Soil solution phosphorus turnover: derivation, interpretation, and insights from a global compilation of isotope exchange kinetic studies
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Published:2018-01-08
Issue:1
Volume:15
Page:105-114
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ISSN:1726-4189
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Container-title:Biogeosciences
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language:en
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Short-container-title:Biogeosciences
Author:
Helfenstein JulianORCID, Jegminat Jannes, McLaren Timothy I., Frossard Emmanuel
Abstract
Abstract. The exchange rate of inorganic phosphorus (P) between the
soil solution and solid phase, also known as soil solution P turnover, is
essential for describing the kinetics of bioavailable P. While soil solution
P turnover (Km) can be determined by tracing radioisotopes in a
soil–solution system, few studies have done so. We believe that this is due
to a lack of understanding on how to derive Km from isotopic exchange
kinetic (IEK) experiments, a common form of radioisotope dilution study.
Here, we provide a derivation of calculating Km using parameters
obtained from IEK experiments. We then calculated Km for 217 soils from
published IEK experiments in terrestrial ecosystems, and also that of 18
long-term P fertilizer field experiments. Analysis of the global compilation
data set revealed a negative relationship between concentrations of soil
solution P and Km. Furthermore, Km buffered isotopically
exchangeable P in soils with low concentrations of soil solution P. This
finding was supported by an analysis of long-term P fertilizer field
experiments, which revealed a negative relationship between Km and
phosphate-buffering capacity. Our study highlights the importance of
calculating Km for understanding the kinetics of P between the soil
solid and solution phases where it is bioavailable. We argue that our
derivation can also be used to calculate soil solution turnover of other
environmentally relevant and strongly sorbing elements that can be traced
with radioisotopes, such as zinc, cadmium, nickel, arsenic, and uranium.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
Reference60 articles.
1. Achat, D. L., Bakker, M. R., Augusto, L., Saur, E., Dousseron, L., and
Morel, C.: Evaluation of the phosphorus status of P-deficient podzols in
temperate pine stands: combining isotopic dilution and extraction methods,
Biogeochemistry, 92, 183–200, https://doi.org/10.1007/s10533-008-9283-7, 2009. 2. Achat, D. L., Bakker, M. R., Augusto, L., Derrien, D., Gallegos, N., Lashchinskiy, N., Milin, S., Nikitich, P., Raudina, T.,
Rusalimova, O., Zeller, B., and Barsukov, P.: Phosphorus status of soils from contrasting forested ecosystems in southwestern
Siberia: effects of microbiological and physicochemical properties, Biogeosciences, 10, 733–752, https://doi.org/10.5194/bg-10-733-2013, 2013. 3. Achat, D. L., Pousse, N., Nicolas, M., Brédoire, F., and Augusto, L.:
Soil properties controlling inorganic phosphorus availability: general
results from a national forest network and a global compilation of the
literature, Biogeochemistry, 127, 255–272, https://doi.org/10.1007/s10533-015-0178-0, 2016. 4. Adler, D.: vioplot: Violin plot, R Package version 0.2. 2005. 5. Andersson, K. O., Tighe, M. K., Guppy, C. N., Milham, P. J., McLaren, T. I.,
Schefe, C. R., and Lombi, E.: XANES Demonstrates the Release of Calcium
Phosphates from Alkaline Vertisols to Moderately Acidified Solution,
Environ. Sci. Technol., 50, 4229–4237,
https://doi.org/10.1021/acs.est.5b04814, 2016.
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