The effects of date presscakes supplemented with exogenous enzyme on the growth performance, gastrointestinal and nutrient digestibility of broiler chicks


Department of Animal Science, Agricultural College, Shahid Bahonar University of Kerman, Kerman, Iran


ABSTRACT- This study was designed to investigate the effects of adding different levels of date presscakes (DP), with and without enzyme supplementation (ES), on the ileal digestibility and growth performance of broiler. A completely randomized design containing 2 × 5 factorial arrangement of treatments (with and without enzyme supplementation and 5 levels of DP) was used. The enzyme complex contained 3500 U ß –glucanase, 600 U xylanase and 10.2 U cellulase activities per g of product. Five experimental diets with similar composition as the control were prepared by partial replacements of corn by DP at the levels of 0, 25, 50, 75 and 100 g/kg diet. Day-old male broiler chicks were allocated into 40 cages at random (4 replicates per treatment, 10 birds per cage). Body weight gain, feed intake, feed conversion ratio and apparent ileal digestibility of nutrients were determined. Substitution of corn by 75 and 100g DP/kg increased (linear, P<0.05) the body weight gain and feed intake. Enzyme supplementation of the diets at 50, 75 and 100g DP/kg improved (P<0.05) the daily gain of birds as compared with the birds that were fed the control diet without enzyme. Enzyme supplementation at 0, 50 and 75 g DP/kg diet improved (P<0.05) the crude protein digestibility. The data indicated that DP with ES, included at the levels of up to 100g/kg diet might enhance the growth performance of broilers..


Article Title [Persian]

تاثیر لرد خرما با آنزیم بر عملکرد رشد، دستگاه گوارش و قابلیت هضم مواد مغذی در جوجه های گوشتی

Authors [Persian]

  • محسن افشارمنش
  • خوبیار دهقانی
  • زهره مهدی پور
گروه علوم دامی، دانشکده کشاورزی، دانشگاه کرمان، کرمان، ج. ا. ایران.
Abstract [Persian]

چکیده- این آزمایش به منظور بررسی مقایسه سطوح مختلف لرد خرما با و بدون آنزیم بر صفات عملکردی رشد در جوجه های گوشتی انجام شد. 5 جیره آزمایشی با ترکیبات مواد مغذی مشابه با جیره شاهد آماده شد که قسمتی از ذرت در جیره شاهد با سطوح مختلفی از لرد خرما جایگزین شد (0، 25، 50 و 100 گرم/کیلوگرم). جوجه های گوشتی نر یکروزه به طور تصادفی در 40 قفس قرار داده شدند (4 تکرار برای هر تیمار و 10 پرنده در هر قفس) و جوجه ها تا سن 42 روزگی با جیره های آزمایشی مربوطه تغذیه شدند. وزن بدن، مصرف خوراک و ضریب تبدیل در صول دوره آزمایش ثبت گردید. در پایان دوره قابلیت هضم ظاهری مواد مغذی اندازه گیری شد. نتایج نشان دادند، مصرف جیره هایی که با 75 و 100 گرم لرد خرما /کیلوگرم جایگزین شده بودند، وزن بدن و مصرف خوراک بالاتری داشتند (05/0>P ). پرندگانی که جیره هایی با 50، 75 و 100 گرم لرد خرما /کیلوگرم همراه با آنزیم دریافت کرده بودند، نسبت به گروه شاهد بدون آنزیم، اضافه وزن روزانه بهتری داشتند (05/0>P )، همچنین در این گروه ها قابلیت هضم پروتئین خام بهبود یافته بود(05/0>P ). نتایج نشان دادند که جایگزینی لرد خرما تا سطح 100 گرم/کیلوگرم، همراه با آنزیم می تواند صفات عملکردی رشد را بهبود دهد.

Keywords [Persian]

  • واژه‏های کلیدی:
  • جوجه گوشتی
  • عملکرد
  • لرد خرما
  • قابلیت هضم پروتیین
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