Measurement of Net Global Warming Potential in Three Agroecosystems Article DOI:
Cite this article as: Mosier, A., Halvorson, A., Peterson, G. et al. Nutr Cycl Agroecosyst (2005) 72: 67. doi:10.1007/s10705-004-7356-0 Abstract
When appraising the impact of food and fiber production systems on the composition of the Earth's atmosphere and the ‘greenhouse’ effect, the entire suite of biogenic greenhouse gases – carbon dioxide (CO
2), methane (CH 4), and nitrous oxide (N 2O) – needs to be considered. Storage of atmospheric CO 2 into stable organic carbon pools in the soil can sequester CO 2 while common crop production practices can produce CO 2, generate N 2O, and decrease the soil sink for atmospheric CH 4. The overall balance between the net exchange of these gases constitutes the net global warming potential (GWP) of a crop production system. Trace gas flux and soil organic carbon (SOC) storage data from long-term studies, a rainfed site in Michigan that contrasts conventional tillage (CT) and no-till (NT) cropping, a rainfed site in northeastern Colorado that compares cropping systems in NT, and an irrigated site in Colorado that compares tillage and crop rotations, are used to estimate net GWP from crop production systems. Nitrous oxide emissions comprised 40–44% of the GWP from both rain-fed sites and contributed 16–33% of GWP in the irrigated system. The energy used for irrigation was the dominant GWP source in the irrigated system. Whether a system is a sink or source of CO 2, i.e. net GWP, was controlled by the rate of SOC storage in all sites. SOC accumulation in the surface 7.5 cm of both rainfed continuous cropping systems was approximately 1100 kg CO 2 equivalents ha −1 y −1. Carbon accrual rates were about three times higher in the irrigated system. The rainfed systems had been in NT for >10 years while the irrigated system had been converted to NT 3 years before the start of this study. It remains to be seen if the C accrual rates decline with time in the irrigated system or if N 2O emission rates decline or increase with time after conversion to NT. Key words Climate change Greenhouse gases Nitrous oxide No-till Soil organic carbon References Bronson, K.F., Mosier, A.R. 1993 Nitrous oxide emissions and methane consumption in wheat and corn-cropped systems in Northeastern Colorado Harper, L.A. Mosier, A.R. Duxbury, J.M. Rolston, D.E. eds. Agricultural Ecosystem Effects on Trace Gases and Global Climate Change Am. Soc. Agron Madison, WI 133 144 Google Scholar Caldeira, K., Morgan, G., Baldocchi, D., Brewer, P., Chen, C.T.A., Nabuurs, G.-J., Nakicenovic, N., Robertson, G.P. 2004 A portfolio of carbon management options Field, C.B. eds. Towards CO 2 Stabilization Island Press New York Google Scholar
Council for Agricultural Science and Technology (CAST) 2004. Climate Change and Greenhouse Gas Mitigation: Challenges and Opportunities for AgricultureTask Force Report No. 141. CAST, Ames, IAUSA720 pp.
Cole, C.V., Duxbury, J., Freney, J., Heinemeyer, O., Minami, K., Mosier, A., Paustian, K., Rosenberg, N, Sampson, N., Sauerbeck, D., Zhao, Q. 1997 Global estimates of potential mitigation of greenhouse gas emissions by agriculture Nutr. Cycl. Agroecosyst. 49 221 228 CrossRef Google Scholar Del Grosso, S.J., Ojima, D.S., Parton, W.J., Mosier, A.R. 2002 Simulated effects of tillage and timing of N fertilizer application on net greenhouse gas fluxes and N losses from agricultural soils in the Midwestern USA Ham , J. Baede, A.P.M. Guicherit, R. Williams-Jacobse, G.F.M. eds. Non-CO 2 Greenhouse Gases; Proceedings NCGG-3 Millpress Rotterdamthe Netherlands 23 29 Google Scholar Follett, R.F. 2001 Soil management concepts and carbon sequestration in cropland soils Soil Till. Res. 61 77 92 CrossRef Google Scholar Halvorson, A.D., Mosier, A.R., Reule, C.A. 2004 Nitrogen and crop management influence irrigated corn yields and greenhouse gas emissions Alan Schlegel, eds. Proc. 2004 Great Plains Soil Fertility Conf.Vol. 10 DenverCO. Kansas State Univ. Manhattan, KS 21 27 Google Scholar Hutchinson, G.L., Mosier, A.R. 1981 Improved soil cover method for field measurement of nitrous oxide fluxes Soil Sci. Soc. Am. J. 45 311 316 Google Scholar
Intergovernmental Panel on Climate Change (IPCC) 2001. Technical Summary of the 3rd Assessment Report of Working Group 1. D.L. Albritton and L.G. Meira Filho (Co-ordinating lead authors). 63 pp.
