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Janzen, Henry, Ph.D.

Chercheur scientifique

Coordonnées :

5403 - 1 Avenue South
C.P. 3000
Lethbridge, (Alberta) T1J 4B1
Téléphone : 403-317-2223
Télécopieur : 403-382-3156
Courriel : henry.janzen@agr.gc.ca

Domaines d'expertise :

  • cycles du carbone, de l'azote et du soufre
  • émissions de gaz à effet de serre et mesures d'atténuation
  • piégeage du carbone dans les sols

Projets en cours :

  • Effets de gestion sur le carbone dans les sols agricoles
  • Quantification et réduction des émissions nettes de gaz à effet de serre des écosystèmes agricoles
  • éléments d'interaction des agroécosystèmes et du cycle planétaire du carbone
  • échanges azotés entre les agroécosystèmes et l'atmosphère
  • Tendances à long terme de la productivité et autres services écosystémiques des terres agricoles

Affiliations :

  • Professeur auxiliaire, Université du Manitoba

Publications de recherche

2018

  • Fan, J., McConkey, B.G., Janzen, H.H., Miller, P.R. (2018). Emergy and energy analysis as an integrative indicator of sustainability: A case study in semi-arid Canadian farmlands, 172 428-437. http://dx.doi.org/10.1016/j.jclepro.2017.10.200
  • Fan, J., McConkey, B.G., Liang, B.C., Angers, D.A., Janzen, H.H., Kröbel, R., Cerkowniak, D.D., Smith, W.N. (2019). Increasing crop yields and root input make Canadian farmland a large carbon sink, 336 49-58. http://dx.doi.org/10.1016/j.geoderma.2018.08.004
  • Smith, E.G., Janzen, H.H., Ellert, B.H. (2018). Soil organic carbon changes as influenced by carbon inputs and previous cropping system, 98(3), 566-569. http://dx.doi.org/10.1139/cjss-2017-0120
  • Thiagarajan, A., Fan, J., McConkey, B.G., Janzen, H.H., Campbell, C.A. (2018). Dry matter partitioning and residue N content for 11 major field crops in Canada adjusted for rooting depth and yield, 98(3), 574-579. http://dx.doi.org/10.1139/cjss-2017-0144

2017

  • Gregorich, E.G., Janzen, H.H., Ellert, B.H., Helgason, B.L., Qian, B., Zebarth, B.J., Angers, D.A., Beyaert, R.P., Drury, C.F., Duguid, S., May, W.E., McConkey, B.G., Dyck, M.F. 2017. Litter decay controlled by temperature, not soil properties, affecting future soil carbon. Global Change Biology (in press). doi: 10.1111/gcb.13502
  • Smith, E.G., Janzen, H.H., Ellert, B.H. (2017). Effect of fertilizer and cropping system on grain nutrient concentrations in spring wheat, 98(1), 125-131. http://dx.doi.org/10.1139/cjps-2017-0079

