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Title: Impacts of waterlogging on soil nitrification and ammonia-oxidizing communities in farming system
Contributor(s): Nguyen, Linh T T  (author)orcid ; Osanai, Yui  (author)orcid ; Anderson, Ian C (author); Bange, Michael P (author); Braunack, Michael (author); Tissue, David T (author); Singh, Brajesh K (author)
Publication Date: 2018-05
Early Online Version: 2018-03-26
DOI: 10.1007/s11104-018-3584-y
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Abstract: Background and aims: Waterlogging may affect soil nitrification rates, resulting in changes in plant-available nitrogen (N), and hence potentially influencing crop productivity. Because nitrification is a microbially-driven process and ammonia-oxidizing communities regulate soil nitrification rates, the aim of this study was to investigate the mechanistic response of ammonia-oxidizing communities and nitrification rates to waterlogging. Methods: A field study was conducted by experimentally imposing two short-term waterlogging events when cotton plants were at the early- and late-flowering stages. Soil physicochemical properties, nitrification rates, and ammonia-oxidizing community abundance and structure in response to waterlogging were examined. Results: Soil nitrate (NO₃−) content, potential nitrification rates (PNR) and the abundance of ammonia-oxidizing communities significantly decreased upon waterlogging. Shifts in ammonia-oxidizing community structure were also observed. Both ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) responded to waterlogging. PNR was significantly correlated with the abundance and structure of both AOB and AOA. Conclusions: Waterlogging had strong negative effects on soil nitrification rates by altering the ammonia-oxidizing community abundance and structure, resulting in reduced soil N availability. Decreased plant-available N is likely to negatively affect primary productivity.
Publication Type: Journal Article
Grant Details: ARC/DP170104634
Source of Publication: Plant and Soil, 426(1-2), p. 299-311
Publisher: Springer Netherlands
Place of Publication: The Netherlands
ISSN: 0032-079X
Field of Research (FOR): 060504 Microbial Ecology
069902 Global Change Biology
070108 Sustainable Agricultural Development
Socio-Economic Outcome Codes: 960307 Effects of Climate Change and Variability on Australia (excl. Social Impacts)
820301 Cotton
960305 Ecosystem Adaptation to Climate Change
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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