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Research-article| Volume 72, ISSUE 10, P2525-2531, October 1989

Parturient Hypocalcemia in Jersey Cows Fed Alfalfa Haylage-Based Diets with Different Cation to Anion Ratios1

  • Author Footnotes
    2 Present address: Animal Sciences Department, University of Maryland, College Park 20742.
    P.J. Gaynor
    Footnotes
    2 Present address: Animal Sciences Department, University of Maryland, College Park 20742.
    Affiliations
    Dairy Experiment Station, Lewisburg, TN 37091
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  • F.J. Mueller
    Affiliations
    Department of Animal Science, The University of Tennessee, Knoxville 37901-1071
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  • Author Footnotes
    3 To whom reprint requests should be sent.
    J.K. Miller
    Footnotes
    3 To whom reprint requests should be sent.
    Affiliations
    Department of Animal Science, The University of Tennessee, Knoxville 37901-1071
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  • N. Ramsey
    Affiliations
    Department of Animal Science, The University of Tennessee, Knoxville 37901-1071
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  • J.P. Goff
    Affiliations
    National Animal Disease Center, Ames, IA 50010
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  • R.L. Horst
    Affiliations
    National Animal Disease Center, Ames, IA 50010
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  • Author Footnotes
    1 Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by the University of Tennessee or the ARS-USDA, and does not imply its approval to the exclusion of other products that may also be suitable.
    2 Present address: Animal Sciences Department, University of Maryland, College Park 20742.
    3 To whom reprint requests should be sent.
Open ArchiveDOI:https://doi.org/10.3168/jds.S0022-0302(89)79392-9
Parturient Hypocalcemia in Jersey Cows Fed Alfalfa Haylage-Based Diets with Different Cation to Anion Ratios1
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      Abstract

      Jersey cows were fed three alfalfa hay lage-based diets with different cation-anion balances beginning 6 wk preceding third or later calving and ending 24 to 36 h postpartum. Sodium and Cl as percentages of dietary DM were .08 and 1.66 in diet 1 (anionic, 5 cows), .44 and .91 in diet 2 (intermediate, 6 cows), and 1.60 and .34 in diet 3 (cationic, 6 cows). Cation anion balances were 22, 60, and 126 meq/100 g DM; Ca:P ratios averaged 4:1. Cows fed diet 1 in comparison with cows fed diets 2 or 3 over 6 wk had similar concentrations of Ca, P, and Na but higher concentrations of Mg and K in plasma and higher urinary excretions of Ca and Mg. Concentrations of 1,25-dihydroxyvitamin D 3 d before parturition were higher in cows fed diet 1 than in cows fed diets 2 or 3. Within 36 h after calving, mean concentrations of Ca in plasma (mg/dl, range) of cows fed diets 1 to 3, respectively, were 7 (8.7 to 6.2), 6.5 (7.8 to 3.9), and 6.3 (7.8 to 3.8). Number of cases of clinical milk fever by diet were 0 of 5, 2 of 6, and 1 of 6 cows. Alteration of dietary cation-anion balance by addition of Cl may effectively reduce incidence and severity of parturient hypocalcemia.

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      Article info

      Publication history

      Accepted: April 26, 1989
      Received: February 21, 1989

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      DOI: https://doi.org/10.3168/jds.S0022-0302(89)79392-9

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      © 1989 American Dairy Science Association. Published by Elsevier Inc.

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