تأثیر سطوح مختلف انرژی بر عملکرد، اجزای لاشه و برخی فراسنجه‌های خونی در جوجه‌های گوشتی نر سویۀ آرین در شرایط القای آسیت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری تغذیۀ طیور، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

2 استاد گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

چکیده

در این آزمایش با استفاده از طرح بلوک­های کامل تصادفی تأثیر سه سطح انرژی در چهار تکرار شامل؛ 1-سطح انرژی جیره برابر راهنمای سویۀ آرین، 2-کاهش سطح انرژی جیره به میزان 100 کیلوکالری در دورۀ آغازین و 150 کیلوکالری در دورۀ رشد و پایانی نسبت به راهنمای سویۀ آرین، 3- کاهش سطح انرژی جیره به میزان 200 کیلوکالری در دورۀ آغازین و 300 کیلوکالری در دورۀ رشد و پایانی نسبت به راهنمای سویۀ آرین بر عملکرد و پیشگیری از عارضۀ آسیت 60 قطعه جوجۀ گوشتی نر در طول شش هفته بررسی شد. در طول آزمایش وزن بدن، خوراک مصرفی، ضریب تبدیل غذایی، درصد تلفات و شاخص تولید تعیین شد. در 35 روزگی هماتوکریت و فراسنجه­های خونی اندازه­گیری شد. در پایان آزمایش ویژگی­های لاشه و نسبت بطن راست به کل بطن تعیین و مقایسه شد. کاهش سطح انرژی جیره افزایش وزن بدن و مصرف خوراک را افزایش داد (05/0>P). هزینۀ خوراک به ازای هر کیلوگرم افزایش وزن با کاهش سطح انرژی جیره کاهش یافت (05/0>P). کاهش انرژی جیره مقادیر هموگلوبین، و هماتوکریت را کاهش داد (05/0>P) و سطح کورتیکواسترون افزایش یافت (05/0>P). هورمون T3 تحت تأثیر کاهش انرژی جیره قرار نگرفت ولی T4 با کاهش سطح انرژی جیره افزایش یافت (05/0>P) و همچنین نسبت T3 به T4 با کاهش سطح انرژی جیره کاهش یافت (05/0>P). با توجه به نتایج کاهش سطح انرژی جیره به‌صورت تیمار شمارۀ 2 (یادشده در بالا) از لحاظ عملکرد و شاخص‌های مرتبط به آسیت بهتر از دو گروه دیگر بود.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of different levels of dietary energy on performance, carcass components and some blood parameters in Arian male broiler chickens in the inducing ascites

نویسندگان [English]

  • Behzad Sadighi Sheykh-hasan 1
  • Mahmood Shivazad 2
  • Mojtaba Zaghari 2
چکیده [English]

In this study 60 Arian male chickens for six weeks were used in a completely randomized block to evaluate the effect of three dietary energy level on performance and prevention ascites. Diets energy levels were: as catalog; 100 and 150 kcal lower in starter and grower and finisher periods; 200 kcal and 300 kcal lower in starter and grower that catalog respectively. During the experiment, body weight, feed intake, feed conversion ratio, mortality rate and production index were determined. Hematocrit and blood parameters were measured at 35 days of age. At the end of the experiment, carcass characteristics and the right ventricle (RV) weight and total ventricle (TV) weight ratios were determined and compared. Reducing dietary energy level was increased body weight gain and feed intake (P<0.05). Feed cost per kg of weight gain was reduced by reducing dietary energy level (P<0.05). Reducing dietary energy level decreased the amount of hemoglobin and hematocrit (P<0.05) and increased the cortisol level (P<0.05). T3 hormone was not affected by diet energy, but T4 was increased by Reducing dietary energy (P<0.05). Also T3 to T4 ratios was reduced by Reducing dietary energy (P<0.05). Results showed that reducing 100 kcal diet energy in starter and 150 kcal in the grower and finisher periods than the Arian catalog was performed better than the other two energy levels on performance and parameters related to ascites.

کلیدواژه‌ها [English]

  • ascites
  • dietary energy
  • growth performance
  • male broiler chickens

مراجع

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سابقه مقاله

  • تاریخ دریافت: 24 خرداد 1394
  • تاریخ بازنگری: 26 تیر 1395
  • تاریخ پذیرش: 24 دی 1394

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