اثر افزودن منابع پروتئین عبوری در جیره گاوهای پابه‌ماه بر وضعیت متابولیکی و بروز ناهنجاری‌های ‏سلامتی گاوهای هلشتاین طی فصل گرم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

2 استاد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

3 استادیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران

4 استادیار، گروه علوم دامی، مرکز تحقیقات کشاورزی و منابع طبیعی شهرکرد، شهرکرد، ایران

چکیده

هدف از پژوهش حاضر بررسی اثر افزودن منابع پروتئین عبوری در جیره گاوهای پابه­ماه هلشتاین بر متابولیت­های خونی و بروز ناهنجاری­های متابولیکی در فصل گرم بود. 88 راس گاو هلشتاین چندبار زایش کرده، 30 روز پیش از تاریخ زایش مورد انتظار وارد طرح شدند و به یکی از 2 تیمار آزمایشی: پروتئین خام پایین (3/14 درصد پروتئین خام؛ LCP) و پروتئین خام بالا (1/17 درصد پروتئین خام؛ HCP) با استفاده از کنجاله گلوتن ذرت و پودر ماهی اختصاص یافتند. به منظور بررسی متابولیت­های خونی، از 30 روز پیش از زایش تا روز زایش هر هفته و همچنین در روزهای صفر، 5، 14 و 21 پس از زایش، خونگیری از تمام گاوها انجام شد. غلظت آلبومین، نیتروژن اوره­ای خون (BUN) و منیزیم در گروه HCP در دوره پیش از زایش بالاتر بود. در دوره پس از زایش در تیمار HCP، مقدار آلبومین و کراتینین بیشتر و مقدار FFA، BHB و گلوکز کمتر بود. بروز کتوزیس تحت بالینی، متریت و اندومتریت در تیمار HCP نسبت به تیمارLCP کمتر بود. خوراندن جیره حاوی پروتئین عبوری بالا در دوره پابه­ماه در فصل گرم باعث افزایش آلبومین در دوره پیش و پس از زایش، افزایش غلظت کراتینین در دوره پس از زایش و کاهش بروز کتوزیس، متریت و اندومتریت شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of supplementing close-up diets with rumen undegradable protein on ‎metabolitc status and the incidence of health disorders of Holstein cows during the ‎hot season

نویسندگان [English]

  • Fateme Ahmadi 1
  • Hamid Amanlou 2
  • Tahere Amirabadi Farahani 3
  • Najme Eslamian Farsuni 4
1 PhD. Candidate, Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Professor, Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3 Assistant Professor, Department of Animal Sciences, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran‎
4 Assistant Professor, Department of Animal Sciences, Agriculture and Natural Resources Research Center, Shahrekord, Iran‎
چکیده [English]

The objective of this study was to evaluate the effect of supplementing close-up diets with rumen undegradable protein on serum metabolites and the incidence of health disorders of Holstein dairy cows, during the hot season. Eighty-eight multiparous Holstein dairy cows were randomly assigned to 1 of 2 treatment groups: low crude protein (14.3% CP; 14CP) and high crude protein (17.1% CP; 17CP) diets. Blood samples were collected weekly from d -30 up to calving and then at 0, 5, 14, and 21 days after calving, for serum metabolites determination.  Cows fed the 17CP diet had higher serum concentrations of albumin, blood urea nitogen, and Mg than 14CP cows during the close-up period. In postpartum, the 17CP cows had higher serum albumin and creatinine and lower free fatty acid, BHB, and glucose concentrations than the 14CP cows. The risk to developing subclinical ketosis (SCK), metritis and endometritis were higher for the 14CP cows than the 17CP cows. Overall, feeding high rumen undegradable protein diet to close-up cows during the hot season increased serum creatinine concentrations and lowered the incidence of SCK and metritis and endometritis postpartum.

کلیدواژه‌ها [English]

  • Holstein cows
  • hot season
  • metabolic disorders
  • rumen undegradable protein
  • transition cow
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