Livestock Nutrition Research Program

Dr. Travis Whitney, Project Leader

RESEARCH FOCUS:

Dr. Whitney’s applied Ruminant Livestock Nutrition Research Program is a component of a holistic approach to “Ranching Solutions,” which is the core objective of the Texas A&M AgriLife Research and Extension Center, located in San Angelo, TX. This interdisciplinary program is directed towards helping the livestock industry make more informed and effective management decisions related to livestock production. The primary objective is to reduce costs associated with feeding livestock by: 1) increasing livestock production efficiency; 2) increasing the value of underutilized feed sources such as dried distillers grains and ground woody products such as juniper and mesquite trees; and 3) using plant secondary compounds to enhance ruminal microbial efficiency, bypass protein, and animal health (e.g., reduce internal parasites). Secondary objectives are to enhance animal fiber, carcass, meat, and milk characteristics.

 

MOST RECENT PEER-REVIEWED ARTICLES: (* denotes graduate student)

Published

  • Whitney, T. R., and S. Smith. 2015. Substituting redberry juniper for oat hay in lamb feedlot diets: Carcass characteristics, adipose tissue fatty acid composition, and sensory panel traits. Meat Sci. 104:1−7. doi: 10.1016/j.meatsci.2015.01.010
  • *Stewart, W. C., T. R. Whitney, E. J. Scholljegerdes, R. P. Adams, H. D. Naumann, N. M. Cherry, J. P. Muir, B. D. Lambert, J. W. Walker, R. P. Adams,  K. D. Welch, D. R. Gardner, and R. E. Estell. 2015. Effects of Juniperus species and stage of maturity on nutritional, in vitro digestibility, and plant secondary compound characteristics. J. Anim. Sci. 93:4034−4047.
  • Whitney, T. R. 2017. Ground Juniperus pinchotii and urea in supplements fed to Rambouillet ewe lambs: I. Feedlot growth traits, blood serum parameters, and fecal characteristics. J. Anim. Sci. 95:3676−3686. doi: 10.2527/jas2017.1419
  • Whitney, T. R., J. L. Glasscock, J. P. Muir, W. C. Stewart, and E. J. Scholljegerdes. 2017. Substituting ground woody plants for cottonseed hulls in lamb feedlot diets: growth performance, blood serum chemistry, and rumen fluid parameters. J. Anim. Sci. 95:1−14. doi: 10.2527/jas2017.1649
  • *Stewart, W. C., Whitney, T. R., E. J. Scholljegerdes, D. M. Hallford, J. W. Walker, R. P. Adams, and H. D. Naumann. 2017. Effects of feeding ground redberry juniper (Juniperus pinchotii) to gestating ewes on pre- and postpartum performance, serum metabolites and hormones, milk fatty acid composition and progeny preweaning performance. J. Anim. Sci. 95:4113−4123. doi: 10.2527/jas2016.1090
  • Ishaq, L., C. J. Yeoman, and T. R. Whitney. 2017. Ground Juniperus pinchotii and urea in supplements fed to Rambouillet ewe lambs. Part 2: Ewe lamb rumen microbial communities. J. Anim. Sci. doi: 10.2527/jas2017.1731
  • Kerth, C. R., K. R. Wall, S. B. Smith, T. R. Whitney, J. L. Glasscock, and J. T. Sawyer. 2018. Substituting ground woody plants for cottonseed hulls in lamb feedlot diets: Carcass characteristics, adipose tissue fatty acid composition, and sensory panel traits. J. Anim. Sci. 96:487−497  doi: 10.1093/jas/sky024
  • *Glasscock, J. L., T. R. Whitney, J. R. Roper, A. R. Holmes, S. G. Marrs, W. C. Stewart, and E. J. Scholljegerdes. 2018. Substituting ground woody plants for cottonseed hulls in goat feedlot diets: growth performance and blood serum chemistry. J. Anim. Sci. doi 10.1093/jas/sky159

 Submitted

  • Whitney T. R., J. T. Sawyer, L. O. Tedeschi, and E. A. Colombo. 2018. Substituting ground Juniperus spp. for ground alfalfa hay in steer feedlot diets: growth performance and blood serum chemistry. J. Anim. Sci.
  • Naumann, H. D., W. C. Stewart, and T. R. Whitney. The effect of maturity on concentration and biological activity of protein precipitable polyphenols in juniper is dependent upon species Anim. Feed Sci. Technol.

