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Iwaasa, Alan, Ph. D.

Gestion du pâturage

Coordonnées :

1, chemin Airport
C.P. 1030
Swift Current, (Saskatchewan) S9H 3X2
Téléphone : 306-770-4473
Télécopieur : 306-770-4411
Courriel : alan.iwaasa@agr.gc.ca

Domaines d'expertise :

  • Gestion du pâturage de prairies indigènes et cultivées
  • Caractérisation de la qualité des fourrages et avantage pour la production du bœuf
  • Élaboration de pratiques de gestion bénéfiques (PGB) et de systèmes de pâturage durables environnementaux

Projets en cours :

  • Mesurer et évaluer les parcours canadiens et d’autres pratiques bénéfiques de gestion agricole avec Holos, un modèle d’exploitation agricole intégré amélioré
  • Pratiques de gestion bénéfiques pour la réintroduction de sainfoin dans les pâturages existants de luzerne et de graminées pour l’Ouest canadien (graminées, légumineuses) et de mélanges pour la production fourragère dans la région des Prairies
  • Élaboration de PGB pour l’établissement rentable et fructueux de fourrages en sols salins pour la Saskatchewan
  • Nouveaux mélanges de légumineuses fourragères pour le développement durable des pâturages d’été en Saskatchewan Développement de matériel végétal

Affiliations :

  • Professeur auxiliaire, Université de la Saskatchewan à Saskatoon
  • Participant à la recherche invité, Atelier sur la Stratégie nationale de recherche sur le bœuf de 2016
  • Membre, American Society of Animal Science
  • Membre, Society for Range Management
  • Membre du comité, Saskatchewan Beef Industry Council

Publications de recherche

2018

  • Zhang, J., Iwaasa, A.D., Han, G., Gu, C., Wang, H., Jefferson, P.G., Kusler, J. (2018). Utilizing a multi-index decision analysis method to overall assess forage yield and quality of C3 grasses in the western Canadian prairies, 222 12-25. http://dx.doi.org/10.1016/j.fcr.2018.03.007

2017

2016

  • Kreuter, U.P., Iwaasa, A.D., Theodori, G.L., Ansley, R.J., Jackson, R.B., Fraser, L.H., Naeth, M.A., McGillivray, S., et Moya, E.G. (2016). « State of knowledge about energy development impacts on North American rangelands: An integrative approach. », Journal of Environmental Management, 180, p. 1-9. doi : 10.1016/j.jenvman.2016.05.007
  • Wang, X., McConkey, B.G., VandenBygaart, A.J., Fan, J., Iwaasa, A., Schellenberg, M., 2016. Grazing improves C and N cycling in the Northern Great Plains: A meta-analysis. Nature Scientific Reports 6.

