Articles | Volume 19, issue 13
Biogeosciences, 19, 3169–3184, 2022
https://doi.org/10.5194/bg-19-3169-2022
Biogeosciences, 19, 3169–3184, 2022
https://doi.org/10.5194/bg-19-3169-2022
Research article
06 Jul 2022
Research article | 06 Jul 2022

Episodic N2O emissions following tillage of a legume–grass cover crop mixture

Alison Bressler and Jennifer Blesh

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Cited articles

Alluvione, F., Bertora, C., Zavattaro, L., and Grignani, C.: Nitrous oxide and carbon dioxide emissions following green manure and compost fertilization in corn, Soil Sci. Soc. Am. J., 74, 384–395, https://doi.org/10.2136/sssaj2009.0092, 2010. 
Baggs, E. M., Stevenson, M., Pihlatie, M., Regar, A., Cook, H., and Cadisch, G.: Nitrous oxide emissions following application of residues and fertilizer under zero and conventional tillage, Plant Soil, 254, 361–370, https://doi.org/10.1023/A:1025593121839, 2003. 
Basche, A. D., Miguez, F. E., Kasper, T. C., and Castellano, M. J.: Do cover crops increase or decrease nitrous oxide emissions? A meta-analysis, J. Soil Water Conserv., 69, 471–482, https://doi.org/10.2489/jswc.69.6.471, 2014. 
Blesh, J.: Functional traits in cover crop mixtures: Biological nitrogen fixation and multifunctionality, J. Appl. Ecol., 55, 38–48, https://doi.org/10.1111/1365-2664.13011, 2017. 
Blesh, J.: Feedbacks between nitrogen fixation and soil organic matter increase ecosystem functions in diversified agroecosystems, Ecol. Appl., e01986, https://doi.org/10.1002/eap.1986, 2019. 
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Our field experiment tested if a mixture of a nitrogen-fixing legume and non-legume cover crop could reduce nitrous oxide (N2O) emissions following tillage, compared to the legume grown alone. We found higher N2O following both legume treatments, compared to those without, and lower emissions from the cover crop mixture at one of the two test sites, suggesting that interactions between cover crop types and soil quality influence N2O emissions.
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