Determining the effect of drying time on phosphorus solubilization from three agricultural soils under climate change scenarios

Forber, K. J., Ockenden, M. C., Wearing, C., Hollaway, M. J., Falloon, P. D., Kahana, R., Villamizar, M. L., Zhou, J. G., Withers, P. J.A., Beven, K. J., Collins, A. L., Evans, R., Hiscock, K. M. ORCID:, Macleod, C. J.A. and Haygarth, P. M. (2017) Determining the effect of drying time on phosphorus solubilization from three agricultural soils under climate change scenarios. Journal of Environmental Quality, 46 (5). pp. 1131-1136. ISSN 0047-2425

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Climate projections for the future indicate that the United Kingdom will experience hotter, drier summers and warmer, wetter winters, bringing longer dry periods followed by rewetting. This will result in changes in phosphorus (P) mobilization patterns that will influence the transfer of P from land to water. We tested the hypothesis that changes in the future patterns of drying-rewetting will affect the amount of soluble reactive phosphorus (SRP) solubilized from soil. Estimations of dry period characteristics (duration and temperature) under current and predicted climate were determined using data from the UK Climate Projections (UKCP09) Weather Generator tool. Three soils (sieved < 2 mm), collected from two regions of the United Kingdom with different soils and farm systems, were dried at 25°C for periods of 0, 2, 4, 5, 6, 8, 10, 15, 20, 25, 30, 60, and 90 d, then subsequently rewetted (50 mL over 2 h). The solubilized leachate was collected and analyzed for SRP. In the 2050s, warm period temperature extremes > 25°C are predicted in some places and dry periods of 30 to 90 d extremes are predicted. Combining the frequency of projected dry periods with the SRP concentration in leachate suggests that this may result overall in increased mobilization of P; however, critical breakpoints of 6.9 to 14.5 d dry occur wherein up to 28% more SRP can be solubilized following a rapid rewetting event. The precise cause of this increase could not be identified and warrants further investigation as the process is not currently included in P transfer models.

Item Type: Article
Additional Information: Funding Information: Acknowledgments This work was funded by the Natural Environment Research Council (NERC) under the Changing Water Cycles Programme; projects NE/ K002392/1, NE/K002430/1, NE/K002406/1 (NUTCAT 2050) and supported by the Joint UK BEIS/Defra Met Office Hadley Centre Climate Programme (GA01101).We acknowledge the Demonstration Test Catchment (DTC) project for assistance with collection of soils. The UK Climate Projections have been made available by the Department for Environment, Food and Rural Affairs (Defra) and the Department of Energy and Climate Change (DECC) under license from the Met Office, UKCIP, British Atmospheric Data Centre, Newcastle University, University of East Anglia, Environment Agency, Tyndall Centre, and Proudman Oceanographic Laboratory. These organizations give no warranties, express or implied, as to the accuracy of the UKCP09 and do not accept any liability for loss or damage, which may arise from reliance on the UKCP09, and any use of the UKCP09 is undertaken entirely at the user’s risk. Publisher Copyright: © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. 5585 Guilford Rd., Madison, WI 53711 USA.
Uncontrolled Keywords: environmental engineering,water science and technology,waste management and disposal,pollution,management, monitoring, policy and law,sdg 13 - climate action ,/dk/atira/pure/subjectarea/asjc/2300/2305
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Social Sciences > Research Centres > Water Security Research Centre
Faculty of Science > Research Groups > Geosciences
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Depositing User: LivePure Connector
Date Deposited: 11 Oct 2022 10:31
Last Modified: 24 Oct 2022 07:32
DOI: 10.2134/jeq2017.04.0144

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