2015

2014

2013

2012

2011

2009

Autres publications relatives à la science

2015

  • Acharya, S.N., Berg, B., et Iwaasa, A.D. (2015). « Seeding sainfoin – best practices for successful stand establishment. », Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Acharya, S.N., Berg, B., et Iwaasa, A.D. (2015). « Training the trainers for testing the new sainfoin populations for mixed pasture. », Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Alemu, A.W., Little, S.M., Hao, X., Iwaasa, A.D., Baron, V.S., Chai, L.L., Janzen, H.H., Beauchemin, K.A., Thompson, D., et Kröbel, R. (2015). « Application of life cycle assessment approach to beef production systems in the Canadian prairies with regard to environmental impact and energy use efficiency. », LCA Conference XV - A bright green future, Vancouver, Canada, October 6-8, 2015, Presentation.
  • Huang, Q.Q., Hu, T.M., Jin, L., Acharya, S.N., McAllister, T.A., Iwaasa, A.D., Mchellenberg, M., et Wang, Y. (2015). « Effects of conservation method on condensed tannin content, ruminal and intestinal digestion characteristics of purple prairie clover. », Journal of Animal Science, 93(Suppl. S3), p. 376. (Résumé)
  • Iwaasa, A.D. et coll. (2015). Best management practices for the re-introduction of sainfoin into existing alfalfa and grass pastures for western Canada. Alberta Beef Producer and Alberta Livestock and Meat Agency Ltd. research proposal. Funding was approved for this research proposal for three years ending in 2018.
  • Iwaasa, A.D., Acharya, S.N., Coulman, B., Cade-Menun, B.J., et Sottie, E.T. (2015). « Bale grazing feeding strategies and alternative forages to consider for drier grazing environments. », BC Cattlemen’s Association – Maximizing our Forage Workshop and Field Day, Bar K Ranch, Prince George, BC, Canada, October 23, 2015.
  • Iwaasa, A.D., Acharya, S.N., et Sottie, E.T. (2015). « Effect of grazing sainfoin on longevity and production: the Swift Current experiences. », Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.
  • Iwaasa, A.D., Steppuhn, H., Wall, K., Acharya, S.N., et Sottie, E.T. (2015). « Pasture renovation options for enhancing productivity on saline and semiarid grasslands. », Saskatchewan Industry Beef Conference Forage and Grazing Symposium “Growing the Future”, Queensbury Convention Centre, Evraz Place,, Regina, SK, Canada, January 21-23, 2015.
  • Klabi, R., Terrence, B., Hamel, C., Iwaasa, A.D., et St-Arnaud, M. (2015). « Effet de la légumineuse Medicago sativa sur la diversité des champginons mycorhiziens à arbuscules et les rendements fourrager et azoté dans les prairies semi-arides. », Mycorrhizae 2015, Agriculture and Agri-Food Canada, Ottawa, Canada, May 8-9, 2015, p. 10.
  • Klabi, R., Terrence, H.G., Hamel, C., Iwaasa, A.D., Schellenberg, M.P., Raies, A., et St-Arnaud, M. (2015). « Contribution of legumes ot the production of sustainable forage and plant nitrogen and to increase soil AM fungal diversity in grassland communities. », 8th International Conference on Mycorrhiza, Flagstaff, AZ, USA, August 3-7, 2015, p. 31.
  • Sottie, E.T., Iwaasa, A.D., et Acharya, S.N. (2015). « Fitting sainfoin into the grazing system. », Sainfoin Training: Improving the profitability of livestock grazing systems with sainfoin, AAFC-Lethbridge, AB, July 21-22, 2015.

2014

  • Iwaasa, A.D. et Schellenberg, M.P. (2014). « Native and tame forage research opportunities at the Semiarid Prairie Research Centre (SPARC). », 2014 Native Prairie Restoration and Reclamation Workshop, Regina, SK, Canada, January 28-30, 2014.
  • Iwaasa, A.D., Baron, V.S., Lemke, R.L., Wang, H., Kröbel, R., Schellenberg, M.P., et McConkey, B.G. (2014). « AGGP Cropping System-Grassland Research and Extension: Semiarid Ecoregion. », AGGP cropping system – grassland research and extension: Semiarid Ecoregion, AAFC-Saskatoon, Saskatoon, Canada, March 20, 2014.
  • Iwaasa, A.D., Wang, Y., Muri, R., et Schellenberg, M.P. (2014). « AAFC-SPARC Forage, grazing, ecology evaluations of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (D. candidia Michx. Ex Willd.). », 2014 Native Prairie Restoration and Reclamation Workshop, Regina, SK, Canada, January 28-30, 2014.

2013

  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., et Lardner, H.A. (2013). « The effect of in-field winter bale grazing on soil nutrients in pastures in Saskatchewan. », ASA/CSSA/SSSA International annual meeting, Tampa, Florida, USA, November 3-6, 2013.
  • Iwaasa, A.D., Li, Y., et Wang, Y. (2013). « Forage and grazing evaluations of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (Dalea candida Michx. ex Willd) at AAFC-SPARC. », Intermountain native plant summit VII, Boise State University, March 26-27, 2013.