2016

  • Chai, L.L., Kröbel, R., Macdonald, D.J., Bittman, S., Beauchemin, K.A., Janzen, H.H., McGinn, S.M., et VanderZaag, A.C. (2016). « An ecoregion-specific ammonia emissions inventory of Ontario dairy farming: Mitigation potential of diet and manure management practices. », Atmospheric Environment, 126, p. 1-14. doi : 10.1016/j.atmosenv.2015.11.030
  • Diochon, A., Gillespie, A.W., Ellert, B.H., Janzen, H.H., et Gregorich, E.G. (2016). « Recovery and dynamics of decomposing plant residue in soil: an evaluation of three fractionation methods based on size and density. », European Journal of Soil Science. doi : 10.1111/ejss.12316
  • Fan, J., McConkey, B.G., Wang, H., et Janzen, H.H. (2016). « Root distribution by depth for temperate agricultural crops. », Field Crops Research, 189, p. 68-74. doi : 10.1016/j.fcr.2016.02.013
  • J. Guyader, H. H. Janzen, R. Kroebel, K. A. Beauchemin, Forage use to improve environmental sustainability of ruminant production, Journal of Animal Science, Volume 94, Issue 8, August 2016, Pages 3147–3158, https://doi.org/10.2527/jas.2015-0141
  • Kröbel, R., Bolinder, M.A., Janzen, H.H., Little, S.M., VandenBygaart, A.J., et Kätterer, T. (2016). « Canadian farm-level soil carbon change assessment by merging the greenhouse gas model Holos with the Introductory Carbon Balance Model (ICBM). », Agricultural Systems, 143, p. 76-85. doi : 10.1016/j.agsy.2015.12.010
  • Larney, F.J., Li, L., Janzen, H.H., Angers, D.A. and Olson, B.M. 2016. Soil quality attributes, soil resilience and legacy effects following topsoil removal and one-time amendments. Can. J. Soil Sci. 96: 177–190.
  • Le Roy, D.G., Smith, E.G., MacCallum, P.J., Janzen, H.H. (2017). Will summer fallow re-emerge in the dark brown soil zone of the Canadian prairie as a response to net return risk?, 97(2), 214-249. http://dx.doi.org/10.1139/cjps-2016-0053
  • Smith, E.G., Janzen, H.H., Scherloski, L., Larney, F.J., Ellert, B.H. (2016). Long-term (47 yr) effects of tillage and frequency of summerfallow on soil organic carbon in a Dark Brown Chernozem soil in western Canada, 96(4), 347-350. http://dx.doi.org/10.1139/cjss-2015-0120
  • Yanni, S.F., Janzen, H.H., Gregorich, E.G., Ellert, B.H., Larney, F.J., Olson, B.M., Zvomuya, F. (2016). Organic carbon convergence in diverse soils toward steady state: A 21-year field bioassay, 80(6), 1653-1662. http://dx.doi.org/10.2136/sssaj2016.07.0214

2015

2014

2013

2012

2011

2010

2009

Autres publications relatives à la science

2016

  • McGinn, S.M., Janzen, H.H., Coates, T.W., Beauchemin, K.A., et Flesch, T.K. (2016). « Ammonia emission from a beef cattle feedlot and its local dry deposition and re-emission. », GGAA Conference, Melbourne, Australia, February 14-18, 2016.

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.
  • Chai, L.L., Kröbel, R., Beauchemin, K.A., Macdonald, D.J., Janzen, H.H., McGinn, S.M., et Bittman, S. (2015). « Greenhouse gases and ammonia emissions from grazing beef cattle in Alberta and Ontario Canada. », Canadian Society for Bioengineering Conference/CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, Canada, July 5-8, 2015, Presentation.
  • Chai, L.L., Kröbel, R., MacDonald, D., Bittman, S., Janzen, H.H., Beauchemin, K.A., McGinn, S.M., Little, S.M., et Martel, M. (2015). « Ammonia and nitrous oxide emission factors of land applied cattle manure in Alberta and Ontario », Conference of Soil Interfaces for Sustainable Development, Montreal, Quebec, Canada. (Résumé)
  • Chai, L.L., Kröbel, R., Macdonald, D.J., Bittman, S., Beauchemin, K.A., Janzen, H.H., et McGinn, S.M. (2015). « Developing nitrogen loss fractions for beef and dairy cattle manure storage systems in Canadian ecoregions: a comparison between West and East. », Canadian Society for Bioengineering Conference/CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, Canada, July 5-8, 2015.
  • Diochon, A., Gregorich, E.G., Ellert, B.H., Janzen, H.H., et Helgason, B.L. (2015). « The role of temperature and soil texture in decomposition: findings from a physical fractionation study. », Canadian Society of Soil Science Annual Conference, Montreal, QC, Canada, July 2015.
  • Helgason, B.L., Kuzmicz, S.C., Janzen, H.H., Gillespie, A.W., Hemmingsen, S.M., Yergeau, E., Greer, C.W., Germida, J.J., et Leinweber, P. (2015). « Historical Rotation ABC: changes in microbial community dynamics over 100 years of wheat production. », Canadian Society of Soil Science Annual Conference, Montreal, QC, Canada.
  • Kröbel, R., Janzen, H.H., Ellert, B.H., Beauchemin, K.A., et McAllister, T.A. (2015). « Agriculture is neither the culprit nor the solution to Climate Change. », “Our Common Future under Climate Change” Conference, Paris, France, July 7-10, 2015. (Affiche)
  • Kröbel, R., Li, S., Little, S.M., Vanin, C., et Janzen, H.H. (2015). « Calculating greenhouse gases from the Black-Brook watershed, New Brunswick, using the Holos model. », Conference “On Sustainability 2015”, Copenhagen, Denmark.
  • Little, S.M., Beauchemin, K.A., Benchaar, C., Chai, L.L., Janzen, H.H., Kröbel, R., McGeough, E.J., et VanderZaag, A.C. (2015). « Demonstrating the effect of diet on the carbon footprint of a Canadian dairy scenario using whole-systems analysis and the Holos model: corn silage vs. alfalfa silage. », LCA Conference XV - A bright green future, Vancouver, Canada, October 6-8, 2015, Presentation.
  • Martel, M., Kröbel, R., Hrapovic, L., Janzen, H.H., McConkey, B.G., Glenn, A.J., et Wilson, H.F. (2015). « A Canadian water budget model for water footprint assessment of crop production. », Canadian Soil Science Society (IUSS-CSSS-AQSSS) Conference, Montreal, QC, Canada, July 5-10, 2015. (Affiche)

