بررسی اثر محدودیت کمی خوراک بر عملکرد، خصوصیات تولید‌مثلی و شاخص تنش مرغان بومی ایستگاه مرغ بومی خراسان

نوع مقاله : علمی پژوهشی- تغذیه طیور

نویسندگان

1 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خراسان رضوی، سازمان آموزش تحقیقات و ترویج کشاورزی مشهد، ایران

2 مرکز تحقیقات خراسان رضوی

3 سازمان جهاد کشاورزی خراسان رضوی

چکیده

به‌منظور بررسی اثر سطوح مختلف محدودیت کمی خوراک بر عملکرد مرغان بومی استان خراسان، آزمایشی با استفاده از 350‌ قطعه مرغ بومی در قالب طرح‌ کاملاً تصادفی با هفت تیمار آزمایشی، پنج تکرار و 10‌مرغ در هر تکرار از سن 36 الی 52‌ هفتگی در ایستگاه مرغ بومی خراسان اجرا شد. تیمارهای آزمایشی بر پایه ذرت، سویا، گندم و جیره‌ی یکسان بدین‌صورت بود که در گروه شاهد مصرف خوراک به‌صورت آزاد بود و در سایر تیمارها مصرف روزانه در حد 125، 120، 115، 110، 105 و 100‌‌ گرم محدود گردید. نتایج نشان‌داد که محدودیت خوراک تا سطح 110‌ ‌گرم باعث کاهش معنی‌دار در درصد تولید تخم‌مرغ نشد، اما گروه‌های مصرف‌کننده کمتر از 110‌‌ گرم خوراک در روز، کاهش معنی‌دار درصد تولید را نشان‌دادند. سطوح 100 و 110‌‌ گرم محدودیت خوراک جیره غذایی در مقایسه با مصرف خوراک آزاد، اثر معنی‌‌داری بر وزن تخم‌مرغ نشان نداد. گروه‌های با محدودیت مصرف 100 و 105‌‌گرم در روز، کاهش معنی‌دار وزن توده تخم‌مرغ را نسبت به گروه شاهد و سایر گروه‌ها نشان‌دادند. بهترین ضریب تبدیل غذایی در سطح 110‌‌ گرم محدودیت خوراک مشاهده شد. محدودیت خوراک در سطح 105 و 100‌‌ گرم در روز باعث کاهش درصد چربی حفره بطنی و وزن سنگدان شد؛ اما بر وزن لوله تخم‌بَر و مجموعه تخمدانی اثری نداشت. محدویت خوراک در سطح 100‌‌ گرم در روز باعث افزایش نسبت هتروفیل به لنفوسیت گردید، اما سایر سطوح محدودیت خوراک اثری بر این نسبت نداشت. به‌طور کلی نتایج این بررسی نشان‌داد که میزان 110‌‌ گرم محدودیت خوراک در روز باعث کاهش تولید تخم‌مرغ و تغییر در نسبت هتروفیل به لنفوسیت در پرنده نشد و این میزان محدودیت در بهبود ضریب تبدیل غذایی در مرغان بومی مؤثر است.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of quantitative feed restriction on performance, stress index and reproduction properties in native hens of Khorasan station

نویسندگان [English]

  • Alireza hessabi nameghi 1
  • Mohammad reza Birjandi 2
  • Asghar Mohammadpoor 3
1 Department of Animal Science, Agricultural and Natural Resources Research Center of Khorasan, Mashhad, Iran
2 Dept. of Animal Science, Khorasan Agricultural and Natural Resources Research Center Mashhad ,Iran
3 Agricultural Organization of Khorasan vXhgazavi
چکیده [English]

Introduction Under commercial conditions broiler are feed restricted during rearing to limit growth rate. This quantitative restriction of feed intake aims at avoiding rapid growth and high body weights, which are associated with pathological conditions, such as ascites, lameness, and mortality. Feed restriction (FR) in breeder layer hens was rarely and FR used for poor reproductive results and low fertility. Native poultry population is developing and the role of these birds in the production of animal protein is increasing. Native hens of Khorasan breeding station and most stations in country feed adlibitum. Add feed intake on the one hand leads to economic loss and also leads to increase weight in laying hens that may interfere with the process of egg production and hatchability. This experiment was conducted to evaluate of different levels of quantitative feed restriction (FR) on performance, stress index and reproduction properties of native hens of Khorasan station.
Materials and Methods to investigate the effects of feed restriction, an experiment with 350 hens in the form of completely randomized design with seven treatments, five replicates and 10 hens in each replicate of age 36 to 52 Weekly implemented. Treatments based on corn, soybean and wheat with different levels of FR, including 125,120,115,110,105 and 100 g/ days for layer hens and control groups feed intake was adlibitum. During the trial period, all eggs produced by hens in each pen were measured on a daily basis. Amounts of feed added to the feed troughs were recorded daily. After each week, the weights of feed in the troughs of adlibitum fed birds were recorded. From these data, daily mean intakes per bird were calculated for this pen. During the experimental period the birds were free of water and 16 hours of light and 8 hours of darkness were used. At the end of the experiment (52 weeks) two birds of each experimental pens were slaughtered and immediately different organs weight of each birds were measured. On the same day, three hens per pen were randomly collected blood from the vein under the wing. Blood containing EDTA anticoagulant were then transferred to the laboratory and a development staining by method of May Grunwald- Giesma were prepared.
Results and Discussion the results showed that FR as soon as 110 g/days had no significant effect on egg production (EP), but in another groups of FR (105 and 100 g/days) decreased EP. The results showed that native hens feed intake less than 110 g/ day, decreased EP. The results of this study indicated when we are to the end of the weeks of experimental periods, the EP more decline caused by FR. Levels of 100 and 110g/days FR and control group (adlibitum feed intake) has no significant effect on egg weight (p>0.05). The best feed conversion ratio (FCR) was observed in 110 g/days of FR (p

کلیدواژه‌ها [English]

  • Feed restriction
  • Immune response
  • Native hens of Khorasan
  • Performance
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