Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth
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Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth. / Werner, Florian; Mueller, Carsten W.; Thieme, Jürgen; Gianoncelli, Alessandra; Rivard, Camille; Höschen, Carmen; Prietzel, Jörg.
In: Scientific Reports, Vol. 7, No. 1, 3203, 01.12.2017.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Micro-scale heterogeneity of soil phosphorus depends on soil substrate and depth
AU - Werner, Florian
AU - Mueller, Carsten W.
AU - Thieme, Jürgen
AU - Gianoncelli, Alessandra
AU - Rivard, Camille
AU - Höschen, Carmen
AU - Prietzel, Jörg
PY - 2017/12/1
Y1 - 2017/12/1
N2 - 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. Our results indicate that micro-scale spatial and chemical heterogeneity of P influences P accessibility and bioavailability.
AB - 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. Our results indicate that micro-scale spatial and chemical heterogeneity of P influences P accessibility and bioavailability.
U2 - 10.1038/s41598-017-03537-8
DO - 10.1038/s41598-017-03537-8
M3 - Journal article
C2 - 28600571
AN - SCOPUS:85020683455
VL - 7
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 3203
ER -
ID: 239160430