تأثیر مکمل‌ بستر بنتونیت سدیم و تراکم گله بر عملکرد جوجه‌های گوشتی و کیفیت بستر در تابستان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران

2 دانشجوی دکتری، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران

چکیده

این آزمایش به­منظور بررسی تأثیر مکمل بستر بنتونیت­سدیم و تراکم گله بر عملکرد و کیفیت بستر با استفاده از 252 قطعه جوجۀ ­گوشتی در قالب طرح کامل تصادفی با شش تیمار به­صورت فاکتوریل (2×3) و چهار تکرار انجام ­شد. عامل‌های آزمایشی شامل تراکم در واحد سطح (14؛ تراکم کم و 18؛ تراکم زیاد / پرنده در هر مترمربع) و سه سطح مکمل بستر بنتونیت­سدیم (0، 2 و 4 کیلوگرم در هر مترمربع) بودند. افزایش تراکم سبب افت عملکرد رشد، افزایش رطوبت، pH، شمار اشریشیاکلی و اووسیست بستر، نمرة زخم‌های روده­، زخم کف پا، مفصل خرگوشی و زخم سینه شد (01/0>P). رطوبت بستر و نمرة زخم کف پا و مفصل خرگوشی با افزودن 2 کیلوگرم مکمل ­بستر کاهش یافت (01/0>P). افزودن چهار کیلوگرم بنتونیت­سدیم سبب کاهش شمار اشریشیاکلی و نیتروژن بستر و بهبود افزایش وزن جوجه­ها نسبت به گروه­ شاهد شد (01/0>P). اثر متقابل تراکم و مکمل ­بستر برای نمرة زخم‌های کف پا و مفصل خرگوشی (35 روزگی) معنی­دار بود (05/0>P) به­طوری­که در تراکم کم زخم‌های ناچیز بود و افزودن مکمل ­بستر تأثیری بر آن نداشت اما زخم‌های پا ناشی از تراکم بالا با افزودن 4 کیلوگرم مکمل ­بستر کاهش یافت. نتایج نشان می­دهد که افزودن مکمل بستر بنتونیت­سدیم تأثیر مثبتی بر عملکرد جوجه‌های گوشتی و کیفیت بستر داشت.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of sodium bentonite litter supplement and stocking density on growth performance of broiler and litter quality in summer

نویسندگان [English]

  • Maziar Mohiti-Asli 1
  • Moein Ghanaatparast-Rashti 2
  • Meysam Tavakoli-Alamooti 2
1 Assistant Professor, Department of Animal Science, Faculty of Agriculture Science, University of Guilan, P.O. Box 41635-1314, Rasht, Iran
2 Ph.D. Student, Department of Animal Science, Faculty of Agriculture Science, University of Guilan, P.O. Box 41635-1314, Rasht, Iran
چکیده [English]

This experiment was conducted to determine the effects of sodium bentonite litter supplement and stoking density on performance and litter quality using a total of 252 broiler chicks in completely randomized design with 6 treatments which were arranged factorially (3×2) and 4 replicates. Experimental factors included: stocking density (14; low and 18; high /birds per m2) and three levels of sodium bentonite litter supplement (0, 2 and 4 kg/m2). Higher stocking density led to lower performance, higher moisture, pH, count of E.coli and oocysts in litter, intestinal lesions score, footpad and hock lesion scores and breast blister (P<0.01).  Litter moisture and footpad and hock scores were reduced by application of 2 kg/m2 litter supplement (P<0.01). Supplementation of 4 kg/m2 sodium bentonite decreased count of E. coli and nitrogen in litter and improved body weight gain of broilers than control (P<0.01). Interactions between stocking density and litter supplement for footpad and hock scores (35 day of age) were significant (P<0.05) as lesions were negligible in lower stocking density without any effect by litter supplement, although the lesions induced by higher density were reduced using 4 kg/m2 litter supplement. Results indicated that application of sodium bentonite as litter supplement had beneficial effects on broilers performance and litter quality.

کلیدواژه‌ها [English]

  • broiler
  • litter quality
  • performance
  • Sodium Bentonite
  • Stocking Density

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سابقه مقاله

  • تاریخ دریافت: 30 آبان 1394
  • تاریخ بازنگری: 14 تیر 1395
  • تاریخ پذیرش: 25 تیر 1395

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