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

Engil Isadora Pujol Pereira; Haegeun Chung; Kate Scow; Michael J. Sadowsky; Chris Van Kessel; Johan Six

doi:10.1016/j.envpol.2010.10.033

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

Engil Isadora Pujol Pereira, Haegeun Chung, Kate Scow, Michael J. Sadowsky, Chris Van Kessel, Johan Six

Soil, Water, and Climate

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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.

Original language	English (US)
Pages (from-to)	401-407
Number of pages	7
Journal	Environmental Pollution
Volume	159
Issue number	2
DOIs	https://doi.org/10.1016/j.envpol.2010.10.033
State	Published - Feb 2011

Bibliographical note

Funding Information:
This research was funded by the National Science Foundation (grant # NSF-DEB 0543218 ). Additional support was provided by Award Number P42ES004699 from the National Institute of Environmental Health Sciences. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute of Environmental Health Sciences or the National Institutes of Health.

Keywords

Denitrification
FACE
Nitrification
Real-time quantitative PCR
Soil N cycling

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10.1016/j.envpol.2010.10.033

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title = "Soil nitrogen transformations under elevated atmospheric CO2 and O3 during the soybean growing season",

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.",

keywords = "Denitrification, FACE, Nitrification, Real-time quantitative PCR, Soil N cycling",

author = "{Pujol Pereira}, {Engil Isadora} and Haegeun Chung and Kate Scow and Sadowsky, {Michael J.} and {Van Kessel}, Chris and Johan Six",

note = "Funding Information: This research was funded by the National Science Foundation (grant # NSF-DEB 0543218 ). Additional support was provided by Award Number P42ES004699 from the National Institute of Environmental Health Sciences. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute of Environmental Health Sciences or the National Institutes of Health.",

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AU - Sadowsky, Michael J.

AU - Van Kessel, Chris

AU - Six, Johan

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N2 - 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.

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