Cited by 33Ruminant Nutrition and Digestive PhysiologyAnimal Nutrition and PhysiologyMilk Quality and Mastitis in Dairy Cows

Short Communication: Effects of Subacute Ruminal Acidosis on Free-Choice Intake of Sodium Bicarbonate in Lactating Dairy Cows

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Keunen, J.E., Plaizier, J.C., Kyriazakis, I., Duffield, T.F., Widowski, T.M., Lindinger, M.I., McBride, B.W.·2003·Journal of Dairy Science

Abstract

The effect of inducing subacute ruminal acidosis (SARA) on the free-choice intake of sodium bicarbonate (SB) was investigated in four midlactation Holstein cows in a switchover experiment with four 1-wk periods. The SARA was induced by replacing 25% of the ad libitum intake of total mixed ration (TMR) with pellets containing 50% ground wheat and 50% ground barley and restricting access to TMR from 0700 to 1700 h. Control consisted of feeding TMR ad libitum. Powdered SB was provided for ad libitum consumption. Rumen pH was measured continuously using indwelling pH probes. Induction of SARA reduced (P < 0.05) the average daily rumen pH from 6.08 to 5.87, increased (P < 0.05) the average duration of rumen pH below 6 from 547 min x d(-1) to 916 min x d(-1), and increased (P < 0.05) the average duration of rumen pH below 5.6 from 132 min x d(-1) to 397 min x d(-1) (P < 0.05) but did not significantly affect SB intake. Average intake of SB was 26.8 g x d(-1) during SARA and 34.5 g x d(-1) during control. These low SB intakes must not have substantially affected rumen pH. Sodium bicarbonate intake differed significantly (P < 0.05) between cows. These data indicate that cows did not select SB in order to attenuate SARA.

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Authors
Keunen, J. E., Plaizier, J. C., Kyriazakis, I., Duffield, T. F., Widowski, T. M., Lindinger, M. I., & McBride, B. W.
Affiliations
  • University of Guelph (CA)
  • University of Manitoba (CA)
  • Scottish Agricultural College (GB)
Corresponding author
McBride, B.W.
Venue
Journal of Dairy Science
Published
2003-03
Volume
86
Issue
3
Pages
954-957
ISSN
0022-0302 (ISSN-L)
OpenAlex
W1972085638
Cited by
31
References
24
Citations by year
2022: 2 · 2018: 1 · 2017: 1 · 2014: 4
FWCI
4.07
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Milk Quality and Mastitis in Dairy Cows
Keywords
subacute ruminal acidosis, sodium bicarbonate, lactating dairy cows, rumen pH, feed restriction, Holstein cows, acid-base balance
MeSH terms
Acidosis, Animals, Cattle, Cattle Diseases, Female, Hydrogen-Ion Concentration, Lactation, Rumen, Self Administration, Stomach Diseases, Sodium Bicarbonate

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