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Bone Mineral Changes in Dairy Cows

Benmineralförändringar hos mjölkkor: Effekten av låg och hög calciumutfodring under höglaktationen

The Effect of Low and High Calcium Feeding During the High Yielding Period*

Acta Veterinaria Scandinavica volume 19, pages 39–48 (1978)Cite this article

Abstract

Bone mineral content in two coccygeal vertebrae of 14 cows of Swedish Red and White Breed were investigated using the dichromatic photon absorptiometry. The investigation started at parturition and continued for 120 days. Each animal received a controlled amount of hay, ensilage and concentrate, and the milk yield was measured and registered. Seven cows (group L) received Ca and P close to the ARC standard. The other seven cows (group H) received a 30 % higher amount of Ca and P (15–20 % above Swedish standard) than the ones in group L. The bone mineral content in group L decreased by 10 % up to 90 days postpartum, and thereafter increased. In group H, the mean bone mineral content increased.

Sammanfattning

Benmineralinnehållet i två svanskotor hos 14 kor av SRB-ras mättes med dikromatisk foton absorptiometri. Undersökningen började vid kalvningen och fortsatte under 120 dagar. Varje djur erhöll kontrollerade mängder hö, ensilage och kraftfoder och avkastningen mättes och registrerades. Sju kor (grupp L) erhöll Ga och P ungefär enligt ARG-standarden. De andra 7 korna (grupp H) erhöll 30 % mer Ga och P än korna i grupp L. Benmineralinnehållet i grupp L minskade under de första 90 dagarna, därefter skedde en ökning. I grupp H ökade benmineralinnehållet under de 120 dagar som undersökningen omfattade. Undersökningen visar att Ga-dränaget under laktationen kan motverkas genom ett högt tillskott av mineralfoder under höglaktationen.

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Authors and Affiliations

  1. Department of Animal Hygiene and the Department of Clinical Radiology, Animal Science Centre, College of Veterinary Medicine, Swedish University of Agricultural Sciences, S-750 07, Uppsala 7, Sweden

    Roland Zetterholm

  2. Research Station of the Veterinary Institute, Skara, Sweden

    Roland Zetterholm

  3. Laboratory for Comparative Orthopaedics, Hospital for Special Surgery, USA

    Roland Zetterholm

  4. New York Hospital — Cornell University Medical College, New York, USA

    Roland Zetterholm

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  1. Roland Zetterholm
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Zetterholm, R. Bone Mineral Changes in Dairy Cows. Acta Vet Scand 19, 39–48 (1978). https://doi.org/10.1186/BF03547640

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Keywords

Acta Veterinaria Scandinavica

ISSN: 1751-0147