اثر سطح باروری و رقیق‌کننده اسپرم بر خصوصیات تولید مثلی خروس‎های بومی و آرین ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم دامی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران-ایران

2 استادیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران-ایران

3 دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران-ایران

4 دانشجوی کارشناسی ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران - ایران

چکیده

کاهش باروری خروس‎ یکی از اولین عوامل محدودکننده دستیابی به بیشترین میزان جوجه‌درآوری است. هدف از تحقیق حاضر، بررسی سطح باروری خروس‎های بومی ارومیه و لاین آرین با استفاده از رقیق کننده منی (بلتسویل و شیر) بود. برای اجرای این تحقیق، تحرک منی 133 قطعه خروس با استفاده از نرم‏افزار CASA بررسی شد و خرو‌س‌ها بر اساس میانگین حرکت اسپرم آنها نسبت به میانگین جمعیت، به گروه‌های با باروری زیاد و کم دسته بندی شدند. اسپرم خروس‎های هر سویه، هر هفته به شش مرغ تلقیح و نطفه‌داری و جوجه‌درآوری تخم‎ها بررسی شدند. تفاوت معنی‎داری در حجم منی هر سویه وجود داشت (05/0>P). تفاوت معنی‎داری در غلظت اسپرم خروس‎های دو سویه و سطوح مختلف باروری مشاهده نشد. خروس‎های بومی با سطح باروری زیاد بیشترین درصد اسپرم‎های زنده را داشتند (05/0>P). نطفه‎داری و جوجه‎درآوری خروس‎های آرین در مقایسه با بومی بالاتر بود (05/0>P). همچنین نطفه‎داری و جوجه‎درآوری با استفاده از رقیق کنندة بلتسویل بالاتر از شیر بود (05/0>P). با توجه به نتایج حاصل، اگرچه انتخاب در لاین آرین بسیاری از صفات تولیدی را افزایش داده ولی تأثیر منفی بر باروری نداشته است. از طرفی تلقیح مرغ‎ها با استفاده از اسپرم‎های رقیق شده با بلتسویل بازدة مناسب‌تری در درصد باروری پرندگان نشان می‎دهد که می‎تواند در مزارع پرورش طیور بکار رود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of fertility level and extender on the reproductive characteristics in the Iranian indigenous and Arian roosters

نویسندگان [English]

  • Afrooz Kamali Sangani 1
  • Ali Akbar Masoudi 2
  • Rasoul Vaez-Torshizi 3
  • Morteza Sharifi nia 4
  • Alireza Eyvazi 4
  • Majid Farahi 4
  • Behzad Rajabi Marand 4
1 Ph.D. Student, Department of Animal Science, Faculty of Agricultural, Tarbiat Modares University, Tehran - Iran
2 Assistant Professor, Department of Animal Science, Faculty of Agricultural, Tarbiat Modares University, Tehran – Iran
3 Associate Professor, Department of Animal Science, Faculty of Agricultural, Tarbiat Modares University, Tehran - Iran
4 M.Sc. Student, Department of Animal Science, Faculty of Agricultural, Tarbiat Modares University, Tehran - Iran
چکیده [English]

This study was conducted to rank the broiler farms based on buildings, installations and equipment and its effect on production factors. To determine the contribution of each factor in ranking of farms, a multi-criteriadecision analysis (SAW) was used. Data of 108 broilers were recorded in specific forms and the amount of investment per broiler was calculated for individual factors. To calculate the adjusted weights of parameters, 20 experts were consulted as was specified in forms. The results showed that ventilation (fans and air inlets), roof and wall insulation in a poultry houses have represented about 55 percent of technological factors. The breeding units holding rank 1 and 2 enjoyed high degree of mechanization. As the level of mechanization was improved, the density of chickens per unit area was also increased; These units used more tunnel ventilation and large fans, and their ceiling were insulated using fiberglass, polystyrene, corrugated plastic and thickness of walls were also 35 cm. Mostly external heaters have been installed. Feeding and drinker systems have exerted no important effect on production. Slaughter weight and survival percent were not affected by the degree of mechanization but feed intake and feed conversion ratio decreased and production index increased (p<0.01) in the breeding units holding rank 1 and 2. In general in poultry house, ventilation system and ceiling and wall insulation improved energy efficiency and increased the efficiency of the system.

کلیدواژه‌ها [English]

  • Fowl
  • Semen
  • CASA
  • fertility
  • Hatchibility
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