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David A. Roland
Distinguished University Professor
Office: 202-F Poultry Science Building
Mailing Address:
Department of Poultry Science
Auburn University
201 Poultry Science Building
Auburn, AL 36849-5416
Phone: 334-844-2605
FAX: 334-844-2641
E-mail: roland1@auburn.edu

EDUCATION:

1970 - Ph.D., Poultry/ Nutritional Biochemistry, University of Georgia
1966 - B.S., Agriculture, University of Georgia
1962 - A.S., Middle Georgia

RESEARCH:

Primary research interests have been dealing with mineral, lipid, protein and vitamin metabolism and management particularly in regard to shell quality. Major emphasis has been devoted to developing a new method of feeding called 'Economic Feeding and Management of Laying Hens' and reducing environmental pollution.

SELECTED SCIENTIFIC PUBLICATIONS:

Wu, G., M.M. Bryant, Z. Liu, and D.A. Roland, Sr.,2005. Comparison of Natuples® and Phyzyme® as phytase sources for commercial leghorns. Fed Corn Soy diets. ( corrected and resubmitted 6/29/05)

Bateman, A., Z. Liu, M.M. Bryant, F. Wu and D.A. Roland, Sr. 2005. Explanation on how to interpret properly the bioeficiency of methionin hydroxyl analog-free acid relative to DL-methionin estimated by regressive models on laying hens. International journal of Poultry Science 4 (5): 280-285.

Bateman, A. , Z. Liu and D.A. Roland, Sr. 2005. Bioefficiency determination of McPhionine hydroxy proxy free acid compared to DL-methinine in laying hens with limited methivnine using different regression models. Submitted British J. of P.S. (4/26/05)

Wu, G., Z-Liu, M.M. Bryant, R. A. Voitle and D.A. Roland, Sr. 2005. Influence of dietery energy on performance and egg compostition of Bovans White and Dekalb white in phase I. Poultry Science (accepted) 6/20/05

Wu, G., Z-Liu, M.M. Bryant, R. A. Voitle and D.A. Roland, Sr. 2005. Influence of Phyzyme XP on commercial legorns. Fed corn-soy diets. Poultry Science. (Accepted.)

Wu, G., Z-Liu, M.M. Bryant, R. A. Voitle and D.A. Roland, Sr. 2005. Effects of added synthetic lysium or second cycle commercial lephorns. While maintaining the methivine and cystine/Lysine ratio at 0.75. Jig applied P.S.(Accepted)

Wu, G., Z. Liug M.M. Bryant and D.A. Roland, Sr., Performance comparison and nutrient requirements of five commercial layer strains in Phase IV. International jig P.S.: accepted.

Wu, G., M.M Bryant, R. A. Voitle, and D.A. Roland, Sr., 2005. Effects of B-mannonase in corn-soy diets on commercial Leghorns in phase III of the second cycle. Poultry Science 84: 894-898

Liu, Z., G. Wu, A. Bateman, M.M. Bryant, B. Zinner and D.A. Roland, Sr., 2005. Performance comparison between DL-Methionine and DL Methionine hydroxy analogue in layers on a unequal molar basis. Submitted applied Poultry Science: Accepted

Liu, Z., Wu, G., M.M. Bryant and D.A. Roland, Sr., 2005. Influence of added synthetic lysine for first phase second cycle commercial leghorns with the methionine + cystine/lysine ratio maintained at .75. (corrected & returned 11/11/04. (Accepted 11/16/04).

Liu, Z., M.M. Bryant and D.A. Roland, Sr., 2005. Layer performance and phytase retention as influenced by copper sulfate, pentahydrate and tribasi copper chloride. Submitted J. Of Applied Poul. Sci. 10/15/04. (Accepted 12/3/04).

Liu, Z., M.M. Bryant, and D.A. Roland, Sr., 2004. Bioavailability estimation of DL-methionine hydroxy analogue relative to DL-methionine in layers fed milo-soybean diets using different regression models. J. Of Applied Poul. Sci. 13: pp 461-467.

Liu, Z., A. Bateman, S.S. Sohail, B. Zinner and D.A. Roland, Sr., 2004. Statistical sensitivity required to detect any potential difference of bioavailabilities between DL-methionine and DL-methionine hydroxyl analogue in layers. Int’l. J. Of Poul. Sci. 3(11): 697-703.

