اثرات استفاده از برنامه‌‌ دوره‌ای محدودیت غذایی بر عملکرد رشد و فراسنجه‌‌های خونی در جوجه‌‌های گوشتی سویه راس- 308

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه علوم دامی، واحد مراغه، دانشگاه آزاد اسلامی، مراغه، ایران

10.22034/AEJ.2021.289445.2551

چکیده

آزمایش حاضر جهت بررسی اثرات برنامه‌‌های دوره‌ای مختلف محدودیت غذایی بر عملکرد رشد و فراسنجه‌‌های خونی جوجه‌‌های گوشتی راس- 308 انجام گرفت. تعداد 192 قطعه جوجه (مخلوط نر و ماده) از سن 10 تا 42 روزگی در 4 تیمار، 4 تکرار و 12 قطعه جوجه در هر تکرار در دوره‌های آزمایشی رشد (11 تا 24 روزگی) و پایانی (25 تا 42 روزگی) در قالب طرح کاملاً تصادفی مورد ارزیابی قرار گرفتند. تیمارها شامل: 1) شاهد (بدون اعمال محدودیت غذایی)، 2) اعمال 8 ساعت محدودیت غذایی (از سن 8 تا 28 روزگی)، 3) اعمال 16 ساعت محدودیت غذایی (از سن 8 تا 25 روزگی) و 4) تغذیه یک روز در میان (از 8 تا 21 روزگی) بودند. در دوره رشد اعمال محدودیت‌های غذایی نسبت به گروه شاهد موجب کاهش عملکرد شد (0/05>P). مقدار خوراک مصرفی روزانه، افزایش وزن و وزن پایان دوره جوجه‌‌ها کاهش و ضریب تبدیل خوراک افزایش یافت (0/05>P). در حالی که در دوره پایانی، اعمال محدودیت غذایی موجب افزایش وزن بیش تر و بهبود ضریب تبدیل خوراک شد. بهترین نتیجه در این دوره با اعمال 16 ساعت گرسنگی حاصل گردید که این نتیجه در کل دوره آزمایش نیز مشاهده شد. برنامه تغذیه‌‌ای یک روز در میان باعث کاهش مقدار خوراک مصرفی روزانه جوجه‌‌ها شد (0/05>P). اعمال محدودیت غذایی غلظت HDL خون را نسبت به شاهد کاهش و غلظت پروتئین تام را افزایش داد (0/05>P). به طور کلی اعمال 16 ساعت محدودیت غذایی در فاصله زمانی 8 تا 25 روزگی جوجه‌‌های گوشتی سویه راس- 308 موجب بهبود شاخصه‌های عملکردی جوجه‌‌ها در کل دوره پرورش می‌‌گردد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The effects of using different feed restriction periods on growth performance and blood parameters in Ross- 308 broiler chicks

نویسندگان [English]

  • Vali Ouroji
  • Ali Nobakht
Department of Animal Science, Maragheh Branch, Islamic Azad University, Maragheh, Iran
چکیده [English]

Current experiment was conducted to investigate the effects of different feed restriction periods on the performance and blood biochemical parameters of Ross-308 broiler chicks. 192 chicks from 10 to 42 days were used in 4 treatments, 4 replicates and 12 chicks in each replicate in growth (11 to 24 days) and finishing (25 to 42 days) in a completely randomized design. Treatments included: 1) control (without feed restriction), 2) 8 hours feed restriction (from 8 to 28 days of age), 3) 16 hours feed restriction (from 8 to 25 days of age) and 4) feeding skip a day (from 8 to 21 days). Feed restriction had significant effects on broilers' performance and blood biochemical parameters (P<0.05). In the growth period, feed restriction in contrast with the control group, reduced the growth performance of broilers. In this period, daily feed intake, daily growth weight and weight in final period decreased, whereas feed conversion ratio increased. But in the finishing period, feed restriction caused the amount of weight gain to increase and the feed conversion ratio reduces. Feeding skip a day caused the amount of daily feed intake to reduce (P<0.05). In contrast with control group, feed restriction caused the amounts of blood HDL to decline and total protein increased (P<0.05). In conclusion, using 16 hours feed restriction between 8 to 25 days in Ross-308 broilers breeding period, cause the performance index improve.

کلیدواژه‌ها [English]

  • Blood parameters
  • Broilers
  • Feed restriction
  • Performance

مراجع

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فصلنامه محیط زیست جانوری
دوره 14، شماره 2
تیر 1401
صفحه 93-102

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