نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

2 استادیار گروه علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

3 دانشیار گروه علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

اثر سطوح گوناگون لسیتین سویا بر عملکرد و فراسنجه‌های بیوشیمیایی خون جوجه‌های گوشتی، با استفاده از 180 قطعه جوجه‌خروس گوشتی سویۀ راس 308 به‌مدت 47 روز بررسی شد. جیره‌های آزمایشی برای سه دوره پرورش آغازین، رشد، و پایانی با استفاده از نه سطح لسیتین سویا (صفر، 2/0، 4/0، 6/0، 8/0، یک، 2/1، 4/1، 6/1 درصد) به‌نحوی تهیه شدند که انرژی قابل سوخت‏وساز، پروتئین خام و سایر مواد مغذی در آنها یکسان بود. به‌منظور ارزیابی فراسنجه‌های بیوشیمیایی خون شامل کلسترول، تری‌گلیسرید، لیپوپروتئین با چگالی زیاد و لیپوپروتئین با چگالی کم، خون‌گیری از جوجه‌ها در 41روزگی انجام شد. صفات افزایش وزن، خوراک مصرفی، و ضریب تبدیل غذایی در پایان دوره‌های گوناگون بررسی شد. اثر سطوح متفاوت لسیتین بر افزایش وزن، خوراک مصرفی و ضریب تبدیل غذایی در دوره‏های گوناگون پرورش و کل دوره معنی‌دار نبود. با افزایش سطح لسیتین در جیره، میزان کلسترول، تری‌گلیسرید و لیپوپروتئین با چگالی کم کاهش پیدا کرد، ولی میزان لیپوپروتئین با چگالی زیاد خون افزایش یافت (05/0>P). درنتیجه، لسیتین توانست پروفیل لیپیدهای خون را در جوجه‌‌ها به‏طور معنی‌دار تغییر دهد، درحالی‏که اثر معنی‌داری بر عملکرد نداشت.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of different levels of soybean lecithin on performance and blood lipids of broiler chicks

نویسندگان [English]

  • Hanieh Sadat Banikamal 1
  • Mahdi Zhandi 2
  • Malak Shakeri 2
  • Hossein Moravej 3

1 Former Master Students, Department of Animal Science, Faculty of Science and Agricultural Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 Assistant, Department of Animal Science, Faculty of Science and Agricultural Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Associated Professors, Department of Animal Science, Faculty of Science and Agricultural Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

چکیده [English]

This study was conducted to investigate the effects of different levels of soybean lecithin on performance and blood lipids of broiler chicks. A total of 180 one day old Ross 308 broiler chicks were used in a completely randomized design with nine treatments (diets with 0, 0.2, 0.4, 0.6, 0.8, 1, 1.2, 1.4 and 1.6 percent of soybean lecithin) and four replicates for 47 days-rearing period. In order to evaluate the biochemical factors of blood including cholesterol, triglyceride, high density lipoprotein and low density lipoprotein, blood sampling from chickens were taken in day 41. The traits of weight gain, feed intake and feed conversion ratio were evaluated at the end of each period. The results showed that different levels of soybean lecithin had no significant effect on weight gain, feed intake and feed conversion ratio traits during each period. Increasing in the level of lecithin, decreased the concentration of cholesterol, triglyceride and low density lipoprotein and increased the high density lipoprotein concentration in blood plasma (P<0.05). In conclusion, dietary inclusion lecithin up to 1.6 percent, have no any effect on broiler performance, but could reduce cholesterol, triglyceride, and low density lipoprotein and increase high density lipoprotein in blood’s plasma.

کلیدواژه‌ها [English]

  • blood lipoprotein
  • cholesterol
  • feed conversion ratio
  • phosphatidylcholine
  • Triglycerides
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