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Estimates of Mean Residence Times of Phosphorus in Commonly Considered Inorganic Soil Phosphorus Pools by Julian Helfenstein; Chiara Pistocchi; Astrid Oberson; Federica Tamburini; Daniel S. Goll; Emmanuel Frossard is a Environmental Science article available to read on EtoBox.
What is Estimates of Mean Residence Times of Phosphorus in Commonly Considered Inorganic Soil Phosphorus Pools about?
Abstract. Quantification of turnover of inorganic soil phosphorus (P) pools is essential to improve our understanding of P cycling in soil–plant systems and improve representations of the P cycle in land surface models. Turnover can be quantified using mean residence time (MRT); however, to date there is little information on MRT of P in soil P pools. We introduce an approach to quantify MRT of P in sequentially extracted inorganic soil P pools using data from isotope exchange kinetic experiments. Our analyses of 53 soil samples from the literature showed that MRT of labile P (resin- and bicarbonate-extractable P) was on the order of minutes to hours for most soils, MRT in NaOH-extractable P (NaOH-P) was in the range of days to months, and MRT in HCl-extractable P (HCl-P) was on the order of years to millennia. Multiple-regression models were able to capture 54 %–63 % of the variability in MRT among samples and showed that land use was the most important predictor of MRT of P in labile and NaOH pools. MRT of P in HCl-P was strongly dependent on pH, as high-pH soils tended to have longer MRTs. This was interpreted to be related to the composition of HCl-P. Under high pH, HCl-P conta
Who reads Estimates of Mean Residence Times of Phosphorus in Commonly Considered Inorganic Soil Phosphorus Pools?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Julian Helfenstein; Chiara Pistocchi; Astrid Oberson; Federica Tamburini; Daniel S. Goll; Emmanuel Frossard
- Publisher
- Copernicus GmbH; Göttingen: Copernicus Publ. (ISSN 1726-4189)
- Published
- 2020
- Language
- EN
- Field
- Environmental Science (Physical Sciences)