 Coming Up

  • *Stewart, W. C., T. R. Whitney, E. J. Scholljegerdes, J. W. Walker, and R. P. Adams. Effects of selection for high and low juniper-consuming goats on rumen fermentation characteristics.
  • *Glasscock, J. L., T. R. Whitney, D. G. Hewitt, and S. M. Cooper. Use of ground juniper to reduce feral hog consumption.
  • Kerth, C., T. W. Murphy, W. C. Stewart, T. R. Whitney, J. Boles, and R. Miller. Sire breed, harvest age, and diet effects on the flavor profile and consumer acceptance of American lamb.
  • Brady, J. A., W. C. Stewart*, T. R. Whitney, E. J. Scholljegerdes, C. J. Yeoman, R. P. Adams, D. L. Waldron, J. W. Walker, and J. M. B. Musser. Rumen microbial characteristics of goats selectively bred to have greater consumption of Juniperus pinchotii forage.
  • *Glasscock, J. L., T. R. Whitney, D. G. Hewitt, and S. M. Cooper. Use of ground juniper in white-tailed deer supplements.
  • *Hodges, T. R. Whitney, and S. Ramsey. Replacing cottonseed meal and sorghum grain with corn dried distillers grains with solubles in lamb feedlot diets: growth performance, blood serum chemistry, and rumen fluid parameters. J. Anim. Sci.
  • *Hodges, C. R. Kerth, T. R. Whitney, and S. Ramsey. Replacing cottonseed meal and sorghum grain with corn dried distillers grains with solubles in lamb feedlot diets: carcass characteristics, adipose tissue fatty acid composition, and sensory panel traits. J. Anim. Sci.

 

MOST RECENT PRESENTATIONS, PROCEEDINGS & ABSTRACTS:

  • Whitney, T. R. 2017. Underutilized feed resources. Texas A&M AgriLife Research and US Forest Service Conference: Strategic Supplementation Strategies to Enhance Texas Rangelands and Reduce Livestock Production Costs. May 12. Kerrville, TX. Oral Presentation.Whitney, T. R. 2017. Economic feasibility of using ground juniper in livestock diets. Texas A&M AgriLife Research and US Forest Service Conference: Strategic Supplementation Strategies to Enhance Texas Rangelands and Reduce Livestock Production Costs. May 12. Kerrville, TX. Oral Presentation.
  • Whitney T. R., J. T. Sawyer, and C. Hartz. 2017. Substituting ground juniper for ground alfalfa hay in steer feedlot diets: growth and blood serum characteristics. West. Sec. Amer. Soc. Anim. Sci. annual meeting. June 20 – 23. Fargo, ND. Proceedings and Oral Presentation by Whitney. J. Anim. Sci. 68:239−243.
  • Whitney, T. R. 2017. Economic and marketing opportunities for ground aspen wood to be used as a livestock feed ingredient. Industry meeting with Univ. of Minnesota Faculty, Marth Companies and Great Lakes Renewable Energy, Inc. Aug. 14. Oral Presentation. Invited.
  • Whitney, T. R. 2017. Nutritional challenges of accelerated lambing, lamb feedlot nutrition, and enhancing rumen function. Zinpro, Inc.: joint meeting with C.P. Pokphand Co. (Vice President, Adirek Sripratak). Aug. 16. Oral Presentation. Invited.
  • Whitney, T. R. 2017. Challenges vs. opportunities of various supplemental feeds. 44th Annual Texas A&M AgriLife Sheep and Goat Field Day. Aug. 18. San Angelo, TX. Oral Presentation. Invited.
  • Whitney, T. R. 2017. Using unique feed supplements and ingredients in livestock diets. 2nd Annual Texas A&M AgriLife Expo. Aug. 18. San Angelo, TX. Oral Presentation. Invited.
  • Kerth, C. R., T. W. Murphy, W. C. Stewart, J. A. Boles, T. R. Whitney, and R. K. Miller. 2018. Effects of plant secondary compounds found in Juniperus spp. on yearling Rambouillet wethers feedlot performance, carcass characteristics, adipose tissue fatty acid composition, and sensory panel traits. Amer. Soc. Anim. Sci. annual meeting. July 12. Vancouver, Canada. Abstract. Oral presentation by Whitney. J. Anim. Sci.
  • Brady, J., Stewart, W. C., T. R. Whitney, E. J. Scholljegerdes, C. J. Yeoman, R. P. Adams, D. F. Waldron, J. W. Walker, and J. M. B. Musser. Rumen microbial characteristics of goats selectively bred to have greater consumption of Juniperus spp. forage. Amer. Soc. Anim. Sci. annual meeting. July 12. Vancouver, Canada. Abstract. Poster presentation by Whitney. J. Anim. Sci.
  • *Glasscock, J. L., David G. Hewitt, T. R. Whitney, S. M. Cooper, F. C. Bryant, and C. M. Toenjes. 2018. Use of ground juniper in wildlife and livestock feeds. 54th Annual Meeting of the Texas Chpt. Wildl. Soc. Feb. 9-11. Dallas, TX.

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