Bovis ISSN 2398-2993

Rumen pH and the importance of saliva

Contributor(s): Laura Tennant , Sophie Mahendran

University of Nottingham logo

Saliva

  • Saliva is produced and secreted from exocrine salivary glands in the mouth.
  • The secretory elements of salivary glands are groups of cells called acini.
  • The fluid goes through small collecting ducts within salivary glands which then filter into larger ducts, then forming a single large duct that empties into the oral cavity as saliva.
  • Acini cells secrete a fluid that contains water, electrolytes and mucous.
  • Saliva is added during the mastication of feed, 110-180 litres of saliva are needed per day for chewing, regurgitation and rumination. This amount of saliva is variable, depending on the amount and components of feed given.
  • Saliva acts as a buffer for rumination and cud formation.
  • The salivary buffer also acts as a rumen pH stabilizer.

Saliva and Rumination

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Saliva the Buffer-Ruminal pH

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

When saliva and rumen pH fail

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Contreras-Govea F E, Cabrera V E, Armentano L E, Shaver R D, Crump P M, Beede DK & VandeHaar M J (2015) Constraints for nutritional grouping in Wisconsin and Michigan dairy farms. J Dairy Sci 98, 1336-1344 PubMed.
  • Golder H M, Celi P, Rabiee A R & Lean I J (2014) Effects of feed additives on rumen and blood profiles during a starch and fructose challenge. J Dairy Sci 97, 985-1004 PubMed.
  • Schirmann K, Chapinal N, Weary D M, Heuwieser W & von Keyserlingk M AG (2012) Rumination and its relationship to feeding and lying behaviour. J Dairy Sci 95, 3212-3217 PubMed.
  • Maekawa M I, Beauchemin K A & Christensen D A (2002) Effect of concentrate level and feeding management on chewing activities, saliva production, and ruminal pH of lactating dairy cows. J Dairy Sci 85 (5), 1165-75 PubMed.

Other sources of information

  • Chamberlain A T & Wilkinson J M (1996) Feeding the Dairy Cow. Chalcombe publications.


ADDED