Gaëtan Tremblay, Ph.D.

Image Gaëtan Tremblay
Research Scientist

Nutritional Value in Ruminant Feed

Current research and/or projects

  • Improving the nutritive value of ruminant feed to maximize the use of forages and reduce production costs and environmental impacts.

Research and/or project statements

  • Increase the production and use of alfalfa forages in Canada.
  • Improving forage energy / protein ratio to increase dairy cow performance and reduce environmental losses.
  • Evaluation of the interest of using a more digestible alfalfa on Quebec dairy farms.
  • Evaluation of forages and their management in order to respond to a fodder supply problem linked to water deficits.

Professional activities / interests

  • Methods of studying and analysing the nutritive value of ruminant feed, specifically dry or ensiled forages.
  • Characterization of the effects of species, cultivars, management and different harvesting and storage methods on the nutritive value of forages.
  • Use of rumen-cannulated cows for measuring in vitro digestibility of dry matter and fibre in ruminant feed.
  • Use of near-infrared spectroscopy (NIRS) to predict the nutritive value of ruminant feed; use of laboratory silos.

Education and awards

  • B.Sc. Bio-Agronomy, Université Laval, 1983.
  • Ph.D. Animal nutrition, Université Laval. 1988.

International experience and/or work

  • Work transfer at the US Dairy research Center, Madison, WI (1992-1993

Key publications

  1. Thivierge, M.-N., Chantigny, M., Lafond, J., Maillard, É., Leewis, M.-C., Bertrand, N., Lachance, C., Duchesneau, R.-F., Khechine, M.T., Pelletier, K., Houde, S., Pelster, D., Halde, C., Charbonneau, É., Hassanat, F., Jégo, G., Angers, D.A., Bélanger, G., Tremblay, G., Vanasse, A., Samson, M.-É., and Royer, I. 2023. The PERMANENCE project: legacy effect of perennials and organic fertilizers in crop rotations for dairy farms. Hosting of a provincial team of MAPAQ farm advisors and visit to research plots, Saint-Augustin-de-Desmaures, QC, September 1, 2023.

    2023 - View publication details

  2. Poulin, A-A., Hassanat, F., Tremblay, G., Ouellet, D., Petri, R., Thériault, M., Claessens, A., Bertrand, A. et Charbonneau, É. 2022. Variation of the alfalfa energy-to-protein ratio to maximize nitrogen use efficiency by rumen microbes. ADSA Annual Meeting, June 25-28, 2023, Ottawa, ON, Canada [poster] and J. Dairy Sci. 106(Suppl. 1): 1133M. [Abstract]

    2023 - View publication details

  3. Thivierge, M.-N., Chantigny, M., Lafond, J.A., Royer, I., Lachance, C., Duchesneau, R.-F., Maillard, É., Leewis, M.-C., Pelster, D., Khechine, M.T., Pelletier, K., Halde, C., Hassanat, F., Bélanger, G., Angers, D.A., Samson, M.-É., Jégo, G., Charbonneau, É., and Tremblay, G.F. 2023. Le projet PERMANENCE: démonstration des mesures prises au champ et sommaire des principaux résultats. 37th Annual Meeting of the Association québécoise des spécialistes en sciences du sol (AQSSS), Québec, Canada, May 23–25, 2023. Oral presentation.

    2023 - View publication details

  4. Seguin, P., G. Tremblay, M. Thériault, X. Godin, S. Bittman, D. Hunt, J. Hakl, G. Belanger, M. N. Thivierge, A. Bertrand, and A. Claessens. 2022. Addition of red clover or birdsfoot trefoil in alfalfa-based forage mixtures to improve the energy to protein ratio. International Grassland Congress, May 14-19, 2023, Covington, KY, USA [poster]

    2023 - View publication details

  5. Claessens, A., Seguin, P., Thériault, M., Hassanat, F., Tremblay, G. 2023. Améliorer la valeur nutritive des fourrages par l’amélioration génétique et la gestion des cultures. Série webinaire Pleins feux sur la recherche laitière au Canada, 27 avril 2023, DFC and ACER counsulting, présentation virtuel.

    2023 - View publication details

  6. Khechine, M.T., Thivierge, M.-N., Chantigny, M. H., Charbonneau, É., Brégard, A., Tremblay, G. F., Bélanger, G., Hassanat, F., Jégo, G., and Halde, C. 2023. Arrière-effet des engrais organiques et des prairies sur la performance des rotations de cultures. Journée d’information scientifique – Bovins laitiers et plantes fourragères, Drummondville, QC, February 8, 2023. Oral presentation.

    2023 - View publication details

  7. Poulin, A-A., Hassanat, F., Tremblay, G., Ouellet, D., Petri, R., Thériault, M., Claessens, A., Bertrand, A. et Charbonneau, É. 2023. L’efficacité d’utilisation de l’azote par les microbes du rumen est affectée par le ratio énergie/protéines de la luzerne. Journée d'information scientifique sur les bovins laitiers et les plantes fourragères. 8 février 2023, Drummondville, QC. CRAAQ [affiche]

    2023 - View publication details

  8. Bélanger, G., Claessens, A., Thivierge, M.-N. et Tremblay, G. (Éd. sc.). 2022. Guide de production – Plantes fourragères. 2e éd. Vol. 1. Centre de référence en agriculture et agroalimentaire du Québec. 273 p. ISBN 978-2-7649-0636-1.

