن و ضریب تبدیل خوراک در جوجه­های گوشتی شد (05/0>P). در 21 و 42 روزگی، افزایش وزن و ضریب تبدیل خوراک در پرنده­های تغذیه شده با جیره­های حاوی 10 و 20 درصد کنجاله پنبه­دانه تخمیری اختلاف معنی­داری با پرنده­های تغذیه شده جیره شاهد نداشت. چربی محوطه بطنی در جوجه­هایی که با جیره حاوی کنجاله پنبه­دانه تخمیری تغذیه شدند، از سایر پرندگان کمتر بود (05/0>P). غلظت کلسترول و تری­گلیسرید سرم خون در گروه­های تغذیه شده با جیره­های حاوی کنجاله پنبه­دانه تخمیری به طور معنی­داری کمتر از سایر گروه­ها بود (05/0>P). براساس نتایج حاصل، استفاده از کنجاله پنبه­دانه تخمیری در مقایسه با کنجاله پنبه­دانه خام عملکرد و سلامت جوجه­های گوشتی را بهبود می­بخشد.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of feeding fermented cottonseed meal on growth performance, carcass characteristics and blood serum lipid profile of broiler chickens

نویسندگان [English]

  • vahid Jazi 1
  • Fathollah Boldaji 2
  • Behrouz Dastar 2
  • Seyed Reza Hashemi 3
  • Amin Ashayerizadeh 4

1 M.Sc. Student, Department of Animal nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

2 Professor, Department of Animal Nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

3 Assistant Professor, Department of Animal Physiology, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

4 Ph.D. Student, Department of Animal Nutrition, Faculty of Animal Sciences, Agricultural Science and Natural Resources University of Gorgan, Iran

چکیده [English]

The effect of feeding fermented cottonseed meal on performance, carcass characteristics and blood serum lipid profile was studied in a completely randomized design with five treatments, five replicates and 12 birds per replication using 300 male Ross 308 broiler chicks. Raw cottonseed meal was fermented with a liquid mixed culture containing Bacillus subtilis, Aspergillus niger and Aspergillus oryzae with a ratio of 1:1.2. After seven days of fermentation, free gossypol was reduced from 584.33 to 68 mg/kg. The experimental treatments included replacing 0, 10, and 20 percent of the raw or fermented cottonseed meal by the soybean meal in the diet. The use of fermented cottonseed meal in the diet improved weight gain and feed conversion ratio of broilers compared to the raw cottonseed meal (P<0.05). At 21 and 42 d, weight gain and feed conversion ratio of the birds fed diets containing 10 and 20 percent of fermented cottonseed meal did not have a significant difference with the birds fed by the control diet. Abdominal fat was lower in birds fed diets containing fermented cottonseed meal compared with the others (P<0.05). Serum concentrations of cholesterol and triglyceride were significantly lower for the birds fed by diets containing fermented cottonseed meal, compared with the other groups (P<0.05). Based on the results, the use of fermented cottonseed meal improves the performance and health of broiler chickens compared to the raw cottonseed meal.

کلیدواژه‌ها [English]

  • Bacillus subtilis
  • broiler
  • Cottonseed meal
  • Free gossypol
  • Performance
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