نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه لرستان، خرم آباد، ایران

2 دانشگاه لرستان، تخصص: تغذیه نشخوارکنندگان/ سیستم های ارزشیابی خوراک/ فرآوری مواد خوراکی/ مدلسازی در علوم دامی/ دام های کوچک و بزرگ

3 گروه علوم دامی، دانشکده کشاورزی، دانشگاه لرستان، ایران

چکیده

تأثیر افزودن سبوس برنج بر عملکرد رشد، خصوصیات لاشه، قابلیت هضم ایلئومی مواد مغذی و برخی فراسنجه­های خونی جوجه‏های گوشتی با استفاده از 240 قطعه جوجه گوشتی (مخلوط نر و ماده) یک­روزه سویه راس در قالب طرح کاملاً تصادفی با چهار تیمار، پنج تکرار و 12 قطعهدر هر تکرار بررسی شد. تیمارهای آزمایشی شامل جیره شاهد و جیره­های حاوی 5/2، پنج و 5/7 درصد سبوس برنج بودند. نتایج این مطالعه نشان داد که اگرچه در تمامی سطوح مصرفی، افزودن سبوس برنج به جیره باعث کاهش معنی­داری در میزان خوراک مصرفی و افزایش وزن روزانه در طول دوره آغازین، رشد و در کل دوره پرورش شد (05/0>P ولی تاثیر نامطلوبی بر ضریب تبدیل خوراک و شاخص کارایی تولید جوجه­های گوشتی در کل دوره پرورش نداشت. اگرچه افزودن سطح پنج درصد سبوس برنج باعث افزایش معنی­دار وزن نسبی دوازدهه و ایلئوم نسبت به گروه شاهد شد (05/0>P) ولی این افزایش سبب بهبود قابلیت هضم مواد مغذی نشد. وزن نسبی کبد با افزودن سبوس برنج به جیره­ جوجه­های گوشتی به صورت خطی افزایش یافت (05/0>P)، ولی وزن نسبی بورس فابریسیوس در جوجه­­های تغذیه شده با جیره­های جاوی سبوس برنج تفاوت معنی­داری با جوجه­های گروه شاهد نداشت (05/0<P). تغذیه جوجه­ها با جیره حاوی 5/7 درصد سبوس برنج، غلظت گلوکز سرم خون را به طور معنی­داری در مقایسه با جوجه­های تغذیه شده با جیره­های حاوی 5/2 و 5 درصد سبوس برنج افزایش داد (05/0>P). افزودن سبوس برنج به جیره، غلظت کلسترول و VLDLسرم خون جوجه­های گوشتی را به طور خطی افزایش داد (05/0>P). نتایج این مطالعه نشان داد که، استفاده از سبوس برنج به صورت خام و بدون فرآوری در جیره جوجه‏های گوشتی مناسب نیست.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of dietary inclusion of rice bran on production performance and ileal digestibility of nutrients in broiler chickens

نویسندگان [English]

  • Hasan Dalvand 1
  • Arash Azarfar 2
  • abbas masoudi 3

1 Animal Science department, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

3 Department of Animal Science, Faculty of Agriculture, University of Lorestan, Khorramaabad, Iran

چکیده [English]

Effects of dietary inclusion of rice bran on production performance, carcass characteristics, ileal digestibility of nutrients and some blood parameters were studied using 240 day-old (mixture of male and female chickens) Ross broiler chicken which assigned in a completely randomized design to four treatments with five replicates of 12 birds each. The experimental treatments included control diet and diets containing 2.5, five and 7.5% of rice bran. The results of this study showed that although dietary inclusion of rice bran for all inclusion levels resulted in significant reduction (P<0.05) in feed consumption and daily gain in starter, grower and entire rearing period, it had no undesirable effects on feed conversion ratio and production efficiency index for the entire rearing period. Even though the addition of rice bran at level of 5% caused significant increase (P<0.05) in relative weight of duodenum and ileum in comparison with control group, this increase did not lead to improved digestibility of nutrient. Dietary inclusion of rice bran linearly increased the relative weight of liver (P<0.05), but the relative weight of Bursa of Fabricius in chicks fed diets containing rice bran was not significantly different with that of in control birds (P>0.05). Feeding chicks with diets containing 7.5% rice bran significantly elevatedserum concentration of glucose compared with those fed diets containing 2.5 and 5% rice bran (P<0.05). Dietary inclusion of rice bran linearly increased serum concentrations of cholesterol and VLDL in broiler chicks (P<0.05). The results of current study showed that dietary inclusion of raw rice bran without any processing in the diet of broiler chickens is not appropriate.

کلیدواژه‌ها [English]

  • Blood serum
  • Chickens
  • diets
  • insoluble fiber
  • internal organs

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