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Title: Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth

Abstract

Soils comprise various heterogeneously distributed pools of lithogenic, free organic, occluded, adsorbed, and precipitated phosphorus (P) forms, which differ depending on soil forming factors. Small-scale heterogeneity of element distributions recently has received increased attention in soil science due to its influence on soil functions and soil fertility. We investigated the micro-scale distribution of total P and different specific P binding forms in aggregates taken from a high-P clay-rich soil and a low-P sandy soil by combining advanced spectrometric and spectroscopic techniques to introduce new insights on P accessibility and availability in soils. Here we show that soil substrate and soil depth determine micro-scale P heterogeneity in soil aggregates. In P-rich areas of all investigated soil aggregates, P was predominantly co-located with aluminium and iron oxides and hydroxides, which are known to strongly adsorb P. Clay minerals were co-located with P only to a lesser extent. In the low-P topsoil aggregate, the majority of the P was bound organically. Aluminium and iron phosphate predominated in the quartz-rich low-P subsoil aggregate. Sorbed and mineral P phases determined P speciation in the high-P top- and subsoil, and apatite was only detected in the high-P subsoil aggregate. Lastly, our results indicate that micro-scale spatialmore » and chemical heterogeneity of P influences P accessibility and bioavailability.« less

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [4]; ORCiD logo [1];  [1]
  1. Technical Univ. of Munich, Freising (Germany)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy)
  4. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1433954
Report Number(s):
BNL-203474-2018-JAAM
Journal ID: ISSN 2045-2322
Grant/Contract Number:
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Element cycles; Geochemistry

Citation Formats

Werner, Florian, Mueller, Carsten W., Thieme, Jurgen, Gianoncelli, Alessandra, Rivard, Camille, Hoschen, Carmen, and Prietzel, Jorg. Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth. United States: N. p., 2017. Web. doi:10.1038/s41598-017-03537-8.
Werner, Florian, Mueller, Carsten W., Thieme, Jurgen, Gianoncelli, Alessandra, Rivard, Camille, Hoschen, Carmen, & Prietzel, Jorg. Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth. United States. doi:10.1038/s41598-017-03537-8.
Werner, Florian, Mueller, Carsten W., Thieme, Jurgen, Gianoncelli, Alessandra, Rivard, Camille, Hoschen, Carmen, and Prietzel, Jorg. Fri . "Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth". United States. doi:10.1038/s41598-017-03537-8. https://www.osti.gov/servlets/purl/1433954.
@article{osti_1433954,
title = {Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth},
author = {Werner, Florian and Mueller, Carsten W. and Thieme, Jurgen and Gianoncelli, Alessandra and Rivard, Camille and Hoschen, Carmen and Prietzel, Jorg},
abstractNote = {Soils comprise various heterogeneously distributed pools of lithogenic, free organic, occluded, adsorbed, and precipitated phosphorus (P) forms, which differ depending on soil forming factors. Small-scale heterogeneity of element distributions recently has received increased attention in soil science due to its influence on soil functions and soil fertility. We investigated the micro-scale distribution of total P and different specific P binding forms in aggregates taken from a high-P clay-rich soil and a low-P sandy soil by combining advanced spectrometric and spectroscopic techniques to introduce new insights on P accessibility and availability in soils. Here we show that soil substrate and soil depth determine micro-scale P heterogeneity in soil aggregates. In P-rich areas of all investigated soil aggregates, P was predominantly co-located with aluminium and iron oxides and hydroxides, which are known to strongly adsorb P. Clay minerals were co-located with P only to a lesser extent. In the low-P topsoil aggregate, the majority of the P was bound organically. Aluminium and iron phosphate predominated in the quartz-rich low-P subsoil aggregate. Sorbed and mineral P phases determined P speciation in the high-P top- and subsoil, and apatite was only detected in the high-P subsoil aggregate. Lastly, our results indicate that micro-scale spatial and chemical heterogeneity of P influences P accessibility and bioavailability.},
doi = {10.1038/s41598-017-03537-8},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Fri Jun 09 00:00:00 EDT 2017},
month = {Fri Jun 09 00:00:00 EDT 2017}
}

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