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Journal of Dairy Science Vol. 53 No. 9 1279-1282
© 1970 by American Dairy Science Association ®
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Sampling Methods for Water Kinetics1

K. L. Knox, A. Chappell, J. A. Gibbs2, D. N. Hyder and R. E. Bement2

Cooperative Investigations of the Crops Research Division, Agricultural Research Service, USDA, and the Colorado Agricultural Experiment Station, Fort Collins 80521

ABSTRACT

In a Holstein steer, jugular blood, saliva, 24-hour urine collection, urine by palpation, and respired-water were compared to determine their reliability and convenience for tritium assay in water kinetic studies. No significant differences (P > .05) in rate of tritium dilution occurred among the various procedures. However, the collection and assay of respired-water was the most convenient method. Further comparison of jugular blood and respired-water collected from 12 lambs revealed no significant difference (P > .05) in tritium dilution.

FOOTNOTES

1 This research was supported in part by NSF Grant GB7828 and Colorado Agr. Expt. Sta. Project 238.

Department of Animal Science, Colorado State University, Fort Collins.






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