Soil nitrogen transformations under elevated atmospheric CO2 and O3 during the soybean growing season

Authors

Engil Isadora Pujol Pereira, The University of Texas Rio Grande ValleyFollow
Haegeun Chung
Kate Scow
Michael J. Sadowsky
Chris van Kessel

Document Type

Article

Publication Date

2-2011

Abstract

We investigated the influence of elevated CO2 and O3 on soil N cycling within the soybean growing season and across soil environments (i.e., rhizosphere and bulk soil) at the Soybean Free Air Concentration Enrichment (SoyFACE) experiment in Illinois, USA. Elevated O3 decreased soil mineral N likely through a reduction in plant material input and increased denitrification, which was evidenced by the greater abundance of the denitrifier gene nosZ. Elevated CO2 did not alter the parameters evaluated and both elevated CO2 and O3 showed no interactive effects on nitrifier and denitrifier abundance, nor on total and mineral N concentrations. These results indicate that elevated CO2 may have limited effects on N transformations in soybean agroecosystems. However, elevated O3 can lead to a decrease in soil N availability in both bulk and rhizosphere soils, and this likely also affects ecosystem productivity by reducing the mineralization rates of plant-derived residues.

Comments

© 2010 Elsevier Ltd. All rights reserved. Original published version available at https://doi.org/10.1016/j.envpol.2010.10.033

Recommended Citation

Pujol Pereira, E. I., Chung, H., Scow, K., Sadowsky, M. J., van Kessel, C., & Six, J. (2011). Soil nitrogen transformations under elevated atmospheric CO₂ and O₃ during the soybean growing season. Environmental pollution (Barking, Essex : 1987), 159(2), 401–407. https://doi.org/10.1016/j.envpol.2010.10.033

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.

Publication Title

Environmental Pollution

DOI

10.1016/j.envpol.2010.10.033