Methods for assessing laterally-resolved distribution, speciation and bioavailability of phosphorus in soils

Bom, Frederik van der; Kopittke, Peter M.; Raymond, Nelly Sophie; Sekine, Ryo; Lombi, Enzo; Mueller, Carsten W.; Doolette, Casey L.

doi:10.1007/s11157-021-09602-z

Cited by 18 publications

(11 citation statements)

References 102 publications

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“…Weathering and Podzolisation mechanisms disassemble rock-bearing minerals into basic molecular units. Through biogeochemical processes, these units combine to form micro/submicron-sized soil particles of unique structures and physical and biogeochemical properties van der Bom et al, 2022). In the soils studied, at several microsites in the B horizon, µ-focused XANES confirmed the predominance of Al-bound P, most likely ITN-bound P.…”

Section: Phosphorus Speciation In Micrositesmentioning

confidence: 82%

“…Hedley et al, 1982). However, the results provide limited insights into specific P forms, reactivity, interactions, and distribution among P-bearing minerals in soils (van der Bom et al, 2022). Furthermore, the soil is heterogeneous and contains low-P and highly concentrated microsized P spots that also vary greatly in terms of the composition of P species (Adediran et al, 2022).…”

Section: Abbreviationsmentioning

confidence: 98%

“…Thus, routine chemical extractions may underestimate or overestimate P concentration in soil microsites (microscale spots with unique properties within the bulk soil) in the subsample used for analysis. Therefore, understanding microscale P speciation is essential to understand better the biogeochemical mechanisms involved, affecting P dynamics and soil fertility van der Bom et al, 2022).…”

Section: Abbreviationsmentioning

confidence: 99%

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Phosphorus chemistry in managed forest soils : effects of weathering and wood ash fertilisation

Tuyishime¹

2022

Acta Universitatis Agriculturae Sueciae

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Weathering and Podzolisation are key mechanisms that transform primary mineral apatite into a phosphorus (P) pool with low solubility. In addition, intensive forest harvesting removes nutrients from the soil, reducing P availability. In this thesis, a combination of wet chemical extractions, bulk X-ray absorption near-edge structure (bulk-XANES) spectroscopy, microscopic X-ray fluorescence (μ-XRF) imaging, and μ-XANES was applied to seven Podzolised soils (down to 1 m depth) across Sweden, to study molecular P speciation in the bulk soil and in microsites. Moreover, this thesis examined the fate of wood ash-bound P, when added alone or with repeated nitrogen (N) fertilisation, to the organic layer to return P removed after harvest. Total P (TP) in the upper 80 cm was 69−379 g m−2, with 94% of all P residing between 20−80 cm. More than 50% of all P in B and C horizons was Al-bound P, bound mainly to imogolite-type nanoparticles (ITN), while apatite comprised about 26%. Wood ash increased TP in the organic layer by 6−28 kg P ha−1, equivalent to 17−39% of the initial ash-P content. More bioavailable P (Olsen-P) and aboveground biomass P were observed in the ash treatment than in the control, probably due to the dissolution of Ca-bound P from the ash. Wood ash application, especially at a high dose, also increased Al-bound P (p < 0.001) by up to 15.6 kg P ha−1. P speciation across soil profiles was found to be strongly influenced by weathering and Podzolisation, with TP and apatite depletion in the E horizon and mainly Al-bound P and Fe-bound P in the B horizon. Dissolution of Ca-bound P from the ash was almost complete 13−24 years after ash application, which contributed to increased P availability and P uptake. These novel findings can be useful in improving forest management practices to ensure the long-term sufficiency of P supply to trees. Further work is required to understand the importance of the subsoil for the P supply from the subsoil and to study the fate of wood ash-bound P in the mineral soil.

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Section: Phosphorus Speciation In Micrositesmentioning

confidence: 82%

Section: Abbreviationsmentioning

confidence: 98%

Section: Abbreviationsmentioning

confidence: 99%

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Phosphorus chemistry in managed forest soils : effects of weathering and wood ash fertilisation

Tuyishime¹

2022

Acta Universitatis Agriculturae Sueciae

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“…Reviews on the use of XRFS in soil and plant analysis covered methods related to the in situ mapping and availability of P in soils 119 (106 references), advances in plant imaging 211 (172 references) and potential problems commonly encountered during forensic soil analysis 212 (46 references).…”

Section: Analysis Of Soils Plants and Related Materialsmentioning

confidence: 99%

“…Element-or nuclide-specic reviews featured the measurement of total, inorganic and organic P in plant tissue (95 references) 118 ; mapping and speciation of P in soil (105 references) 119 ; speciation of As in traditional Chinese medicines, including medicinal plants (79 references); 120 and determination of 129 I concentrations and 129 I/ 127 I isotope ratios in environmental samples (96 references). 121 Analytical methods for the determination of PTEs in plants were the topic of two reviews.…”

Section: Review Papersmentioning

confidence: 99%