Mineral concentrations in cattle in different sample media with emphasis on fecal analysis

Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
Andrea HeroldR Staufenbiel

Abstract

The objective of this study was to evaluate whether the concentrations of calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K), sodium (Na) and sulfur (S) in the feces reflect the content in feeds and whether analysis of the feces provides information on the nutritional supply of the body with these elements. For this purpose, element concentrations in feed and in serum, plasma, whole blood, urine and hair were compared. During 73 farm visits on 63 dairy farms, samples were collected from up to 10 cows in both the close-up (3-0 weeks a. p.) and high-yielding (6th-20th week p. p.) groups. Concentrations of Ca, P, Mg, K, Na and S were determined in pooled samples of each lactation group and in a sample of the total mixed ration (TMR) by ICP-OES. Additionally, feces from beef cows during the grazing and housing periods were analyzed. Mineral concentrations in feed samples were sufficiently high to meet the nutritional requirements. Mineral concentrations were higher in feces than in feed, with the exception of Na and K. There were significant correlations between feed and fecal concentrations for all elements, whereby the correlations between the TMR and urine concentrations were higher for K, Na and S. Seasonal variations ...Continue Reading

Citations

Jun 23, 2021·Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere·Lydia StaufenbielHeidrun Gehlen

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