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Journal of Dairy Science Vol. 68 No. 7 1835-1840
© 1985 by American Dairy Science Association ®
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Response in Two Commercial Holstein Herds to Addition of Sodium Bicarbonate to Alfalfa Hay-Based Diets

D. L. Bath, S. E. Bishop1, N. G. Peterson2, W. B. Hight3 and E. J. De Peters4

Animal Science Extension, University of California, Davis 95616

ABSTRACT

Feeding trials were conducted in two commercial dairy herds to evaluate the addition of .8% sodium bicarbonate to alfalfa hay-based diets. Approximately half of each herd served as controls and the other half was fed the same diet with sodium bicarbonate. A total of 1280 Dairy Herd Improvement Association lactation records were obtained in the two herds during the trials. Cows in herd 1 were milked three times daily and cows in herd 2 were milked twice daily.

In herd 1, milk production from control and bicarbonate groups was: first lactation cows, 7491 and 7748 kg/cow; second lactation cows, 8363 and 8791 kg/cow; and third and higher lactation cows, 8713 and 9562 kg/cow. There were no differences in milkfat or solids-not-fat percentages between treatment groups.

In herd 2, milk production from control and bicarbonate groups was: first lactation cows, 6800 and 7158 kg/cow; second lactation cows, 8487 and 8082 kg/cow; and third and higher lactation cows, 8807 and 8216 kg/cow. First lactation cows fed sodium bicarbonate had a lower milk fat percentage than controls. There were no other differences in milk fat or solids-not-fat percentages between treatment groups.

FOOTNOTES

1 University of California Cooperative Extension, Riverside County.

2 University of California Cooperative Extension, San Bernardino County.

3 University of California Cooperative Extension, Madera County.

4 Department of Animal Science, University of California, Davis.






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