    2022 - View publication details

  9. Khechine, M.T., Thivierge, M.-N, Chantigny, M.H., Charbonneau, É., Tremblay, G.F., Hassanat, F., Jégo, G., Brégard, A., Bélanger, G., and Halde, C. Six years, six rotations: How much yield? 13th annual conference of the Canadian Forage and Grassland Association (CFGA), Moncton, NB, and online (Zoom), November 29-December 2, 2022. Poster presentation, virtual.

    2022 - View publication details

  10. Poulin, A-A., Hassanat, F., Tremblay, G., Ouellet, D., Petri, R., Thériault, M., Claessens, A., Bertrand, A. et Charbonneau, É. 2022.Variation du ratio énergie/protéines de la luzerne pour maximiser l’efficacité de l’utilisation de l’azote par les microbes du rumen. Symposium sur les bovins laitiers, 2 novembre 2022, Drummondville, QC. CRAAQ.

    2022 - View publication details

  11. Khechine, M.T., Thivierge, M.-N., Chantigny, M.H., Charbonneau, É., Tremblay, G.F., Hassanat, F., Jégo, G., Brégard, A., and Halde, C. 2022. Six ans, six rotations : Quels rendements en fourrages ? 46e Symposium sur les bovins laitiers, Drummondville, QC, November 2, 2022. Poster (hybrid mode).

    2022 - View publication details

  12. F. Hassanat, G. Tremblay, P. Seguin, M. Theriault, X. Godin, S. Bittman, D. Hunt, J.
    Hakl, G. Belanger, M. N. Thivierge, A. Bertrand, and A. Claessens. 2022. Red clover addition to improve the energy to protein balance of alfalfa-based forage mixtures. J. Dairy Sci. 105(Suppl. 1): 1518V. (Abstr.)

    2022 - View publication details

  13. https://www.acfas.ca/evenements/congres/programme/89/200/206/c

    2022 - View publication details

  14. Tremblay, G., Seguin, P., Godin, X., Bittman, S., Hunt, D., Hakl, J., Bélanger, G., Thivierge, M.-N., Bertrand, A., Claessens, A. 2022. Le trèfle rouge améliore le ratio énergie/protéines des mélanges fourragers à base de luzerne. 89e Congrès annuel de l’Acfas, Université Laval, Québec, 7 au 13 mai 2022.

    2022 - View publication details

  15. Claessens et al. 2022. ASC Increasing the production and utilization of alfalfa forages in Canada. Annual Performance Report to DPC. 21 pages.

    2022 - View publication details

  16. Perreault Gagnon, M., M.-N. Thivierge, C. Halde, K. Glover, K. Schneider, M. Thériault, G.F. Tremblay, Y. Papadopoulos, G. Bélanger et A. Claessens. 2021. Rendement et ratio sucre soluble:protéine de mélanges fourragers avec ou sans plante-abri à l’année d’établissement. 12eme conférence de l’ACPF, 14-16 décembre 2021, en virtuel. [Affiche]

    2021 - View publication details

  17. Perreault Gagnon M., Thivierge, M.-N., Halde, C., Glover, K., Schneider, K., Thériault, M., Tremblay, G.F., Papadopoulos, Y., Bélanger, G., and Claessens, A. 2021. La performance agronomique de mélanges fourragers à base de luzerne selon la diversité des espèces et l’utilisation d’une plante-abri à l’établissement. 45e Symposium sur les bovins laitiers, Drummondville (hybrid mode), QC, November 10, 2021. Poster.

    2021 - View publication details

  18. Godin, X., Tremblay, G. F., Seguin, P., Bittman, S., Hunt, D., Hakl, J., Bélanger, G., Thivierge, M. N., Bertrand, A., Thériault, M., & Claessens, A. (2021) The Energy to Protein Balance Is Improved By Red Clover Addition in Alfalfa-Based Forage Mixtures [Abstract]. ASA, CSSA, SSSA International Annual Meeting, Salt Lake City, UT. https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/136568

    2021 - View publication details

  19. Godin, X., Tremblay, G. F., Seguin, P., Bittman, S., Hunt, D., Hakl, J., Bélanger, G., Thivierge, M. N., Bertrand, A., Thériault, M., & Claessens, A. (2021) Red clover improves the energy to protein balance of lucerne-grass herbage. Joint XXIV International Grassland Congress and XI International Rangeland Congress, Nairobi, 2021/10/23 - 2021/10/29. [Poster]

    2021 - View publication details

  20. Aubé, L., Guay, F., Bergeron, R., Bélanger, G., Tremblay, G.F., Edwards, S.A., Guy, J.H., Devillers, N. (2021). Feed restriction and type of forage influence performance and behaviour of outdoor gestating sows. Animal, [online] 15(10), http://dx.doi.org/10.1016/j.animal.2021.100346

    2021 - View publication details

Research facility

2560 Hochelaga Boulevard
Québec, QC G1V 2J3
Canada

Affiliations

  • Adjunct Professor, Department of Animal Science, Department of Plant Science, Université Laval.
  • Member of the Forage Crops Committee of the Centre de références en agriculture et agroalimentaire du Québec (CRAAQ).
  • Web master for the "Plantes fourragères" page of Agri-Réseau site.

Language

English
French