علوم دامی ایران

علوم دامی ایران

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

نوع مقاله : مقاله پژوهشی

نویسندگان
مازیار محیطی اصلی 1
معین قناعت پرست رشتی 2
میثم توکلی الموتی 2
1 استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران
2 دانشجوی دکتری، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران
10.22059/ijas.2016.59799
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
بنتونیت سدیم
تراکم پرنده
جوجۀ گوشتی
کیفیت بستر
عملکرد

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