An Investigation into the Coliform Growth of Digested Manure Solids on a Large Commercial Michigan Dairy

Authors

  • J. S. P. Tulloch College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824
  • N. J. O'Boyle College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824
  • P. M. Sears College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824

DOI:

https://doi.org/10.21423/aabppro20094339

Keywords:

anaerobic digesters, freestall bedding, udder health, milk quality, environmental mastitis, coliform bacteria

Abstract

Anaerobic digesters are a potential solution for increasing sustainability while reducing the environmental impact of dairy farms. Many farms utilize the digester's solid waste product as freestall bedding. It provides good cow comfort and is readily available at a low cost to the producer. However, concerns have been raised about the relationship of this bedding to udder health and milk quality. Currently, little is known about the ideal management of digested manure solids, its use as bedding, and its influence on environmental mastitis. We set out to qualify and quantify the levels of coliform bacteria in the bedding, as well as aspects which would influence management in the freestall by measuring changes over time, surface and deep differences, composting and influence of the cow (i.e., inoculation of the bedding).

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Published

2009-09-10

Issue

Section

Research Summaries 4

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