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Journal of Dairy Science Vol. 57 No. 4 472-475
© 1974 by American Dairy Science Association ®
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Effect of Dietary Sodium and Potassium on Udder Edema in Holstein Heifers1

W. E. Randall2, R. W. Hemken3, L. S. Bull and L. W. Douglas

Dairy Science Department, University of Maryland, College Park 20742

ABSTRACT

Holstein heifers in first lactation were fed one of four rations starting about 30 days prepartum: (1) no supplemental sodium or potassium, (2) added sodium chloride, (3) added potassium chloride, or (4) added sodium and potassium chloride. All supplements were offered at 227 g per day. Average edema ratings were lower for those animals fed the nonsupplemented ration compared with the other three rations. Correlations of blood serum protein, potassium, sodium, and osmolarity with edema were small. A second trial designed to study the effect of 4% supplemented potassium chloride with 1% supplemented sodium chloride indicated that effects of potassium on udder edema may differ with higher potassium intake.

FOOTNOTES

1 University of Maryland Scientific Paper A-1942, Contribution No. 4869 of the Maryland Agricultural Experiment Station.

2 These data are part of a thesis submitted by the senior author to the Graduate Faculty in partial fulfillment of the requirements for the Master of Science degree.

3 Present-address: Animal Sciences Department, University of Kentucky, Lexington 40506.




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Copyright © 1974 by the American Dairy Science Association ®.