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Changes of macrominerals and calcitropic hormones in serum of periparturient dairy cows subject to subclinical hypocalcaemia

Published online by Cambridge University Press:  22 February 2018

Chuanjiang Cai ,
Yezi Kong ,
Dianjun Wu  and
Jianguo Wang
Chuanjiang Cai
Affiliation:
College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
Yezi Kong
Affiliation:
College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi, China
Dianjun Wu
Affiliation:
Department of Clinical Science, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, China
Jianguo Wang*
Affiliation:
College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi, China College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi, China
*
*For correspondence; e-mail: [email protected]
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Abstract

The aims of the study reported in the Research Communication were to evaluate changes of macrominerals and major calcitropic hormone concentrations in 51 healthy dairy cows over the peripartum period, and to compare those cows with 51 cows subject to subclinical hypocalcaemia (SCH) on calving day. The results showed that serum calcium (Ca) and potassium (K) concentrations were lowest in the healthy periparturient dairy cows at parturition, while sodium (Na) and parathyroid hormone (PTH) concentrations were highest. Serum magnesium (Mg), chloride (Cl) and phosphorus (P) concentrations were highest 1 wk prepartum, however, the concentration of 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] was highest 1 wk postpartum. The dairy cows with subclinical hypocalcaemia (SCH) had significantly lower serum levels of Ca, K, Na, Mg, Cl, 1,25(OH)2D3 and glucose and had significantly higher levels of serum P, non-esterified fatty acids (NEFA) and β-hydroxybutyrate (BHBA) than their healthy counterparts on calving day. However, the serum calcitonin and PTH concentrations were not significantly different between the two groups. These data demonstrated that the concentrations of macrominerals and major calcium regulating hormones of cows change dramatically over the peripartum period. Furthermore, SCH was associated with a risk of the development of ketosis and fatty liver.

Keywords

Metabolic disorderHomoeostatic1,25(OH)2D3PTHPeripartum
Type
Research Article
Information
Journal of Dairy Research , Volume 85 , Issue 1 , February 2018 , pp. 12 - 15
Copyright
Copyright © Hannah Dairy Research Foundation 2018 

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