تأثیر استفاده از پسماند گیاهان دارویی در جیره های با نسبت های گوناگون اسیدهای چرب امگا-6 به امگا-3 بر عملکرد مرغ‌های تخم گذار

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان، اصفهان‌ـ‌ایران

2 استادیار گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان، اصفهان‌ـ‌ایران

3 دانشیار گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان، اصفهان‌ـ‌ایران

چکیده

تأثیر مخلوط پسماند گیاهان آویشن، رزماری، شوید و نعناع فلفلی در جیره‏های با نسبت‏های گوناگون اسیدهای چرب امگا-6 به امگا-3 بر عملکرد، وزن نسبی اندام‏های داخلی، فلور میکروبی محتویات ایلئوم و تغییرات هسیتولوژیک رودۀ کوچک و کبد مرغ‏های تخم‏گذار در آزمایشی فاکتوریل 3×2 با سه سطح پسماند (صفر، 5/2 و 5 درصد) و دو نسبت اسیدهای چرب امگا-6 به امگا-3 (12/15 و 65/1) در قالب طرح کاملاً تصادفی با شش تیمار، چهار تکرار و پنج پرنده در هر تکرار بررسی شد. تغذیۀ مرغ‏ها با جیره‏های با نسبت پایین امگا-6 به امگا-3 وزن نسبی طحال، تعداد و قطر غدد لنفاوی غیرمنتشرۀ لامیناپروپریا (05/0P<)، و درصد تولید تخم‏مرغ در میان دورۀ دوم (05/0P=) را افزایش و وزن نسبی و درصد چربی کبدی را کاهش داد (05/0P<). تغذیۀ پرندگان با جیره‏های حاوی پسماندهای گیاهی، طول پرز، تعداد و قطر غدد لنفاوی، تعداد سلول‏های گابلت (05/0P<)، و ضریب تبدیل غذایی (08/0P=) را بهبود داد. غلظت مالون دی‏آلدئید در کبد و جمعیت اشرشیاکلی در ایلیوم پرندگانی که با جیرۀ حاوی 5درصد مخلوط پسماند تغذیه شدند، کاهش یافت (01/0P<). براساس نتایج تحقیق حاضر، استفاده از نسبت پایین اسیدهای چرب امگا-6 به امگا-3 یا 5درصد مخلوط پسماند گیاهان دارویی در جیره به‌ترتیب تولید تخم‏مرغ و شاخص‌های سلامت روده و کبد را در مرغ‏های تخم بهبود می‏بخشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of dietary inclusion of medicinal plants’ by-product mixture on performance of laying hens receiving different omega-6 to omega-3 ratios

نویسندگان [English]

  • Seyede Asma Mousavi 1
  • Seyed Amir Hossein Mahdavi 2
  • Ahmad Riasi 3
  • Ali Sadeghi-Sefidmazgi 2
1 M.Sc. Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
2 Assistant Professor, Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
3 Associate Professor, Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The effects of dietary inclusion of medicinal plants’ by-product mixture on performance, the relative internal organ weight, ileal microbial counts, and small intestinal and liver morphologic alterations in laying hens receiving different omega-6 to omega-3 ratios as a 2×3 factorial arrangements with three levels of plants’ by-product (zero, 2.5 and five percent) and two omega-6 to omega-3 ratios based on completely randomized design containing six treatments with four replicates of five birds each. Feeding low dietary omega-6 to omega-3 ratio to hens led to a significant increase in the relative spleen weight, the number and diameter of lamina propria lymphoid follicles and middle egg production percentage (P=0.05), and a reduction in the relative liver weight and hepatic fat percentage (P<0.05). Furthermore, dietary inclusion of plants’ by-product mixture improved villi height, the numbers and diameter of lamina propria lymphoid follicles, the number of goblet cells (P<0.05) as well as feed conversion ratio (P=0.08). Hepatic malondialdehyde concentration and ileal Escherichia coli population was decreased (P<0.01) in hens given plants’ by-product mixture. Therefore, our findings indicated that low dietary omega-6 to omega-3 ratio could improve egg production slightly, and administration of five percent of medicinal plants’ by-product mixture as a result of synergistic effect expressions could improve intestinal and hepatic health indices as well as feed conversion ratio in laying hens.

کلیدواژه‌ها [English]

  • histological alterations
  • laying hens
  • medicinal plants’ by-product mixture
  • omega-6 to omega-3 ratio
  • performance
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