Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character
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ORIGINAL PAPER
Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character Karen Baumann . Sabry M. Shaheen . Yongfeng Hu . Peter Gros . Elena Heilmann . Mohsen Morshedizad . Jianxu Wang . Shan-Li Wang . Jo¨rg Rinklebe . Peter Leinweber
Received: 19 December 2019 / Accepted: 4 April 2020 Ó The Author(s) 2020
Abstract 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 Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10653-020-00561-y) contains supplementary material, which is available to authorized users. K. Baumann (&) P. Gros E. Heilmann M. Morshedizad P. Leinweber Soil Sciences, Faculty for Agriculture and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18051 Rostock, Germany e-mail: [email protected] S. M. Shaheen J. Wang J. Rinklebe Laboratory of Soil- and Groundwater-Management, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, University of Wuppertal, Pauluskirchstraße 7, 42285 Wuppertal, Germany S. M. Shaheen Department of Soil and Water Sciences, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt
(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 (H2O-P ? resinP ? NaHCO3-P) accounted for 26–32% of total P (Pt). Phosphorus K-edge XANES revealed that up to 49% of Pt 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 Kf coefficients (20– 1 1nf nf 33 mg L kg ) of the Freundlich equation. In the subsoil layers (* 30 and * 65 cm depth), higher proportions of Al- and Fe-bound P along with other Y. Hu Canadian Light Source, University of Saskatchewan, Saskatoon, SK S7N 2V3, Canada J. Wang State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550082, People’s Republic of China S.-L. Wang Department of Agricultural Chemistry, National Taiwan University, 1 Sect. 4, Roosevelt Rd., Taipei 10617, Taiwan J. Rinklebe Department of Environment, Energy and Geoinformatics, University of Sejong, 98 Gunja-Dong, Guangjin-Gu, Seoul, Republic of Korea
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Environ Geochem Health
characteristics suggested that all profiles might be prone to P mobiliza
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