Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue

Kravchenko, Alexandra N.; Toosi, Ehsan R.; Guber, Andrey K.; Ostrom, Nathaniel E.; Yu, J.; Azeem, K.; Rivers, Mark L.; Robertson, G. Philip

doi:10.5061/dryad.83150

Title: Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue

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Abstract

N2O is a highly potent greenhouse gas and arable soils represent its major anthropogenic source. Field-scale assessments and predictions of soil N2O emission remain uncertain and imprecise due to the episodic and microscale nature of microbial N2O production, most of which occurs within very small discrete soil volumes. Such hotspots of N2O production are often associated with decomposing plant residue. Here we quantify physical and hydrological soil characteristics that lead to strikingly accelerated N2O emissions in plant residue-induced hotspots. Results reveal a mechanism for microscale N2O emissions: water absorption by plant residue that creates unique micro-environmental conditions, markedly different from those of the bulk soil. Moisture levels within plant residue exceeded those of bulk soil by 4–10-fold and led to accelerated N2O production via microbial denitrification. The presence of large (∅ >35 μm) pores was a prerequisite for maximized hotspot N2O production and for subsequent diffusion to the atmosphere. Understanding and modelling hotspot microscale physical and hydrologic characteristics is a promising route to predict N2O emissions and thus to develop effective mitigation strategies and estimate global fluxes in a changing environment.

Authors:

Kravchenko, Alexandra N.; Toosi, Ehsan R.; Guber, Andrey K.; Ostrom, Nathaniel E.; Yu, J.; Azeem, K.; Rivers, Mark L.; Robertson, G. Philip

Michigan State Univ., East Lansing, MI (United States); OSTI
Michigan State Univ., East Lansing, MI (United States)
Hubei Univ., Wuhan (China)
Univ. of Agriculture, Peshawar (Pakistan)
Univ. of Chicago, IL (United States)

Publication Date:: Fri Nov 01 04:00:00 UTC 2019

DOE Contract Number:: FC02-07ER64494; FG02-94ER14466

Research Org.:: Great Lakes Bioenergy Research Center, Madison, WI (United States); Univ. of Wisconsin, Madison, WI (United States); Univ. of Chicago, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Subject:: 54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES

OSTI Identifier:: 1873990

DOI:: https://doi.org/10.5061/dryad.83150

Citation Formats


                    Kravchenko, Alexandra N., Toosi, Ehsan R., Guber, Andrey K., Ostrom, Nathaniel E., Yu, J., Azeem, K., Rivers, Mark L., and Robertson, G. Philip. Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue.  United States: N. p., 2019. 
        Web.  doi:10.5061/dryad.83150.

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                    Kravchenko, Alexandra N., Toosi, Ehsan R., Guber, Andrey K., Ostrom, Nathaniel E., Yu, J., Azeem, K., Rivers, Mark L., & Robertson, G. Philip. Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue.  United States.  doi:https://doi.org/10.5061/dryad.83150

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                    Kravchenko, Alexandra N., Toosi, Ehsan R., Guber, Andrey K., Ostrom, Nathaniel E., Yu, J., Azeem, K., Rivers, Mark L., and Robertson, G. Philip. 2019.  
"Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue".  United States.  doi:https://doi.org/10.5061/dryad.83150.  https://www.osti.gov/servlets/purl/1873990. Pub date:Fri Nov 01 04:00:00 UTC 2019

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@article{osti_1873990,

  title        = {Data from: Hotspots of soil N2O emission enhanced through water absorption by plant residue},

  author       = {Kravchenko, Alexandra N. and Toosi, Ehsan R. and Guber, Andrey K. and Ostrom, Nathaniel E. and Yu, J. and Azeem, K. and Rivers, Mark L. and Robertson, G. Philip},

  abstractNote = {N2O is a highly potent greenhouse gas and arable soils represent its major anthropogenic source. Field-scale assessments and predictions of soil N2O emission remain uncertain and imprecise due to the episodic and microscale nature of microbial N2O production, most of which occurs within very small discrete soil volumes. Such hotspots of N2O production are often associated with decomposing plant residue. Here we quantify physical and hydrological soil characteristics that lead to strikingly accelerated N2O emissions in plant residue-induced hotspots. Results reveal a mechanism for microscale N2O emissions: water absorption by plant residue that creates unique micro-environmental conditions, markedly different from those of the bulk soil. Moisture levels within plant residue exceeded those of bulk soil by 4–10-fold and led to accelerated N2O production via microbial denitrification. The presence of large (∅ >35 μm) pores was a prerequisite for maximized hotspot N2O production and for subsequent diffusion to the atmosphere. Understanding and modelling hotspot microscale physical and hydrologic characteristics is a promising route to predict N2O emissions and thus to develop effective mitigation strategies and estimate global fluxes in a changing environment.},

  doi          = {10.5061/dryad.83150},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Nov 01 04:00:00 UTC 2019},

  month        = {Fri Nov 01 04:00:00 UTC 2019}

}

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DOI: https://doi.org/10.5061/dryad.83150

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