نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش‌آموخته کارشناسی ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران.
2 دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران.
چکیده
به‌منظور بررسی امکان استفاده از پودر جوجه خروسهای نژاد لگهورن، در تغذیه مرغهای تخم‌گذار آزمایشی با استفاده از 200 قطعه مرغ تخم‌گذار سویه بونز در سن 50 هفتگی، طی سه دوره 28 روزه در قالب طرح کاملاً تصادفی با پنج تیمار، پنج تکرار و هشت مرغ در هر تکرار انجام شد. تیمارهای آزمایشی عبارت بودند از جیره‌های حاوی سطوح صفر (شاهد)، چهار، هشت، 12 و 16 درصد پودر جوجه. نتایج آزمایش نشان داد در کل دوره پرورش، تغذیه مرغها با سطح 4 درصد پودر جوجه سبب افزایش وزن تخممرغ در مقایسه با سطوح هشت و 16 درصد شد (0/05>P). با افزایش سطح پودر جوجه در جیره از 12 به 16 درصد، مصرف خوراک در بازههای زمانی 50 تا 53 هفته و کل دوره به‌طور معنیداری کاهش یافت (0/05>P). تیمارهای آزمایشی اثری بر میانگین ضریب تبدیل خوراک، تولید تخممرغ، توده تخم مرغ و میزان ضخامت پوسته تخممرغ نداشتند. بالاترین شاخص رنگ زرده با تغذیه 12 و 16 درصد پودر جوجه در مقایسه با تیمار شاهد و چهار درصد پودر جوجه مشاهده شد (0/05>P). مصرف 16 درصد پودر جوجه سبب افزایش مقاومت پوسته در مقایسه با گروه شاهد شد (0/05>P). با افزایش جایگزینی پودر جوجه در جیره پایه تا سطح 12 درصد، هزینه خوراک برای تولید هر کیلوگرم تخممرغ تولیدی کاهش یافت (0/05>P). براساس نتایج حاصل، می توان از پودر جوجه تا سطح 12 درصد در تغذیه مرغ های تخم‌گذار استفاده کرد.
کلیدواژه‌ها
عنوان مقاله [English]
Applicability of using chicken powder in laying hens diets
نویسندگان [English]
- Zahra Bakhtiari 1
- Mohamad Salarmoini 2
- Mohsen Afsharmanesh 2
1 Department of Animal Science, College of Agriculture, Shahid Bahonar University, Kerman, Iran
2 Department of Animal Science, College of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
چکیده [English]
In order to investigate the applicability of using male Leghorn chicken powder for laying hens, the experiment was performed with two hundred 50 weeks old Bovans laying hens during three periods of 28 days in a completely randomized design, with 5 treatments, 5 replications, and 8 laying hen per each replication. The dietary treatments were 0, 4, 8, 12, and 16 percent chicken powder. The results showed that during the whole of the rearing period, egg weight was increased when the hens were fed with 4 percent chicken powder, in comparison to 8 and 16 percent levels (P < 0.05). With increasing the level of chicken powder in the diet from 12 to 16 percent, feed intake significantly decreased during 50-53 weeks period and whole rearing period (P < 0.05). Dietary treatments had no significant effect on feed conversion ratio, hen-day egg production, egg mass and egg shell thickness. The highest yolk color index was observed in hens fed with 12 and 16 percent chicken powder in comparison to the control and 4 percent treatments (P < 0.05). Consumption of 16 percent chicken powder increased shell resistance in comparison to the control (P < 0.05). Using chicken powder, up to 12 percent level, significantly decreased feed cost to produce one Kg egg. In conclusion, chicken powder up to 12 percent level does not seem to have an adverse effect on laying hens performance, but further researches are needed to evaluate the effects of chicken powder at 16 percent level.
کلیدواژه‌ها [English]
- Chicken powder
- Egg production
- Egg quality
- Laying hen
- Shell thickness
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