| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Department of Animal Sciences, University of Illinois, Urbana 61801
Corresponding author: M. R. Murphy; e-mail: mrmurphy{at}uiuc.edu.
A meta-analysis was conducted to examine potential empirical relationships between dietary cation-anion difference (DCAD) (Na + K – Cl) and the response of lactating dairy cows. The database was developed from 12 studies published between 1984 and 1997 that included a total of 17 trials, 69 dietary treatments, and 230 cows. Results indicated that DCAD affected performance of lactating dairy cows. Maximum milk yield and feed intake were reached when DCAD was 34 and 40 meq/100 g of feed dry matter, respectively. Blood pH and HCO3 concentrations increased with DCAD, indicating an improved acid-base balance of lactating dairy cows. Changes in urinary pH and urinary excretion of Na, K, and Cl were consistent with varying DCAD, thus dietary acidity or alkalinity. The effects of DCAD were likely mediated via modification of acid-base status in the cows.
Key Words: dietary cation-anion difference • acid-base status • dairy cow • meta-analysis
Abbreviation key: DCAD = dietary cation-anion difference, BCAD = blood cation-anion difference, pCO2 = blood CO2 partial pressure
This article has been cited by other articles:
|
|
 |
|
  C. S. Mooney and M. S. Allen Effect of Dietary Strong Ions on Chewing Activity and Milk Production in Lactating Dairy Cows J Dairy Sci, December 1, 2007; 90(12): 5610 - 5618. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. E. Las, N. E. Odongo, M. I. Lindinger, O. AlZahal, A. K. Shoveller, J. C. Matthews, and B. W. McBride Effects of dietary strong acid anion challenge on regulation of acid-base balance in sheep J Anim Sci, September 1, 2007; 85(9): 2222 - 2229. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Hu, M. R. Murphy, P. D. Constable, and E. Block Dietary Cation-Anion Difference and Dietary Protein Effects on Performance and Acid-Base Status of Dairy Cows in Early Lactation J Dairy Sci, July 1, 2007; 90(7): 3355 - 3366. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Hu, M. R. Murphy, P. D. Constable, and E. Block Dietary Cation-Anion Difference Effects on Performance and Acid-Base Status of Dairy Cows Postpartum J Dairy Sci, July 1, 2007; 90(7): 3367 - 3375. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. D. Wildman, J. W. West, and J. K. Bernard Effect of Dietary Cation-Anion Difference and Dietary Crude Protein on Performance of Lactating Dairy Cows During Hot Weather J Dairy Sci, April 1, 2007; 90(4): 1842 - 1850. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. D. Wildman, J. W. West, and J. K. Bernard Effects of Dietary Cation-Anion Difference and Potassium to Sodium Ratio on Lactating Dairy Cows in Hot Weather J Dairy Sci, February 1, 2007; 90(2): 970 - 977. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Apper-Bossard, J. L. Peyraud, P. Faverdin, and F. Meschy Changing Dietary Cation-Anion Difference for Dairy Cows Fed with Two Contrasting Levels of Concentrate in Diets J Dairy Sci, February 1, 2006; 89(2): 749 - 760. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. S. Chan, J. W. West, J. K. Bernard, and J. M. Fernandez Effects of Dietary Cation-Anion Difference on Intake, Milk Yield, and Blood Components of the Early Lactation Cow J Dairy Sci, December 1, 2005; 88(12): 4384 - 4392. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