2012

  • Badea, A., Block, H.C., Iwaasa, A.D., McLeod, G.J., et Therrien, M.C. (2012). « An innovative approach in extended swath-grazing waxy forage barley. », 7th Canadian Barley Symposium, Calgary, AB, Canada, July 8-10, 2012, p. 32. (Affiche)
  • Iwaasa, A.D. et Schellenberg, M.P. (2012). « AAFC-SPARC long term grazing and forage production on re-established native grasslands in Southern Saskatchewan. », 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012.
  • Iwaasa, A.D., Li, Y., Muri, R., Jin, Y., Schellenberg, M.P., et Biligetu, B. (2012). « Evaluation of the forage and seed characteristics of purple prairie clover (Dalea purpurea Vent.) and white prairie clover (Dalea candida Michx. Ex. Willd.). », 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012. (Affiche)
  • Iwaasa, A.D., McLeod, G.J., Schellenberg, M.P., Muri, R., et Biligetu, B. (2012). « Opportunities await for native and tame forage research at the Semiarid Prairie Agricultural Research Centre (SPARC) - Agriculture and Agri-Food Canada (AAFC). », 2012 Native Prairie Restoration/Reclamation Workshop, TCU Place, Saskatoon, SK, Canada, February 8-9, 2012. (Affiche)
  • Jin, L., Xu, Z., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., et Wang, Y. (2012). « Mixing purple prairie clover with alfalfa reduced alfalfa N transforming to ammonia-N. », ADSA-AMPA-ASAS-CSAS-WSASAS 2012 Joint Annual Meeting, Hyatt Regency, Phoenix, AZ, USA, July 15-19, 2012, W118. (Résumé)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., et Wang, Y. (2012). « Mixing purple prairie clover with alfalfa reduced alfalfa N transforming to ammonia-N. », Joint Annual Meeting, American Dairy Science Association, Poultry Science Association, American Milk Producers Association, Canadian Society of Animal Science, and American Society of Animal Science, Phoenix, Arizona, USA, July 15-19, 2012.
  • Steppuhn, H., Iwaasa, A.D., Holzer, J., Johnson, D.W., et Ulmer, M. (2012). « Increasing the salinity tolerance of alfalfa to improve the effectiveness of agronomic-hydrologic practices for controlling root-zone salinization. », 2012 ASABE Annual International Meeting, Hilton Anatole Dallas, Dallas, TX, USA, July 29-August 1, 2012, Paper Number: 12-1338231, p. 3306-3322.

