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Journal of Animal Science, Vol 79, Issue 4 1059-1063, Copyright © 2001 by American Society of Animal Science

JOURNAL ARTICLE

Evaluation of titanium dioxide as a digestibility marker for cattle

E. C. Titgemeyer, C. K. Armendariz, D. J. Bindel, R. H. Greenwood and C. A. Loest
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-1600, USA. etitgeme@oznet.ksu.edu

Three studies were conducted to evaluate titanium dioxide (TiO2) as a digestibility marker for cattle. In Exp. 1, eight steers consumed prairie hay ad libitum with or without dietary supplements. Fecal recovery of TiO2 averaged 93% and was not affected (P = 0.47) by supplement. Digestibilities calculated with reference to TiO2 were not different (P = 0.15) from those based on total fecal collections. In Exp. 2, two steers were limit-fed corn-based diets. Fecal recovery of TiO2 averaged 95% and that of chromic oxide (Cr2O3) averaged 113%. Digestibilities calculated with reference to TiO2 were underestimated (P < 0.01) by 1.1 percentage units relative to those based on total fecal collections, and those calculated with reference to Cr2O3 were overestimated (P < 0.01) by 2.0 percentage units. In Exp. 3, eight steers in a replicated 4 x 4 Latin square consumed corn-based diets ad libitum. Fecal recovery of TiO2 averaged 90%, whereas that of Cr2O3 averaged 98%. Digestibilities calculated with reference to TiO2 were underestimated (P < 0.01) by 1.6 to 4.3 percentage units, whereas those calculated with reference to Cr2O3 were not different (P = 0.31) from those based on total fecal collections. Future research is warranted to determine the usefulness of TiO2 in measuring digestibility in cattle.


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W. D. Myers, P. A. Ludden, V. Nayigihugu, and B. W. Hess
Technical Note: A procedure for the preparation and quantitative analysis of samples for titanium dioxide
J Anim Sci, January 1, 2004; 82(1): 179 - 183.
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