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Tytuł:
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Association of subclinical hypocalcemia dynamics with dry matter intake, milk yield, and blood minerals during the periparturient period.
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Autorzy:
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Seely CR; Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
Leno BM; Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853.
Kerwin AL; Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853.
Overton TR; Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853.
McArt JAA; Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853. Electronic address: .
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Źródło:
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Journal of dairy science [J Dairy Sci] 2021 Apr; Vol. 104 (4), pp. 4692-4702. Date of Electronic Publication: 2021 Feb 13.
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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: Champaign, IL : American Dairy Science Association
Original Publication: Lancaster, Pa. [etc.]
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MeSH Terms:
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Cattle Diseases*
Hypocalcemia*/veterinary
Animals ; Cattle ; Diet/veterinary ; Female ; Lactation ; Milk ; Minerals ; Postpartum Period ; Pregnancy ; Retrospective Studies
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Contributed Indexing:
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Keywords: dry matter intake; subclinical hypocalcemia; transition cow
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Substance Nomenclature:
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0 (Minerals)
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Entry Date(s):
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Date Created: 20210216 Date Completed: 20210414 Latest Revision: 20210414
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Update Code:
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20240104
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DOI:
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10.3168/jds.2020-19344
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PMID:
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33589249
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Subclinical hypocalcemia (SCH) affects many high-producing dairy cows in the postpartum period. Recent work has shown that cows experiencing prolonged or delayed SCH are at increased risk for disease and produce less milk than cows experiencing a transient reduction in or normal concentrations of plasma Ca following parturition. Our objective was to determine the association between different postpartum SCH dynamics with pre- and postpartum dry matter intake (DMI), milk yield, and blood mineral concentrations. Data were retrospectively collected from multiparous Holstein cows (n = 78), and cows were classified into 1 of 4 SCH groups based on mean blood total Ca (tCa) concentrations at 1 and 4 d in milk (DIM): normocalcemic (NC; [tCa] >1.95 mmol/L at 1 DIM and >2.2 mmol/L at 4 DIM, n = 28); transient SCH (tSCH; [tCa] ≤1.95 mmol/L at 1 DIM and >2.2 mmol/L at 4 DIM, n = 27); delayed SCH (dSCH; [tCa] >1.95 mmol/L at 1 DIM and ≤2.2 mmol/L at 4 DIM, n = 6); and persistent SCH (pSCH; [tCa] ≤1.95 mmol at 1 DIM and ≤2.2 mmol/L at 4 DIM, n = 17). Linear mixed models were created to analyze the change in pre- and postpartum DMI, milk yield, and blood mineral concentrations over time as well as differences between SCH groups. Prepartum intake was similar between groups, but the NC and tSCH cows consumed more feed than the pSCH or dSCH cows during the first 3 wk of lactation. The tSCH cows produced more milk than the other 3 groups during the first 6 wk of lactation. Postpartum blood tCa and Mg were different between SCH groups and were highest in the NC cows and lowest in the pSCH cows. Our results suggest that the high level of DMI consumed by the NC and tSCH cows in the postpartum period supported an appropriate homeostatic response to the increased Ca demands of lactation, allowing for higher milk yield compared with their counterparts experiencing delayed or prolonged episodes of SCH.
(Copyright © 2021 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.)