2014

  • Desjardins, R.L., Worth, D.E., Vergé, X.P.C., VanderZaag, A.C., Kröbel, R., Janzen, H.H., Maxime, D., et Dyer, J.A. (2014). « The carbon footprint of agricultural products: A measure of the impact of agricultural production on climate change. », International Conference on Promoting Weather and Climate Information for Agriculture and Food Security, Antalya, Turkey, April 7-9, 2014.
  • Ellert, B.H., Helgason, B.L., Janzen, H.H., et Gregorich, E.G. (2014). « Soil Disturbance Effects on Plant Residue Decay in Canadian Agricultural Soils. », Canadian Society of Soil Science Annual Meetings, Banff, AB, Canada, May 2014.
  • Gillespie, A.W., Sanei, H., Diochon, A., Tarnocai, C., Janzen, H.H., Regier, T.Z., Chevrier, D., Dynes, J.J., et Gregorich, E.G. (2014). « Biological stability of soil organic matter is related to thermal and chemical properties. », Complex Soil Systems SSSA/Bouyoucos Funds, Berkeley Lab, DOE, Berkeley, CA, USA, September 3-5, 2014.
  • Gillespie, A.W., Sanei, H., Diochon, A., Tarnocai, C., Janzen, H.H., Regier, T.Z., et Gregorich, E.G. (2014). « Using thermal and spectroscopic (XANES) indices to understand the biological stability of soil organic matter. », American Geophysical Union (AGU) Fall Meeting, San Fransisco, CA, USA, December 15-19, 2014.
  • Gregorich, E.G., Ellert, B.H., Helgason, B.L., et Janzen, H.H. (2014). « Soil disturbance effects on decomposition of plant residues in Canadian agricultural soils. », 20th World Congress of Soil Science, Jeju, South Korea, June, 2014, Presentation.
  • Gregorich, E.G., Ellert, B.H., Janzen, H.H., et Helgason, B.L. (2014). « Plant residue decay in diverse Canadian Soils. », American Society of Agronomy Annual Meetings, Long Beach, CA, USA, November 2014, Presentation.
  • Gregorich, E.G., Ellert, B.H., Janzen, H.H., et Helgason, B.L. (2014). « Plant residue decay in diverse Canadian soils. », 20th World Congress of Soil Science, Jeju, South Korea, June 8-13, 2014, Presentation.
  • Helgason, B.L., Kuzmicz, S.C., Janzen, H.H., Gillespie, A.W., Hemmingsen, S.M., Yergeau, E., Greer, C.W., Germida, J.J., et Leinweber, P. (2014). « Historical Rotation ABC: microbial community structure and diversity over 100 years of wheat production. », 1st global Soil Biodiversity Conference, Dijon, France, December 2014, Presentation.
  • Smith, E.G. et Janzen, H.H. (2014). « The value of soil quality indices in crop production for western Canada. », 2014 Canadian Economics Association and the Canadian Agricultural Economics Society annual joint meeting, Simon Fraser University, Vancouver, BC, Canada, May 29 - June 1, 2014.