Liu, Z., A. Bateman, M.M. Bryant, A. Abebe and D.A. Roland, Sr., 2004. Estimation of bioavailibility of DL-methionine hydroxy analogue relative to DL-methionine in layers with exponential and slope-ratio models. Poultry Sci. 83: 1580-1586.

Liu, Z., G. Wu, M.M. Bryant and D.A. Roland, Sr., 2004. Influence of added synthetic lysine on low protein diets with the methionine + cystine/lysine ration maintained at .75. Int’l J. of Poul. Sci. 3(31):220-227.

Sohail, S.S., M.M. Bryant and D.A. Roland, Sr., 2004. Effects of reducing egg density on performance and economics of second cycle (force rested) commercial leghorns. J. of Applied P.S. 13: 401-411 4/17/04.

Sohail, S.S., M.M. Bryant and D.A. Roland, Sr., 2003, The effect of glyclue supplementation on performance of broilers fed sub-marginal protein with adequate synthetic methionine and lysine. Int’l J. of Poul. Sci. 2(6): 394-397.

Ahmad, Hafiz Anwar, S.S. Yadalom and D.A. Roland, Sr., 2003, Calcium requirements of bovan hens. Int’l J. of Poul. Sci. 2(6): 417-420.

Ahmad, Hayiz Anwar and David A. Roland, Sr., 2003, Efficient feeding of molted hens with different feeding and formulated method. Int’l J. of Poul. Sci. 2(6): 383-388.

Sohail, Syed, M.M. Bryant and D.A. Roland, Sr., 2003, Partial explanation for differences in response of hens fed diets formulated based on lysine vs. protein. Int’l J. of Poul. Sci. 2(5): 345-350.

Sohail, Syed, M.M. Bryant and D.A. Roland, Sr., 2003, Influence of adding synthetic lysine in corn and soy diets for commercial leghorns. Int’l J. of Poul. Sci. 2(5):335-340.

Sohail, Syed, Mary Bryant and D.A. Roland, Sr., 2003, Effect of reducing cage density on performance and economics of seasonal cycle (force molted) commercial leghorns. J. of Applied Poul. Sci. Submitted 5/28/03.

Ahmad, Hayiz Anwar and D.A. Roland, Sr., 2003, Effect of Environmental Temperature and TSAA Level on Performance and Profitability of Laying Hens: An Econometric Approach. J. of Applied Poultry Science. 12:476-482.

Amhad, Hayiz Anwar and D.A. Roland, Sr., 2003, Effect of Method of Feeding and Feed Formulation on Performance and Profitability of Laying Hens: An Econometric Approach. J. of Applied Res. 12:291-298.

Sohail, S.S., M.M. Bryant and D.A. Roland, Sr., 2003, Influence of dietary fat on Econometric return of commercial leghorns. J. of Applied Res. 12:356-361.

Berry, W.D., J.B. Hess, R.J. Lien, and D.A. Roland, Sr., 2003. Egg Production, Fertility, and Hatachability of Breeder Hens fed Dietary Phytase. J. or Applied Res. 12:264-270.

Roland, D.A., Sr., Hafiz Anwar Ahmad, S.S. Yadalam and Ted Seftonn, 2003. Effect of non-genetically Modified Phytase on Commercial Leghorns. J. of Poul. Res. 12:257-263.

Sohail, S.S., M.M. Bryant, D.A. Roland, Sr., Juha H.A. Apajalahti and Ernest M. Pierson, 2002. Influence of Avizyme® 1500 (Finnfeed, Danisco Cultor) on Performance of Commercial Leghorns, J. of Applied Poultry Res. 12:284-290.

Sohail, S.S. and D.A. Roland Sr., 2002. Influence of Dietary Phosphorus on Performance of Hyline W36 Hens. Poultry Sci. 81:75-83.

Sohail, S.S., M.M. Bryant and D.A. Roland, Sr. Partial explanation for difference on response of hens fed diet formulated based on protein vs lysine. Poultry Sci. (Submitted 6/4/01).

Sohail, S.S., M.M. Bryant and D.A. Roland, Sr., 2001. Influence of adding synthetic lysine on hens fed diets formulated based on lysine and diets formulated based on protein. Poultry Sci. (submitted 3/7/01).

Anwar, H. Ahmad, S.S. Yadalam, R.A. Voitle, and D.A. Roland, Sr., 2001. Calcium requirement of Bovans Hens. J. of Applied P.S. (Submitted 1/15/01).

