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Ron Kincaid Professor and Animal Scientist Ph.D., University of Georgia Phone: (509)335-2457 E-mail: rkincaid@wsu.edu

MINERAL METABOLISM IN LIVESTOCK. Low intakes and dietary imbalances of mineral elements limit productivity and health of livestock; however, excess intakes increase excretion of these nutrients. Current studies include the gene regulation of selenoprotein expression and strategies to reduce excretion of minerals and improve nutrient management in animal systems.

Specific Research Areas:

• Role of trace elements in metabolism of ruminants.
• Gene expression of metalloproteins.
• Strategies to reduce excretion of minerals by livestock.

Selected Publications :

1. Rumburg, R., G.H. Mount, J. Filipy, B. Lamb, H. Westberg, D. Yonge, R. Kincaid, and K. Johnson. 2008.  Measurement and modeling of atmospheric flux of ammonia from dairy milking cow housing. Atmospheric Environment 42:3364-3379.
2. O’Rourke, E.M., J. Michal, R.L. Kincaid, and J.H. Harrison. 2007. Use of fecal samples as a tool to monitor phosphorus excretion in lactating dairy cows. The Prof. Anim. Sci. 23:536-540.
3. Kincaid, R.L. and M.T. Socha. 2007. Effect of cobalt supplementation during late gestation and early lactation on milk and serum measures. J. Dairy Sci. 90:1880-1888.
4. Hostetler, C.E., J. Michal, M. Robison, T.L. Ott, and R.L. Kincaid. 2006. Effect of selenium intake and fetal age on mRNA levels of two selenoproteins in porcine fetal and maternal liver. J. Anim. Sci. 84:2382-2390.
5. Rumburg, B., G.H. Mount, D. Yonge, B. Lamb, H. Westberg, J. Filipy, J. Bays, R. Kincaid, and K. Johnson. 2006. Atmospheric flux of ammonia from sprinkler application of dairy waste. Atmospheric Environment 40:7246-7258.
6. Kincaid, R.L., D.K. Garikipati, T.D. Nennich, and J.H. Harrison. 2005. Effect of grain source and exogenous phytase on phosphorus digestibility in dairy cows.  J. Dairy Sci. 88:2893-2902.
7. Nennich, T.D., J.H. Harrison, L.M. Van Wieringen, D. Meyer, A.J. Heinrichs, W.P. Weiss, N.R. St-Pierre, R.L. Kincaid, D.L. Davidson, and E. Block. 2005. Prediction of manure and nutrient excretion from dairy cattle.  J. Dairy Sci. 88:3721-3733.
8. Hostetler, C.E. and R.L. Kincaid. 2004. Maternal selenium deficiency increases hydrogen peroxide and total lipid peroxides in porcine fetal liver. Biol. Tr. El. Res. 97:43-56.
9. Hostetler, C.E. and R.L. Kincaid. 2004. Gestational changes in concentrations of selenium and zinc in the porcine fetus and the effects of maternal intake of selenium. Biol. Tr. El. Res. 97:57-70.
10. Hostetler, C.E., R.L. Kincaid, and M.A. Mirando. 2003. The role of essential trace elements in embryonic and fetal development in livestock. The Vet. J. 166:125-139.
11. Kincaid, R.L., L.E. Lefebvre, J.D. Cronrath, M.T. Socha, and A.B. Johnson. 2003. Effect of dietary       cobalt supplementation on cobalt metabolism and performance of dairy cattle. J. Dairy Sci.       86:1405-1414.