2013

  • Chai, L.L., Kröbel, R., Janzen, H.H., Beauchemin, K.A., McGinn, S.M., Bittman, S., Atia, A., et Edeogu, I. (2013). « A mass balance model based on total ammoniacal nitrogen for estimating ammonia volatilization from beef cattle manure management in Alberta in Canada. », ASABE Annual International Meeting, Kansas City, MO, USA, July 21-24, 2013, paper #:1596572.
  • Ellert, B.H., Gregorich, E.G., et Janzen, H.H. (2013). « Measuring and Monitoring Soil Carbon Storage. », ASA/CSSA/SSSA International annual meeting, Tampa, Florida, USA, November 3-6, 2013, Oral presentation.
  • Flaten, D.N., Janzen, H.H., Ominski, K.H., et Taylor, A.A. (2013). « Video-conferencing to deliver a graduate course on agricultural sustainability. », Joint annual meetings of the Canadian Society of Soil Science, Manitoba Soil Science Society, and Canadian Society of Agricultural and Forest Meteorology, Fort Garry Hotel, Winnipeg, MB, Canada, July 22-25, 2013, Oral presentation.
  • Janzen, H.H. (2013). « Agricultural sustainability: some thoughts from a Canadian (science) perspective. », T2013 Tetrapartite meetings, Norwich, UK, June 2-5, 2013.
  • Janzen, H.H. (2013). « Earth’s malleable membrane. », Joint Annual Meetings of the Canadian Society of Soil Science, Manitoba Soil Science Society, Canadian Society of Agricultural and Forest Meteorology, Winnipeg, MB, Canada, July 22-25, 2013, Oral presentation.
  • Janzen, H.H. (2013). « Managing soil carbon for manifold benefits. », STAP/GEF Special Session, Washington DC, USA, October 10, 2013, Oral presentation.
  • Kröbel, R., Janzen, H.H., Little, S.M., et Li, S. (2013). « Preliminary Holos model assessment of GHG emissions from crop production in the Black-Brook watershed, NB, during the years 1988 – 1997. », CSSS/MSSS/CSAFM 2013 Annual Meeting, Winnipeg, MB., Canada, June 22-25, 2013.
  • Li, L., Janzen, H.H., Larney, F.J., et Angers, D.A. (2013). « Long-term recovery of soil organic matter and aggregate stability in an artificially eroded soil under various one- time amendments. », Joint Annual Meetings of the Canadian Society of Soil Science, Manitoba Soil Science Society, Canadian Society of Agricultural and Forest Meteorology, Winnipeg, MB, Canada, July 22-25, 2013. (Affiche)
  • Little, S.M., Beauchemin, K.A., Janzen, H.H., Kröbel, R., et Maclean, K. (2013). « Holos - Methodology & Algorithms for Version 2.0. », AAFC Lethbridge, Lethbridge, AB, March 21, 2013. (Présentation)
  • McGeough, E.J., Little, S.M., Janzen, H.H., McAllister, T.A., McGinn, S.M., et Beauchemin, K.A. (2013). « Greenhouse gas emissions from dairying in Eastern Canada – Effects of varying dairy cow replacement rate. », CSAS-CMSA Joint Annual Meeting, Banff Park Lodge Resort Hotel and Conference Centre, Banff, AB, Canada, June 18-20, 2013, P42, p. 42. (Affiche)

2012

  • McGeough, E.J., Little, S.M., Janzen, H.H., McAllister, T.A., McGinn, S.M., et Beauchemin, K.A. (2012). « Life-cycle assessment of greenhouse gas emissions from dairy production in Eastern Canada: A case study. », Symposium on "Agriculture and greenhouse gases", Oslo, Norway, November 5-6, 2012, Oral Presentation.

