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| Hauptseite > Publikationsdatenbank > Forest Soil Colloids Enhance Delivery of Phosphorus Into a Diffusive Gradient in Thin Films (DGT) Sink > print |
| Hauptseite > Publikationsdatenbank > Forest Soil Colloids Enhance Delivery of Phosphorus Into a Diffusive Gradient in Thin Films (DGT) Sink > print |
| 001 | 890527 | ||
| 005 | 20210623133400.0 | ||
| 024 | 7 | _ | |a 10.3389/ffgc.2020.577364 |2 doi |
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| 100 | 1 | _ | |a Konrad, Alexander |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Forest Soil Colloids Enhance Delivery of Phosphorus Into a Diffusive Gradient in Thin Films (DGT) Sink |
| 260 | _ | _ | |a Lausanne |c 2021 |b Frontiers Media |
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| 520 | _ | _ | |a Phosphorus (P) is preferentially bound to colloids in soil. On the one hand, colloids may facilitate soil P leaching leading to a decrease of plant available P, but on the other hand they can carry P to plant roots, thus supporting the P uptake of plants. We tested the magnitude and the kinetics of P delivery by colloids into a P sink mimicking plant roots using the Diffusive Gradients in Thin-Films (DGT) technique. Colloids were extracted with water from three forest soils differing in parent material using a method based on dispersion and sedimentation. Freeze-dried colloids, the respective bulk soil, and the colloid-free extraction residue were sterilized and mixed with quartz sand and silt to an equal P basis. The mixtures were wetted and the diffusive fluxes of P into the DGTs were measured under sterile, water unsaturated conditions. The colloids extracted from a P-poor sandy podzolic soil were highly enriched in iron and organic matter compared to the bulk soil and delivered more P at a higher rate into the sink compared to bulk soil and the colloid-free soil extraction residue. However, colloidal P delivery into the sink was smaller than P release and transport from the bulk soil developed on dolomite rock, and with no difference for a soil with intermediate phosphorus-stocks developed from gneiss. Our results provide evidence that both the mobility of colloids and their P binding strength control their contribution to the plant available P-pool of soils. Overall, our findings highlight the relevance of colloids for P delivery to plant roots. |
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| 773 | _ | _ | |a 10.3389/ffgc.2020.577364 |g Vol. 3, p. 577364 |0 PERI:(DE-600)2968523-0 |p 577364 |t Frontiers in forests and global change |v 3 |y 2021 |x 2624-893X |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/890527/files/ffgc-03-577364.pdf |y OpenAccess |
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