اثر گیاهان دارویی رازیانه، سیاه‌دانه و زیره بر تولید شیر و سطح هورمون رشد و پرولاکتین در گاوهای شیرده هلشتاین

نویسندگان

1 ‌دانشگاه آزاد اسلامی‌ واحد سراب

2 دانشگاه محقق اردبیلی اردبیل

چکیده

زمینه مطالعاتی: این مطالعه به منظور بررسی اثر مخلوط گیاهان شیر‌افزا بر تولید شیر و سطح پرولاکتین و هورمون رشد در گاوهای شیرده هلشتاین انجام شد. هدف: این آزمایش در قالب طرح کاملا تصادفی با 12 راس گاو شیرده هلشتاین با میانگین وزن 15±620 کیلوگرم، میانگین روز شیردهی 10±30 روز و میانگین تولید شیر10±33 کیلوگرم در روز انجام شد. روش کار: در این مطالعه گاوها به دو گروه تقسیم شدند، گروه اول (6 راس) به عنوان گروه شاهد که با جیره ی پایه تنظیم شده براساس احتیاجات غذایی NRC(2001) برای تامین احتیاجات گاوهای شیری تغذیه شد و گروه دوم (6 راس) که همراه با جیره پایه پودر گیاهان دارویی شیرافزا (03/0 درصد وزن بدن) (شامل مخلوط دانه رازیانه، سیاه دانه و زیره سیاه) به صورت مخلوط با کنسانتره استفاده شد. دوره اصلی به مدت 8 هفته پس از یک هفته دوره عادت­دهی اجرا شد. در این مدت شیر تولیدی دام­ها هر دو روز یکبار اندازه گیری و ثبت شده و ترکیبات آن تعیین شد. در انتهای آزمایش از تمامی‌دام­ها از طریق ورید وداجی خونگیری شده و به منظور تعیین میزان هورمون رشد و پرولاکتین به آزمایشگاه انتقال یافت. نتایج: نتایج نشان داد که تولید شیر دام­های تغذیه شده با تیمار شیرافزا افزایش معنی داری (0001/0>(P داشته است (3/36 کیلوگرم در مقابل8/33 کیلوگرم). درصد ترکیبات شیر تغییر معنی­داری نشان نداد، هر چند مقادیر تولید روزانه آنها در پاسخ به افزایش شیر تولیدی به طور معنی­دار (05/0p <) شد. سطوح هورمون رشدو پرولاکتین نیز، تمایل به افزایش نشان داد که از لحاظ آماری معنی­دار نبود. نتیجه گیری نهایی: می‌توان نتیجه گرفت که استفاده از این ترکیب گیاهان شیرافزا در بهبود تولید شیر می‌تواند موثر باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of feeding fennel, black seed and black caraway plant on milk yield, growth hormone and prolactin in lactating Holstein cows

نویسندگان [English]

  • V Attari 1
  • Sh Basiri 1
  • V Taheri 2
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