2011

  • Beauchemin, K.A., McGeough, E.J., Little, S.M., Janzen, H.H., McAllister, T.A., McGinn, S.M., et Maclean, K. (2011). « GHG modelling activities: an overview. », Seminar on Greenhouse Gases from Agriculture, Norwegian University of Life Sciences, Norway, June 29, 2011. (Présentation)
  • Beauchemin, K.A., McGeough, E.J., Little, S.M., Janzen, H.H., McAllister, T.A., McGinn, S.M., et Maclean, K. (2011). « The Holos Model: reflections on progress and future plans. », Norway, June 2011. (Présentation)
  • Beauchemin, K.A., McGeough, E.J., et Janzen, H.H. (2011). « Life cycle assessment - A holistic approach to assessing greenhouse gas emissions from beef and dairy production. », 1st Joint meeting of the American Society of Animal Science and the Association Argentina de Production Animal, Mar del Plata, Argentina, October 4-7, 2011. (Présentation)
  • Dai, M., Hamel, C., St. Arnaud, M., Grant, C.A., Lupwayi, N.Z., Janzen, H.H., Yang, X.Q., et Zhou, Z. (2011). « Composition and diversity of arbuscular mycorrhizal fungi in cropping system associated with different soil zones using pyrosequencing. », Soils Ecology Society Meeting 2011, University of British Columbia - Okanagan, Kelowna, BC, Canada, May 24-27, 2011, p. 43.
  • DePauw, R.M., Malhi, S.S., Bullock, P.R., Gan, Y.T., McKenzie, R.H., Larney, F.J., Janzen, H.H., Cutforth, H.W., et Wang, H. (2011). « Wheat Production in Northern High Latitudes – Canadian example. », dans Bonjean, A., Angus, W., and Van Ginkel, M. (dir.) - The World Wheat Book A History of Wheat Breeding. Vol. 2, Lavoisier Tech et Doc, Paris, France, p. 607-651.
  • Janzen, H.H. (2011). « After 100 years, what is left to learn? », Lethbridge Historical Plots Centennial Workshop, Lethbridge, AB, Canada, June 21-22, 2011. (Présentation)
  • Janzen, H.H. (2011). « Changes in cropping and tillage practices in Alberta: A recent revolution. », No-till and Crop Diversification as Base for Soil Conservation and Achieving National Food Security, Shortandy, Kazakhstan, July 23-24, 2011, p. 78-84.
  • Janzen, H.H. (2011). « Listening to the land, from one century to the next. », Dr. Alex Johnston Lecture,, Galt Museum, Lethbridge, AB, Canada, November 10, 2011. (Présentation)
  • Janzen, H.H. (2011). « Trial plots have stories to tell. », Western Producer, September 22, 2011, p. 18-19.
  • Janzen, H.H. et Ellert, B.H. (2011). « Rotations ABC and U: A centennial tribute. », Lethbridge Historical Plots Centennial Workshop, Lethbridge, AB, Canada, June 21-22, 2011. (Présentation)
  • Larney, F.J. et Janzen, H.H. (2011). « Use of manure for restoring soil productivity. », Manure Management Update 2011, Lethbridge, AB, Canada, January 17, 2011, p. 9-16.
  • Larney, F.J., Willms, W.D., Smith, E.G., Janzen, H.H., Ellert, B.H., et Miller, J.J. (2011). « Other long-term experiments at Lethbridge Research Centre. », Historical Rotations Workshop, Lethbridge, AB, Canada, June 21-22, 2011. (Présentation)

2010

  • Beauchemin, K.A., Janzen, H.H., Little, S.M., McAllister, T.A., et McGinn, S.M. (2010). « Mitigation of greenhouse gas emissions from beef production in Canada – an evaluation using Holos-R life cycle analysis. », 4th International Greenhouse Gases and Animal Agriculture Conference (GGAA), Banff Park Lodge, Banff, AB, Canada, October 3-8, 2010. (Résumé)

2009

  • Benke, M.B., Hao, X., Janzen, H.H., McAllister, T.A., Caffyn, P.R., et Schoenau, J.J. (2009). « Effect of DDGS manure on soil and plant: Preliminary results of the greenhouse study. », Soils and Crops Workshop 2009, Western College of Veterinary Medicine, Saskatoon, SK, Canada, February 25-26, 2009. (Atelier)
  • Hao, X., Benke, M.B., Caffyn, P.R., Janzen, H.H., Schoenau, J.J., et McAllister, T.A. (2009). « Using manure from cattle fed dried distillers’ grains with solubles (DDGS) as fertilizer: Effects on nutrient accumulation in soil and uptake by barley forage. », 2009 ASA-CSSA-SSSA International Annual Meeting, Pittsburgh, PA, USA, November 1-5, 2009. (Affiche)
  • Janzen, H.H. (2009). « A century of planting trees: Musings on one hundred years of research. Guest Essay. », Canadian Journal of Soil Science, 89(3), p. 247-254.
  • Little, S.M., Lindeman, J., Maclean, K., et Janzen, H.H. (2009). « Holos - logiciel des emissions de GES de la ferme. », publié par AAC Centre de recherche et de développement en horticulture, Saint-Jean-sur-Richelieu, QC, 2 pages. (Document d'information)
  • Little, S.M., Lindeman, J., Maclean, K., et Janzen, H.H. (2009). Holos - un outil pour estimer et réduire les GES émis par les fermes., Canada: Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Manuel)
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