Nitrogen footprints: Regional realities and options to reduce nitrogen loss to the environment
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Nitrogen (N) management presents a sustainability dilemma: N is strongly linked to energy and food production, but excess reactive N causes environmental pollution. The N footprint is an indicator that quantifies reactive N losses to the environment from consumption and production of food and the use of energy. The average per capita N footprint (calculated using the N-Calculator methodology) of ten countries varies from 15 to 47 kg N capita−1 year−1. The major cause of the difference is the protein consumption rates and food production N losses. The food sector dominates all countries’ N footprints. Global connections via trade significantly affect the N footprint in countries that rely on imported foods and feeds. The authors present N footprint reduction strategies (e.g., improve N use efficiency, increase N recycling, reduce food waste, shift dietary choices) and identify knowledge gaps (e.g., the N footprint from nonfood goods and soil N process).
KeywordsNitrogen cycle Nitrogen effects Nitrogen footprint Nitrogen use efficiency
We would like to thank all participants of the International Nitrogen Footprint Workshop held in Hokkaido University, Sapporo, Japan in March 16-18th, 2015 for helping to develop this manuscript. We also would like to thank the funding support for the workshop from The KAITEKI Institute Inc., Japan; Green Network of Excellence - Environmental information (funded by Ministry of Education, Culture, Sports, Science and Technology, Japan); National Institute for Agro-Environmental Sciences, Japan; National Institute for Environmental Studies, Japan; Ministry of Education, Taiwan; National Dong Hwa University, Taiwan; Advanced Research and Education Center for Steel (ARECS), Tohoku University, Japan. This research was also partly supported by Science and technology research promotion program for agriculture, forestry, fisheries and food industry; Environment Research and Technology Development Fund (S-15) of the Ministry of the Environment, Japan. This is a contribution to the N-PRINT project (www.n-print.org), the www.dNmark.org research alliance, and to the International Nitrogen Initiative (www.initrogen.org).
- Bleeker, A., M. Sutton, W. Winiwater, and A. Leip. 2012. Economy-wide nitrogen balances and indicators: Concept and methodology. ENV/EPOC/WPEI 4: 3–22.Google Scholar
- Emerson, J.W., A. Hsu, M.A. Levy, A. de Sherbinin, V. Mara, D.C. Esty, and M. Jaiteh. 2012. 2012 Environmental Performance Index and Pilot Trend Environmental Performance Index. New Haven: Yale Center for Environmental Law and Policy.Google Scholar
- Freney, J.R. 2011. Management practices to increase efficiency of fertilizer and animal nitrogen and minimize nitrogen loss to the atmosphere and groundwater. In Proceedings of the International Seminar on Increased Agricultural Nitrogen Circulation in Asia: Technological Challenge to Mitigate Agricultural N Emissions. Taipei, Taiwan.Google Scholar
- Galloway, J.N., J.D. Aber, J.W. Erisman, S.P. Seitzinger, R.W. Howarth, E.B. Cowling, and B.J. Cosby. 2003. The nitrogen cascade. BioScience 53: 341–356.Google Scholar
- Galloway, J.N., A.R. Townsend, J.W. Erisman, M. Bekunda, Z. Cai, J.R. Freney, L.A. Martinelli, S.P. Seitzinger, et al. 2008. Transformation of the nitrogen cycle: Recent trends, questions, and potential solutions. Science 320: 889–892.Google Scholar
- Geoscience Australia and BREE. 2014. Australian Energy Resource Assessment, 2nd ed. Canberra: Geoscience Australia.Google Scholar
- Giller, K.E., P. Chalk, A. Dobermann, L. Hammond, P. Heffer, J.K. Ladha, P. Nyamudeza, L. Maene, et al. 2004. Emerging technologies to increase the efficiency of use of fertilizer nitrogen. In Agriculture and the nitrogen cycle: Assessing the impacts of fertilizer use on food production and the environment, ed. A.R. Mosier, J.K. Syers, and J.R. Freney, 35–51. Washington, DC: Island Press.Google Scholar
- Graversgaard M., T. Dalgaard, A.M. Leach, L.R. Cattaneo, and J.N. Galloway. 2016. The Danish nitrogen footprint: Applying nitrogen footprints to build awareness about protein consumption and using policy scenarios to change behavior. In Proceedings of the 7th International Nitrogen Initiative Conference, Submitted.Google Scholar
- Gu, B., J. Chang, Y. Min, Y. Ge, Q. Zhu, J.N. Galloway, and C. Peng. 2013b. The role of industrial nitrogen in the global nitrogen biogeochemical cycle. Scientific Reports 3: 2579.Google Scholar
- Gustavsson, J., C. Cederberg, and U. Sonesson. 2011. Global food losses and food waste: Extent, causes and prevention. Study conducted for the International Congress SAVE FOOD! At Interpack2011, Düsseldorf/Germany. FAO, Rome. www.fao.org/docrep/014/mb060e/mb060e00.pdf.
- Ma, L., F. Wang, W. Zhang, W. Ma, G. Velthof, W. Qin, O. Oenema, and F. Zhang. 2013. Environmental assessment of management options for nutrient flows in the food chain in China. Environmental Science and Technology 47: 7260–7268.Google Scholar
- OECD. 2008. Environmental Performance of Agriculture in OECD Countries since 1990. ISBN 978-92-64-04092-2.Google Scholar
- Oenema, O. 2004. Governmental policies and measures regulating nitrogen and phosphorus from animal manure in European agriculture. Journal of Animal Science 82: 196–206.Google Scholar
- Origin. 2015. Coal in Australia. Origin Energy, Australia, Retrieved 22 July 2016, from https://www.originenergy.com.au/blog/about-energy/coal-in-australia.html.
- Sutton, M.A., A. Bleeker, C.M. Howard, J.W. Erisman, Y.P. Abrol, M. Bekunda, A. Datta, E. Davidson, et al. 2013. Our Nutrient World: The challenge to produce more food and energy with less pollution. Centre for Ecology and Hydrology, Edinburgh on behalf of the Global Partnership on Nutrient Management and the International Nitrogen Initiative.Google Scholar
- Takemasa, M. 1998. Nutritional strategies to reduce nutrient waste in livestock and poultry production. Chemistry & Biology 36: 720–726 (in Japanese).Google Scholar
- Tilman, D., and M. Clark. 2015. Food, agriculture & the environment: Can we feed the world & save the earth? Dædalus 144: 8–23.Google Scholar
- van Grinsven, H.J.M., H.F.M. Ten Berge, T. Dalgaard, B. Fraters, P. Durand, A. Hart, G. Hofman, B.H. Jacobsen, et al. 2012. Management, regulation and environmental impacts of nitrogen fertilization in northwestern Europe under the Nitrates Directive: A benchmark study. Biogeosciences 9: 5143–5160.Google Scholar
- Westhoek H., J.P. Lesschen, A. Leip, T. Rood, S. Wagner, A. De Marco, D. Murphy-Bokern, C. Pallière, et al. 2015. Nitrogen on the table: The influence of food choices on nitrogen emissions and the European environment. (European Nitrogen Assessment Special Report on Nitrogen and Food.). Centre for Ecology and Hydrology, Edinburgh, UK.Google Scholar
- World Nuclear Association. 2015. Australia’s Electricity. Retrieved 22 July, 2016, from http://www.world-nuclear.org/information-library/country-profiles/countries-a-f/appendices/australia-s-electricity.aspx.