Anwar, A. and D.A. Roland, Sr., 2001. Effect of Method of Formulation and Feeding on Performance and Profitability of Laying hens. An Econometric Approach. J. Applied P.S. 10:162-171.

Sohail, S.S., M.M. Bryant, S.K. Rao and D.A. Roland, Sr., 2001. Influence of Cage Density and Prior Dietary Phosphorus level on Phosphorus Requirement of Commercial Leghorns. Poultry Sci. 80:769-775.

Ahmad, Anwar Ahmad, Gerry V. Dozier, and David A. Roland, Sr., 2001. Egg Price forecasting using several Networks. Journal of Applied Poultry Science. 10:162-171.

Punna, S. and D.A. Roland, Sr., 2001. Influence of dietary phytase supplementation on Incidence and Severity in Broilers Divergently selected for Tibial Dyschondroplasia. Poultry Science. 80:735-740.

Zhang, X., D.A. Roland, Sr., G.R. McDaniel and S.K. Rao, 2001. Effectiveness of Nataphus phytase in improving performance of broiler breeder hens. Poultry Sci. (In press).

Roland, David A., Sr., and Mary Bryant, 2000. Nutrition and Feeding for Optimum Egg Shell Quality. World’s Poultry Science, pp. 25 - 30.

Punna, S. and D.A. Roland, Sr., 2000. Dietary supplementation of phytase and Hy-Line W-36 pullets fed varying levels of dietary phosphorus from Day 1 through 18 wk. J. Applied Poultry Sci. 9:35-42.

Sefton, A.E., M.N. Bryant and D.A. Roland, Sr., 2000. Supplementation of Layer Rations with two Commercial Phytase Enzymes. (Submitted).

Sohail, S.S. and D.A. Roland, Sr., 2000. Influence of phytase on calcium utilization in commercial leghorns. J. of Applied Poultry Sci. 9:81-87.

Punna, S. And D.A. Roland, Sr., 2000. Influence of supplemental microbial phytase on first cycle laying hens fed phosphorus-deficient diets from day 1 of age. Poultry Sci. 78:1407-1411.

Zhang, S.Y., D.A. Roland, Sr., S.K. Rao and G. McDaniel, 1999. Effect of Microbial Phytase supplementation to low protein diets on performance, ileal digestibility of protein and Amino Acid. Poultry Sci. 78:1567-1572.

Zhang, X., W.D. Berry, G.R. McDaniel, D.A. Roland, Sr., P. Liu, C. Calvert and R. Wilhite, 1999. Body weight and Semen production of broiler, breeder males as influenced by crude protein level, and feeding regimes during rearing. Poultry Sci. 79:190-196.

Sohail, S.S. and D.A. Roland, Sr., 1999. Influence of Supplemental Phytase on Performance of Broilers 4-6 weeks of age. Poultry Science. 78:550-555.

Gordon RW and David A. Roland, Sr. 1999. Ascertaining in vivo phosphate solubilization in minimal recovery that techniques are phosphorus sources. Journal of Applied Poultry Science. 8: 48-53.

Punna, Sreenivasula and David Roland, Sr. 1999. Variation in the utilization of phytate phosphorus within the same broiler strain. Journal of Applied Poultry Science. 8: 10-16.

Roland DA Sr., MM Bryant, JX Zhang, SK Rao, David Roland Jr. 1999. Econometric Nutrition and Management I: Maximizing profits on Hy-Line W-36 hens by optimizing feeding method, total sulfur amino acid intake and environmental temperature. Journal of Applied Poultry Science. 7: 401-411.

Sohail SS, Roland DA Sr. 1999. Influence of supplemental phytase on performance of broilers four to six weeks of age. Poultry Sci. 78(4): 550-555.

Zhang X, Berry WD, McDaniel GR, Roland DA, Liu P, Calvert C, Wilhite R. 1999. Body weight and semen production of broiler breeder males as influenced by crude protein levels and feeding regimens during rearing. Poultry Sci. 78(2): 190-196.

Gordon RW, Roland DA, Sr. 1998. Influence of supplemental phytase on calcium and phosphorus utilization in laying hens. Poultry Sci. 77(2): 290-294.

Zhang X, McDaniel GR, Roland DA. 1998. Genetic variation of phytate phosphorus utilization from hatch to three weeks of age in broiler chicken lines selected for incidence of tibial dyschondroplasia. Poultry Sci. 77(3): 386-390.

Staff Photo:

Matilda Bryant
Research Associate IV
mbryant@auburn.edu