2011

  • Acharya, S.N., Iwaasa, A.D., Coulman, B., Jefferson, P.G., McAllister, T.A., et Wang, Y. (2011). « New sainfoin keeps pace with alfalfa for safe grazing. », Plant Canada 2011, Saint Mary’s University, Halifax, NS, Canada, July 17-21, 2011.
  • Acharya, S.N., Iwaasa, A.D., Coulman, B., Wang, Y., et Berg, B. (2011 Internal). Advancing the development of bloat-safe alfalfa grazing through the development and establishment of improved sainfoin germplasm. BCRC 2010-2011 Annual Performance Report., AAFC Lethbridge Research Centre, AB. (Rapport)
  • Acharya, S.N., Iwaasa, A.D., McAllister, T.A., Wang, Y., et Thomas, J. (2011). « Animal performance and incidence of bloat in mixed alfalfa/sainfoin grazing. », Plant Canada 2011, Saint Mary’s University, Halifax, NS, Canada, July 17-21, 2011.
  • Baron, V.S., Lemke, R.L., Basarab, J.A., et Iwaasa, A.D. (2011). « Root, residue and removal-C and –N pools compared to above ground production for forage-based management practices. », 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011, Abstract 67442. (Résumé)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., et Lardner, H.A. (2011). « Cattle winter bale-grazing in SW Saskatchewan: the SPARC research project. », Extensive cattle wintering systems workshop, Saskatoon, SK, Canada, February 8-9, 2011. (Atelier)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., et Lardner, H.A. (2011). « Nutrient loss in snowmelt runoff from cattle winter bale-grazing in SW Saskatchewan. », 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011.
  • Iwaasa, A.D. (2011). « Pastue management and productivity. », Canadian Cattleman Association Action News.
  • Iwaasa, A.D. (2011). « Purple prairie clover may reduce E. coli in cattle. », Western Producer.
  • Iwaasa, A.D. (2011). « Sainfoin. », Saskatchewan Stock Growers Association (SSGA) magezine.
  • Iwaasa, A.D., Acharya, S.N., McAllister, T.A., McLeod, G.J., Coulman, B., et Jefferson, P.G. (2011 Internal). Evaluating new sainfoin germplasm/alfalfa mixtures to achieve bloat-safe grazing. Proj. ID.1151 Annual Research Project Progress Report., AAFC Semiarid Prairie Agricultural Research Centre, Swift Current, SK. (Rapport)
  • Iwaasa, A.D., Feist, M., Christensen, D.A., Doig, B., Peiqiang, Y., et Benot, A. (2011). « 2011 Saskatchewan Advisory Council on Forage Crop: Feed and Forage Quality Sub-Committee Report. », SACFC Annual Meeting, Saskatoon, SK, Canada, December 12, 2011, 11 pages. (Présentation)
  • Iwaasa, A.D., Steppuhn, H., Schellenberg, M.P., Acharya, S.N., et Wang, Y. (2011). « A forage and grazing research update. », SWFA Annual General Meeting, Swift Current, SK, Canada, March 1, 2011.
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Schellenberg, M.P., Zhang, Y.G., McAllister, T.A., et Wang, Y. (2011). « Nutrient and tannin contents of purple prairie clover (Petalostemon purpureum) harvested at different growth stages. », Journal of Animal Science, 89(E-Suppl. 1), p. 48. (Résumé)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., et Wang, Y. (2011). « Effect of tannins on in vitro ruminal degradability of purple prairie clover (Petalostemon purpureum) harvested at two growth stages in the DaisyII Fermentation System. », Journal of Animal Science, 89(E-Suppl. 1), p. 387. (Résumé)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., et Wang, Y. (2011). « Effect of tannins on in vitro ruminal degradability of purple prairie clover (Petalostemon purpureum) harvested at two growth stages in the DaisyII Fermentation System. », ADSA-PSA-AMPA-CSAS-ASAS 2011 Joint Annual Meeting, New Orleans, LA, USA, July 11-14, 2011, T356. (Affiche)
  • Jin, L., Xu, Z.J., Iwaasa, A.D., Zhang, Y.G., Schellenberg, M.P., McAllister, T.A., et Wang, Y. (2011). « Nutrient and tannin contents of purple prairie clover (Petalostemon purpureum) harvested at different growth stages. », ADSA-PSA-AMPA-CSAS-ASAS 2011 Joint Annual Meeting, New Orleans, LA, USA, July 11-14, 2011, M#127. (Affiche)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., et Wang, Y. (2011). « Effect of incorporation of purple prairie clover (Petalostemon purpureum) into cool season grasses mixture on in vitro ruminal fermentation. », 60th Annual Meeting of the Canadian Society of Animal Science (CSAS), Atlantica Hotel, Halifax, NS, Canada, May 4-5, 2011, FPE-3. (Affiche)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., et Wang, Y. (2011). « Effect of incorporation of purple prairie clover (Petalostemon purpureum) into cool season grasses mixture on in vitro ruminal fermentation. », Canadian Journal of Animal Science, 91(3), p. 476. (Résumé)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., et Wang, Y. (2011). « Fecal shedding of Escherichia coli of cattle grazing pastures with and without purple prairie clover (Petalostemon purpureum). », 60th Annual Meeting of the Canadian Society of Animal Science (CSAS), Atlantica Hotel, Halifax, NS, Canada, May 4-5, 2011, TDC-2. (Affiche)
  • Jin, L., Zhang, Y.G., Iwaasa, A.D., Schellenberg, M.P., Xu, Z.J., McAllister, T.A., et Wang, Y. (2011). « Fecal shedding of Escherichia coli of cattle grazing pastures with and without purple prairie clover (Petalostemon purpureum). », Canadian Journal of Animal Science, 91(3), p. 503. (Résumé)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., et Schoenau, J.J. (2011 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report prepared for Greenhouse Gas Division, Science and Technology Branch, Environment Canada., Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Rapport)
  • Lemke, R.L., Iwaasa, A.D., Baron, V.S., Farrell, R.E., et Schoenau, J.J. (2011). « Quantifying nitrous oxide emissions resulting from beef cattle urine and dung on semiarid pasture. », 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011.
  • Lennox, T., Iwaasa, A.D., et Jensen, R. (2011 Internal). Demonstration of new sainfoin varieties under grazing. Agricultural Demonstration of Practices and Technologies (ADOPT) Final Report. (Rapport)
  • Schellenberg, J.J., Biligetu, B., et Iwaasa, A.D. (2011). « Botanical composition change of seeded simple and complex native forage mixtures following grazing. », IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, p. 393.
  • Schellenberg, M.P., Biligetu, B., et Iwaasa, A.D. (2011). « Botanical composition of seeded simple and complex native forage mixtures following grazing. », IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, p. 393.
  • Schellenberg, M.P., Biligetu, B., et Iwaasa, A.D. (2011). « Effects of grazing disturbance on re-established native forage stands for a semiarid climate. », IX International Rangeland Congress - IRC2011: Diverse Rangelands for a Sustainable Society, Rosario, Argentina, April 2-8, 2011, p. 179.

