-
Berça, A.S, Romanzini, E.P, da Silva Cardoso, A, Ferreira, L.E, D’Aurea, A.P, Fernandes, L. B, R. Andrade Reis (2021). Advances in Pasture Management and Animal Nutrition to Optimize Beef Cattle Production in Grazing Systems. In: Advances in Pasture Management and Animal Nutrition to Optimize Beef Cattle Production in Grazing Systems, chapter Animal Feed Science and Nutrition, DOI: 10.5772/intechopen.99687.
-
Sanz-Fernandez, M.V, Daniel, J, Seymour, D.J, Kvidera, S.K, Bester, Z, Doelman, J. and J. Martín-Tereso (2020). Targeting the Hindgut to Improve Health and Performance in Cattle, Animals, 10: 1817.
-
Santos, A, Bergman, J.G.H.E, Manzano, J.A. and M. Hall (2023). Rumen protected calcium gluconate increases average daily gain of beef. Proceedings of the EAAP congress, Lyon, August 27-September 1.
-
Rossi, C.A.S, Grossi, S, van Kuijk, S and S. Vandoni (2024). Effect of the administration of a protected source of calcium gluconate on growth, feed efficiency, nutrient digestibility and health in beef cattle. Proceedings of the ASAS, Calgary, July 21-25.
-
Ibraheem, M, Kvidera, S. and B. Bradford (2021). Meta-analysis to determine the impact of trace mineral source on nutrient digestibility in dairy and beef animals. J. Dairy Sci. 104:97.
-
Spears, J. W., E. B. Kegley, and L. A. Mullis (2004). Bioavailability of copper from tribasic copper chloride and copper sulfate in growing cattle. Anim. Feed Sci. Technol. 116:1-13.Spears et al., 2004. Anim. Feed Sci. Technol. 116:1-13.
Shaeffer, G. L., K. E. Lloyd, and J. W. Spears (2017). Bioavailability of zinc hydroxychloride relative to zinc sulfate in growing cattle fed a corn-cottonseed hull-based diet. Anim. Feed Sci. Technol. 232:1-5.
-
Wagner, J. J. , T. E. Engle, E. Caldera, K. L. Neuhold, D. R. Woerner, J. W. Spears, J. S. Heldt, and S. B. Laudert (2016). The effects of zinc hydroxychloride and basic copper chloride on growth performance, carcass characteristics, and liver zinc and copper status at slaughter in yearling feedlot steers. Prof. Anim. Sci. 32:570-579.
-
Wagner, J., W. T. Nelson, T. Engle, J. Spears, J. Heldt, and S. Laudert (2019). Effect of zinc source and ractopamine hydrochloride on growth performance and carcass characteristics of steers fed in confinement to harvest. J. Anim. Sci. 97 (Suppl. 3):160.
-
Caldera, E., J. J. Wagner, K. Sellins, S. B. Laudert, J. W. Spears, S. L. Archibeque, and T.E. Engle (2016). Effects of supplemental zinc, copper, and manganese concentration and source on performance and carcass characteristics of feedlot steers. Prof. Anim. Sci. 33:63-72.Budde et al., 2019. J. Anim. Sci. 97:1286-1295;
-
Spears, J.W, Loh, H.Y, , Lloyd, K.E, Heldt, J.S, and T.E. Engle (2024) Trace mineral source and chromium propionate supplementation affect performance and carcass characteristics in feedlot steers. J. Anim. Sci. 102:1-8.
Hilscher, F. H., S. B. Laudert, J. S. Heldt, R. J. Cooper, B. D. Dicke, T. L. Scott, and G. E. Erickson (2019). Effect of copper and zinc source on finishing performance and incidence of foot rot in feedlot steers. App. Anim. Sci. 35:94-100.
-
Heldt, J. S. and M. S. Davis (2019). Effects of supplemental zinc source and level on finishing performance, health, and carcass characteristics of beef feedlot steers. App. Anim. Sci. 35:379-387.
-
Heldt, J. S. and S. Davis. 2019. Effects of supplemental copper, zinc, and manganese source on growth performance and carcass characteristics of finishing beef steers. J. Anim. Sci. 97 (Suppl. 2):140-141.
-
Heldt, J., B. Holland, A. Word, and K. Karr (2020). Effect of supplemental trace mineral source on performance, health, and carcass characteristics in finishing beef steers. J. Anim. Sci. 98 (Suppl. 4):157-158.
-
Geary, T. W., R. C. Waterman, M. L. Van Emon, S. Lake, B. A. Eik, D. R. Armstrong, A. L. Zezeski, and J. S. Heldt (2021). Effect of supplemental trace minerals on standard and novel measures of bull fertility. Theriogenology. 172:307-314.
-
Jalali, S., K. D. Lippolis, J. K. Ahola, J. J. Wagner, J. W. Spears, D. Couch, and T. E. Engle (2020). Influence of supplemental copper, manganese, and zinc source on reproduction, mineral status, and performance in a grazing beef cow-calf herd over a 2-year period. App. Anim. Sci. 36:745–753.
-
Engle, T, Farmer, C.G, Spears, J and J.S. Heldt (2024). Copper, manganese, and zinc source and concentration in free-choice mineral supplements influence on production throughout three cow-calf production cycles, ASAS congress, Calgary, July 21-25, 2024.
-
Springman, S. A., M. E. Drewnoski, R. N. Funston (2021). Effects of hydroxy trace mineral supplementation on gain and reproductive performance in beef heifers. Livest. Sci. 245:1-4.
-
Maia Ribeiro, T.L, Francis, F.L, Heldt, J.S, Rusche, W.C. and Z. K. Smith (2023). Evaluation of a ruminally protected blend of pantothenic acid, pyridoxine, folic acid, biotin, and vitamin B12 on finishing steer growth performance, efficiency of dietary net energy utilization, carcass trait responses, and liver abscess prevalence and severity. Translational Animal Science, 7.
-
Ranches, J, Hernandez, G.M, Rezende, A, Ferreira, M, and D. Bohnert (2022) Effects of Late Gestation Supplementation of Vitamin B Complex for Beef Cows. J. Anim. Sci Vol. 100, Suppl. S4, 26-27.
-
Jardon, G.H, Kovarna, M, Moening, K, Brandner, A, Werner, H, Heldt, J.S. and A.C. Baiao Menezes (2023). Effects of a Phytogenic Supplement Pre and Post-Calving on Colostrum Yield and Composition, and Cow-Calf Performance. ,J. Anim. Sci Vol. 101, Suppl. S3 504.
-
Ribeiro, T.L.M, Grimes Francis, B, Smith, Z.K, Francis, F.L, Ross, C, Heldt, J, Rusche, W.C. and E.H. Wall (2024). Evaluation of a phytogenic blend on growth performance, health, carcass traits, and efficiency of dietary net energy utilization in finishing beef steers. J. Anim. Sci Vol. 102, Suppl. S2.