نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، بخش علوم دامی، دانشکده کشاورزی، دانشگاه شیراز،‏ ایران

2 دانش آموخته کارشناسی ارشد، بخش علوم دامی، دانشکده کشاورزی، دانشگاه شیراز،‏ ایران

چکیده

این پژوهش به منظور بررسی روش فرآوری سورگوم دانه‌ای و روش جیره‌نویسی بر عملکرد و قابلیت هضم مواد مغذی با استفاده از 320 قطعه جوجه گوشتی (هشت روزه) در یک آزمایش فاکتوریل 2 × 2 × 2 با دو روش جیره‌نویسی (اسیدآمینه کل و قابل هضم)،فرآوری با پلی‌وینیل پیرولیدون (PVP، صفر و یک درصد) و اسید آلی (صفر و دو درصد مخلوط اسید استیک و اسید پروپیونیک با نسبت 60 به 40) در قالب طرح کاملاً تصادفی با هشت تیمار، چهار تکرار و 10 پرنده در هر تکرار انجام شد. اثر اصلی استفاده از جیره‌نویسی به روش قابل هضم، افزودن اسید و PVP در دوره پایانی (22 تا 42 روزگی) و کل دوره (هشت تا 42 روزگی) باعث بهبود ضریب تبدیل خوراک و افزایش وزن روزانه و اثر اصلی روش جیره‌نویسی قابل هضم و افزودن اسید سبب بهبود گوارش‌پذیری مواد مغذی شد (05/0 ≥P). اثر افزودن اسید و PVP سبب کاهش وزن پانکراس شد (05/0 ≥P). برهم‌کنش PVP، اسید و روش جیره‌نویسی در هیچ‌یک از دوره‌های پرورش بر ویژگی‌های عملکرد معنی‌دار نبود. براساس نتایج تحقیق حاضر، تنظیم جیره براساس اسیدهای آمینه قابل هضم هنگام استفاده از سورگوم دانه‌ای در جیره‌های جوجه‌های گوشتی، به‌دلیل عدم نیاز به هزینه‌های اضافی برای فرآوری سورگوم دانه‌ای و دارا بودن نتایج عملکردی مشابه با جیره‌های فرآوری شده قابل توصیه است.

کلیدواژه‌ها

عنوان مقاله [English]

Improvement in sorghum grain digestibility by removing tannin and feed formulation method using standardized amino acid digestibility in broilers

نویسندگان [English]

  • Mohammad Reza Rezvani 1
  • Karim Hoshyar 2

1 Assistant Professor, Department of Animal Science, Faculty of Agriculture, Shiraz University, Iran

2 M.Sc. Graduated Student, Department of Animal Science, Faculty of Agriculture, Shiraz University, Iran

چکیده [English]

The aim of this study was to investigate the processing methods of sorghum grain and diet formulation on performance and nutrients digestibility in broilers. Three hundred and twenty chicks at eight day of age were allotted into eight groups of four replicate with ten chicks per replicate. This research was conducted as completely randomized design arranged in a 2 × 2 × 2 factorial experiment using formulation method (total vs. digestible amino acids), Polyvinylpyrrolidone (PVP, 0 vs. 1%) and acid treatment (0 vs. 2%, acetic and propionic acid, 60:40 mixture). Main effects of addition of PVP and acid treatment of sorghum and formulation based on digestible amino acids significantly improved feed conversion ratio and average daily gain during the finishing period (22 to 42 d.) and the overall feeding periods (8 to 42 d.; P≤0.05). Also, acid treatment of sorghum and formulation based on digestible amino acid significantly improved nutrients digestibility during the finishing period (22 to 42 d.) and the overall feeding periods (8 to 42 d.) (P≤0.05). Addition of PVP or acid treatment resulted in a decrease in the weight of pancreas (P≤0.05). The interaction effect of PVP, acid and method of diet formulation was not significant on any performance parameters. The data showed that diet formulation based on digestible amino acid can be more advisable in comparison to sorghum grain processing methods. It can be because of no need for additional processing costs and having the same performance results.

کلیدواژه‌ها [English]

  • Acetic acid
  • Carcass
  • Performance
  • polyvinylpyrrolidone
  • Propionic acid
  • Tannins
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