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Tytuł:
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Effects of dietary electrolytes, osmolytes, and energetic compounds on body temperature indices in heat-stressed lactating cows.
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Autorzy:
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Al-Qaisi M; Department of Animal Science, Iowa State University, Ames, IA, USA; Department of Animal Production, The University of Jordan, Amman, Jordan.
Horst EA; Department of Animal Science, Iowa State University, Ames, IA, USA.
Kvidera SK; Department of Animal Science, Iowa State University, Ames, IA, USA.
McCarthy CS; Department of Animal Science, Iowa State University, Ames, IA, USA.
Mayorga EJ; Department of Animal Science, Iowa State University, Ames, IA, USA.
Abeyta MA; Department of Animal Science, Iowa State University, Ames, IA, USA.
Goetz B; Department of Animal Science, Iowa State University, Ames, IA, USA.
Upah NC; TechMix, LLC., Stewart, MN, USA.
McKilligan DM; TechMix, LLC., Stewart, MN, USA.
Kolstad BW; TechMix, LLC., Stewart, MN, USA.
Timms LL; Department of Animal Science, Iowa State University, Ames, IA, USA.
Baumgard LH; Department of Animal Science, Iowa State University, Ames, IA, USA. Electronic address: .
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Źródło:
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Research in veterinary science [Res Vet Sci] 2020 Oct; Vol. 132, pp. 42-48. Date of Electronic Publication: 2020 May 19.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: London : British Veterinary Association
Original Publication: Oxford.
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MeSH Terms:
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Body Temperature/*drug effects
Diet/*veterinary
Electrolytes/*metabolism
Heat-Shock Response/*drug effects
Lactation/*drug effects
Animal Feed/analysis ; Animals ; Cattle ; Dietary Supplements/analysis ; Electrolytes/administration & dosage ; Female ; Random Allocation
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Contributed Indexing:
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Keywords: Electrolyte; Heat stress; Hydration; Insulin
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Substance Nomenclature:
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0 (Electrolytes)
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Entry Date(s):
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Date Created: 20200602 Date Completed: 20201229 Latest Revision: 20201229
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Update Code:
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20240104
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DOI:
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10.1016/j.rvsc.2020.05.012
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PMID:
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32480187
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Objectives were to determine the effects of a product containing electrolytes, osmolytes, and energetic compounds (EOEC) on body temperature indices in heat-stressed (HS) Holstein cows. Lactating cows were assigned to 1 of 2 treatments: 1) a control diet (n = 10) or 2) a control diet supplemented with 113 g/d of EOEC (n = 10; Bovine BlueLite® Pellets; TechMix LLC, Stewart, MN). The trial consisted of 2 experimental periods (P). During P1 (4 d), cows were fed their respective treatments and housed in thermoneutral conditions. During P2 (4 d), HS was artificially induced using an electric heat blanket (EHB). Overall, HS markedly increased vaginal temperature (Tv), rectal temperature (Tr), skin temperature (Ts), and respiration rate (RR) (P < .01). There were no dietary treatment differences in Tv, Tr, or RR; however, during P2 EOEC-supplemented cows had increased Ts (0.8 °C; P = .04). Compared to P1, HS decreased DMI and milk yield (45 and 27%, respectively, P < .01) similarly amongst treatments. Relative to P1, circulating insulin decreased (41%; P = .04) in CON cows, whereas it remained unaffected in EOEC-supplemented cows, resulting in a 2-fold increase in EOEC compared with CON-fed cows (P < .01) during P2. Relative to P1, HS increased circulating non-esterified fatty acids (NEFA; 63%; P < .01). During P2, there tended to be a treatment by day interaction on circulating NEFA, as concentrations decreased from d 2 to 4 of P2 in EOEC-fed cows but continued to increase in CON cows. In summary, feeding EOEC altered some key aspects of energetic metabolism and increased Ts.
Competing Interests: Declaration of Competing Interest Nathan Upah, Denny McKilligan and Brad Kolstad are TechMix employees.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