2010

  • Iwaasa, A.D., Buckley, K.E., Baron, V.S., Wang, H., McConkey, B.G., et les autres (2010 Internal). Grassland/beef management impacts on greenhouse gas and ammonia emissions in prairie ecosystems. Annual Research Project Progress Report., Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Rapport)
  • Klabi, R., Hamel, C., Iwaasa, A.D., et Raies, A. (2010). « Nitrogen Fixation and Isotope Composition of Native and Tame Forage Plants. », Soils and Crops Workshop 2010, University of Saskatchewan, Saskatoon, SK, Canada, February 24-25, 2010.
  • Meale, S.J., Chaves, A.V., Schei, I., McAllister, T.A., Iwaasa, A.D., Yang, W.-Z., et Benchaar, C. (2010). « Including essential oils in ruminal batch cultures, or in diets fed to lactating dairy cows: effects on methane emissions. », 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff Park Lodge, Banff, AB, Canada, October 3-8, 2010, # T84, p. 107. (Affiche)
  • Meale, S.J., Chaves, A.V., Schei, I., McAllister, T.A., Iwaasa, A.D., Yang, W.-Z., et Benchaar, C. (2010). « Including essential oils in ruminant batch cultures or in diets fed to lactating dairy cows: Effects on methane emissions. », dans McGeough, E.G. and McGinn, S.M. (dir.) - Proceedings of the 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff, AB, Canada, October 3-8, 2010, p. 136.
  • Patel, M., Danielsson, R., Börjesson, G., Iwaasa, A.D., Spörndly, E., Wredle, E., et Bertilsson, J. (2010). « Enteric methane emissions from dairy cows fed different proportions of highly digestible grass silage. », 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff Park Lodge, Banff, AB, Canada, October 3-8, 2010.

2009

  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., Naeth, M.A., et Iwaasa, A.D. (2009). « Pasture type and site effects on annual nitrous oxide emission rate. », 62nd Society for Range Management Annual Meeting, Albuquerque Convention Center, Albuquerque, NM, USA, February 8-12, 2009, Paper No. 100-4. (Résumé)
  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., et Iwaasa, A.D. (2009). « Nitrous oxide emission from old and new pastures. », 2009 ASA-CSSA-SSSA International Annual Meeting, Pittsburgh, PA, USA, November 1-5, 2009. (Résumé)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., et Lardner, B. (2009). « Nutrient concentrations and forms in runoff from cattle winter bale-grazing sites. », Great Lakes Phosphorus Forum with SERA-17 Annual Meeting, Hilton Hotel and St. Clair Centre, Windsor, ON, Canada, July 28-31, 2009. (Affiche)
  • Cade-Menun, B.J., McConkey, B.G., Iwaasa, A.D., et Lardner, B. (2009). « Nutrient concentrations and forms in runoff from cattle winter bale-grazing sites. », Joint Annual Meeting of the CSA-CSSS-CSAFM, University of Guelph, Guelph, ON, Canada, August 5-7, 2009. (Présentation)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., et Schoneau, J.J. (2009 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report for Environment Canada. (Rapport)
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