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Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character
Controlled drainage is considered as a soil management tool to improve water supply to crops and reduce nutrient losses from fields; however, its closure may affect phosphorus (P) mobilization in soil. To assess the P mobilization potential, three soil profiles with redoximorphic features were selec...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Netherlands
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7518995/ https://www.ncbi.nlm.nih.gov/pubmed/32323172 http://dx.doi.org/10.1007/s10653-020-00561-y |
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author | Baumann, Karen Shaheen, Sabry M. Hu, Yongfeng Gros, Peter Heilmann, Elena Morshedizad, Mohsen Wang, Jianxu Wang, Shan-Li Rinklebe, Jörg Leinweber, Peter |
author_facet | Baumann, Karen Shaheen, Sabry M. Hu, Yongfeng Gros, Peter Heilmann, Elena Morshedizad, Mohsen Wang, Jianxu Wang, Shan-Li Rinklebe, Jörg Leinweber, Peter |
author_sort | Baumann, Karen |
collection | PubMed |
description | Controlled drainage is considered as a soil management tool to improve water supply to crops and reduce nutrient losses from fields; however, its closure may affect phosphorus (P) mobilization in soil. To assess the P mobilization potential, three soil profiles with redoximorphic features were selected along a slight hill in Northern Germany. Soil samples from three depths of each profile were characterized for basic properties, total element content, oxalate- and dithionite-extractable pedogenic Al, Fe and Mn (hydr)oxides, P pools (sequential extraction), P species [P K-edge X-ray absorption near-edge structure (XANES) spectroscopy] and P sorption behavior. In topsoil (~ 10 cm depth), labile P (H(2)O-P + resin-P + NaHCO(3)-P) accounted for 26–32% of total P (P(t)). Phosphorus K-edge XANES revealed that up to 49% of P(t) was bound to Al and/or Fe (hydr)oxides, but sequential fractionation indicated that > 30% of this P was occluded within sesquioxide aggregates. A low binding capacity for P was demonstrated by P sorption capacity and low K(f) coefficients (20–33 [Formula: see text] ) of the Freundlich equation. In the subsoil layers (~ 30 and ~ 65 cm depth), higher proportions of Al- and Fe-bound P along with other characteristics suggested that all profiles might be prone to P mobilization/leaching risk under reducing conditions even if the degree of P saturation (DPS) of a profile under oxic conditions was < 25%. The results suggest that a closure of the controlled drainage may pose a risk of increased P mobilization, but this needs to be compared with the risk of uncontrolled drainage and P losses to avoid P leaching into the aquatic ecosystem. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s10653-020-00561-y) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-7518995 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-75189952020-10-13 Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character Baumann, Karen Shaheen, Sabry M. Hu, Yongfeng Gros, Peter Heilmann, Elena Morshedizad, Mohsen Wang, Jianxu Wang, Shan-Li Rinklebe, Jörg Leinweber, Peter Environ Geochem Health Original Paper Controlled drainage is considered as a soil management tool to improve water supply to crops and reduce nutrient losses from fields; however, its closure may affect phosphorus (P) mobilization in soil. To assess the P mobilization potential, three soil profiles with redoximorphic features were selected along a slight hill in Northern Germany. Soil samples from three depths of each profile were characterized for basic properties, total element content, oxalate- and dithionite-extractable pedogenic Al, Fe and Mn (hydr)oxides, P pools (sequential extraction), P species [P K-edge X-ray absorption near-edge structure (XANES) spectroscopy] and P sorption behavior. In topsoil (~ 10 cm depth), labile P (H(2)O-P + resin-P + NaHCO(3)-P) accounted for 26–32% of total P (P(t)). Phosphorus K-edge XANES revealed that up to 49% of P(t) was bound to Al and/or Fe (hydr)oxides, but sequential fractionation indicated that > 30% of this P was occluded within sesquioxide aggregates. A low binding capacity for P was demonstrated by P sorption capacity and low K(f) coefficients (20–33 [Formula: see text] ) of the Freundlich equation. In the subsoil layers (~ 30 and ~ 65 cm depth), higher proportions of Al- and Fe-bound P along with other characteristics suggested that all profiles might be prone to P mobilization/leaching risk under reducing conditions even if the degree of P saturation (DPS) of a profile under oxic conditions was < 25%. The results suggest that a closure of the controlled drainage may pose a risk of increased P mobilization, but this needs to be compared with the risk of uncontrolled drainage and P losses to avoid P leaching into the aquatic ecosystem. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s10653-020-00561-y) contains supplementary material, which is available to authorized users. Springer Netherlands 2020-04-23 2020 /pmc/articles/PMC7518995/ /pubmed/32323172 http://dx.doi.org/10.1007/s10653-020-00561-y Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Original Paper Baumann, Karen Shaheen, Sabry M. Hu, Yongfeng Gros, Peter Heilmann, Elena Morshedizad, Mohsen Wang, Jianxu Wang, Shan-Li Rinklebe, Jörg Leinweber, Peter Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title | Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title_full | Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title_fullStr | Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title_full_unstemmed | Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title_short | Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
title_sort | speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character |
topic | Original Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7518995/ https://www.ncbi.nlm.nih.gov/pubmed/32323172 http://dx.doi.org/10.1007/s10653-020-00561-y |
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