Kroeze, C., Mosier, A.R., Bouwman, L. 1999 Closing the global N 2O budget: a retrospective analysis 1500–1994 Global Biogeochem. Cycles 13 1 8 CrossRef Google Scholar Livingston, G.P., Hutchinson, G.L. 1995 Enclosurebased measurement of trace gas exchange: applications and sources of error Matson, P.A. Harriss, R.C. eds. Biogenic Trace Gases: Measuring Emissions from Soil and Water Blackwell Science London 14 51 Google Scholar Mosier, A.R., Mack, L. 1980 Gas chromatographic system for preciserapid analysis of N 2O Soil Sci. Soc. Am. J. 44 1121 1123 Google Scholar Mosier, A.R., Schimel, D.S., Valentine, D.W., Bronson, K.F., Parton, W.J. 1991 Methane and nitrous oxide fluxes in nativefertilized and cultivated grasslands Nature 350 330 332 CrossRef Google Scholar Mosier, A.R., Parton, W.J., Valentine, D.W., Ojima, D.S., Schimel, D.S., Delgado, J.A. 1996 CH 4N 2O fluxes in the Colorado shortgrass steppe: I. Impact of landscape and nitrogen addition Global Biogeochem. Cycles 10 387 399 CrossRef Google Scholar Mosier, A.R., Parton, W.J., Valentine, D.W., Ojima, D.S., Schimel, D.S., Heinemeyer, O. 1997 CH 4N 2O fluxes in the Colorado shortgrass steppe. 2. Long-term impact of land use change Global Biogeochem. Cycles 11 29 42 CrossRef Google Scholar Peterson, G.A., Westfal, D.G., Cole, C.V. 1993 Agroecosystem approach to soil and crop management research Soil Sci. Soc. Am. J. 57 1354 1360 Google Scholar Robertson, G.P. 2004 Abatement of nitrous oxidemethaneand the other non-CO 2 greenhouse gases Field, C.B. eds. Towards CO 2 Stabilization Island Press Washington, DC Google Scholar Robertson, G.P., Grace, P.R. 2004 Greenhouse gas fluxes in tropical and temperate agriculture: the need for a full-cost accounting of global warming potentials Environ. Dev. Sustainability 6 51 63 CrossRef Google Scholar Robertson, G.P., Klingensmith, K.M., Klug, M.J., Paul, E.A., Crum, J.C., Ellis, B.G. 1997 Soil resources, microbial activity, and primary production across an agricultural ecosystem Ecol. Appl. 7 158 170 Google Scholar Robertson, G.P., Paul, E.A., Harwood, R.R. 2000 Greenhouse gases in intensive agriculture: contributions of individual gases to the radiative forcing of the atmosphere Science 289 1922 1925 CrossRef PubMed Google Scholar Sherrod, L.A., Peterson, G.A., Westfall, D.G., Ahuja, L.R. 2003 Cropping intensity enhances soil organic carbon and nitrogen in a no-till agroecosystem Soil Sci. Soc. Am. J. 67 1533 1543 Google Scholar Six, J., Ogle, S.M., Breidt, F.J., Conant, R.T., Mosier, A.R., Paustian, K. 2004 The potential to mitigate global warming with no-tillage management is only realized when practiced in the long term Global Change Biol. 10 155 160 CrossRef Google Scholar
United States Environmental Protection Agency (USEPA) 2002. Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2000. Office of Atmospheric Programs (6201J). Environmental Protection Agency 236-R-00-001.
West, T.O., Marland, G. 2002 A synthesis of carbon sequestration, carbon emissions, and net carbon flux in agriculture: comparing tillage practices in the United States Agricult. Ecosyst. Environ. 91 217 232 CrossRef Google Scholar West, T.O., Post, W.M. 2002 Soil organic carbon sequestration rates by tillage and crop rotation: a global data analysis Soil Sci. Soc. Am. J. 66 1930 1946 Google Scholar