Hauptseite > Publikationsdatenbank > Colloid-bound and dissolved phosphorus species in topsoil water extracts along a grassland transect from Cambisol to Stagnosol > print

001     827862
005     20210129225938.0
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037 _ _ |a FZJ-2017-01950
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082 _ _ |a 570
100 1 _ |a Jiang, Xiaoqian
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245 _ _ |a Colloid-bound and dissolved phosphorus species in topsoil water extracts along a grassland transect from Cambisol to Stagnosol
260 _ _ |c 2017
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520 _ _ |a Phosphorus (P) species in colloidal and “dissolved” soil fractions may have different distributions. To understand which P species are potentially involved, we obtained water extracts from the surface soils of a gradient 5 from Cambisol, Stagnic Cambisol to Stagnosol from temperate grassland in Germany. These were filtered to <450 nm, and divided into three procedurally defined fractions: small-sized colloids (20–450 nm), nano-sized colloids (1–20 nm), and “dissolved P” (<1 nm), using asymmetric flow 10 field-flow fractionation (AF4), as well as filtration for solution 31P-nuclear magnetic resonance (NMR) spectroscopy. The total P of soil water extracts increased in the order CambisolStagnic Cambisol>Stagnosol. Across all 20 soil types, elevated proportions of inositol hexakisphosphate (IHP) species (e.g., myo-, scyllo- and D-chiro-IHP) were associated with soil mineral particles (i.e., bulk soil and small-sized soil colloids), whereas other orthophosphate monoesters and phosphonates were found in the “dissolved” 25 P fraction. We conclude that P species composition varies among colloidal and “dissolved” soil fractions after characterization using advanced techniques, i.e., AF4 and NMR. Furthermore, stagnic properties affect P speciation and availability by potentially releasing dissolved inorganic and esterbound P forms as well as nano-sized organic matter–Fe/Al–P 30 colloids.
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700 1 _ |a Klumpp, Erwin
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700 1 _ |a Cade-Menun, Barbara J.
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700 1 _ |a Bol, Roland
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700 1 _ |a Nischwitz, Volker
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700 1 _ |a Willbold, Sabine
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700 1 _ |a Vereecken, Harry
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700 1 _ |a Bauke, Sara L.
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700 1 _ |a Amelung, Wulf
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787 0 _ |a Jiang, X.; Klumpp, E.; Cade-Menun, B. J.; Bol, R.; Nischwitz, V.; Willbold, S.; Vereecken, H.; Bauke, S. L.; Amelung, W.
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|t Colloid-bound and dissolved phosphorus species in topsoil water extracts along a grassland transect from Cambisol to Stagnosol
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|d Biogeosciences, Copernicus, 2017
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