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Yield of colostrum and immunoglobulin in cattle at the first milking after parturition

Published online by Cambridge University Press:  02 September 2010

V. Kruse
Affiliation:
Department of Cattle Experiments, National Institute of Animal Science, Rolighedsvej 25, 1958 Copenhagen V, Denmark
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Summary

The experimental animals consisted of 71 heifers or cows of the Black and White Danish breed (SDM), 61 heifers or cows of the Red Danish breed (RDM), and 8 heifers or cows of the Jersey breed. Highly significant differences between breeds were found in yield of colostrum at first milking after calving and in the concentration of immunoglobulin (Ig) in colostrum. The RDM animals had the highest colostrum yield but the lowest Ig %. The total yield of Ig was not significantly different between RDM and SDM. The individual variation in colostrum yield, Ig %, and Ig yield was very marked.

Heifers had a lower colostrum yield and Ig yield than cows in second and later lactations. For SDM the Ig % was not dependent on the lactation number. In contrast the older RDM cows had a significantly higher Ig % in colostrum than the younger cows. No effect of season of the year was found on colostrum yield, Ig %, and Ig yield. An increase of the interval between calving and the first milking caused a very significant drop in colostrum Ig %. Loss of colostrum from the udder before milking increased the probability of getting colostrum with low Ig %. The repeatability in Ig % at successive calvings was found to be high.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1970

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References

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