نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران

2 دانشجوی دکتری تخصصی گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران

3 دانشیار گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران

4 استادیار بخش تحقیقات علوم دامی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گلستان، گرگان - ایران

چکیده

 اثر الگو­های مختلف تغذیه پروتئین، برعملکرد رشد، اجزای لاشه و محتوای نیتروژن بستر جوجه­هـای گوشـتی سـویه­ی تجـاری کاب 500 با استفاده از 800 جوجه در قالب طرح کاملاً تصادفی با چهار تیمار، پنج تکرار و 40 پرنده در هر تکرار بررسی شد. تیمار­های آزمایشی شامل چهار الگوی تغذیه پروتئین (بر اساس راهنمای پرورش سویه کاب، احتیاجات توصیه شده توسط NRC، 90 درصد مقدار پروتئین توصیه شـده NRC و الگوی تغذیه مرحلـه­ای) بود. اثر تیمار­های مختلف بر افزایش وزن، مصرف خوراک، انرژی مصرفی، نسبت راندمان پروتئین و اجزای لاشه معنی­دار نبود. پرندگانی که بر اساس الگوی توصیه شده راهنمای کاب تغذیه شدند ضریب تبدیل غذایی بهتری داشتند (05/0P<). نسبت راندمان انرژی در جوجه­‌های گوشتی تغذیه شده با الگوی پروتئینی راهنمای سویه کاب از سایر تیمار­ها بیشتر بود (05/0P<). مقدار نیتروژن بستر با تغذیه جوجه­های گوشتی براساس راهنمای سویه کاب، 90 درصد مقدار پروتئین توصیه شـده NRC  و خوراک­دهی مرحله­ای نسبت به الگوی پروتئینی توصیه شده NRC  کمتر بود (05/0P<). بر اساس نتایج این آزمایش، استفاده از الگوی تغذیه پروتئین بر اساس راهنمای سویه کاب برای تغذیه جوجه­های گوشتی سویه کاب مناسب­تر از سایر الگو­های مورد مطالعه می­باشد.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of different amounts of dietary protein on growth performance and carcass components of Cobb strain broilers

نویسندگان [English]

  • Behrouz Dastar 1
  • mohsen rajabzadeh nesvan 2
  • Mahmoud Shams Shargh 3
  • Mokhtar Mohajer 4

1 Professor,Department of Animal and Poultry Science, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, Golestan , Iran

2 Ph.D. Student, Department of Animal and Poultry Science, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, Golestan , Iran

3 Associate Professor, Department of Animal and Poultry Science, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, Golestan , Iran

4 Assistant Professor, Agricultural and Natural Resources and Education Center of Golestan Province, Gorgan - Iran

چکیده [English]

The effect of feeding different protein profiles on growth performance, carcass components and nitrogen content of litter in Cobb 500 broiler strain was evaluated using 800 chicks in a completely randomized design with four treatments, five replicates groups of 40 birds per each treatment. The treatments were consisted of four protein feeding profiles (based on Cobb strain nutrition guide, recommendation by NRC, 90% protein recommended by NRC and phase feeding). The effect of different treatments on body weight gain, feed intake, energy consumption, protein efficiency ratio and carcass components were not significant. The birds were fed based on Cobb strain guide had a better feed conversion ratio (P< 0.05). Energy efficiency ratio in broilers fed base on protein profile of Cobb strain guide was higher than other treatments (P< 0.05). The amount of litter nitrogen in broilers fed with base on Cobb strain guide, 90% protein recommended by NRC and phase feeding were lower than those fed base on protein profile of NRC recommendation (P< 0.05). Based on the results of this experiment, the use of protein profile base on Cobb strain is more suitable for feeding Cobb broiler chickens than other profiles.

کلیدواژه‌ها [English]

  • Amino acid
  • broiler
  • Cobb strain
  • Protein
  • phase feeding
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