Linking transport pathways and phosphorus distribution in a loamy soil: a case study from a North-Eastern German Stagnosol
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Published:2023-07-12
Issue:8
Volume:195
Page:
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ISSN:0167-6369
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Container-title:Environmental Monitoring and Assessment
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language:en
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Short-container-title:Environ Monit Assess
Author:
Koch Stefan,Lederer Henrike,Kahle Petra,Lennartz Bernd
Abstract
AbstractHeterogeneous flow pathways through the soil determine the transport of dissolved and particle-bound nutritional elements like phosphorus (P) to ground and surface waters. This study was designed to understand the spatial patterns of P in agriculturally used soils and the mechanisms causing P accumulation and depletion at the centimetre scale. We conducted dye tracer experiments using Brilliant Blue on a loamy Stagnosol in North-Eastern-Germany. The plant-available P was analysed using double lactate extraction (DL-P). The plant-available P content of the topsoil was significantly higher than that of the subsoil in all three replicates (p < 0.001). The topsoil’s stained areas showed significantly higher P contents than unstained areas (p < 0.05), while the opposite was found for the subsoil. The P content varied enormously across all observed soil profiles (4 to 112 mg P kg−1 soil) and different categories of flow patterns (matrix flow, flow fingers, macropore flow, and no visible transport pathways). The P contents of these transport pathways differed significantly and followed the order: Pmatrix flow > Pfinger flow > Pno visible transport pathways > Pmacropore flow. We conclude that P tends to accumulate along flow pathways in the topsoil in the observed fertilized and tilled mineral soil. In contrast, in the subsoil at a generally lower P level, P is depleted from the prominent macroporous flow domains.
Funder
Bundesministerium für Bildung und Forschung Universität Rostock
Publisher
Springer Science and Business Media LLC
Subject
Management, Monitoring, Policy and Law,Pollution,General Environmental Science,General Medicine
Reference72 articles.
1. Andersson, H., Bergström, L., Djodjic, F., Ulén, B., & Kirchmann, H. (2013). Topsoil and subsoil properties influence phosphorus leaching from four agricultural soils. Journal of Environmental Quality, 42(2), 455. https://doi.org/10.2134/jeq2012.0224 2. Andreini, M. S., & Steenhuis, T. S. (1990). Preferential paths of flow under conventional and conservation tillage. Geoderma, 46, 85–102. 3. Backnäs, S., Laine-Kaulio, H., & Kløve, B. (2012). Phosphorus forms and related soil chemistry in preferential flowpaths and the soil matrix of a forested podzolic till soil profile. Geoderma, 189–190, 50–64. https://doi.org/10.1016/j.geoderma.2012.04.016 4. Bauke, S. L., von Sperber, C., Siebers, N., Tamburini, F., & Amelung, W. (2017). Biopore effects on phosphorus biogeochemistry in subsoils. Soil Biology & Biochemistry, 111, 157–165. https://doi.org/10.1016/j.soilbio.2017.04.012 5. Bol, R., Julich, D., Brödlin, D., Siemens, J., Kaiser, K., Dippold, M. A., Spielvogel, S., Zilla, T., Mewes, D., von Blanckenburg, F., Puhlmann, H., Holzmann, S., Weiler, M., Amelung, W., Lang, F., Kuzyakov, Y., Feger, K. H., Gottselig, N., Klumpp, E., … Hagedorn, F. (2016). Dissolved and colloidal phosphorus fluxes in forest ecosystems—an almost blind spot in ecosystem research. Journal of Plant Nutrition and Soil Science, 179(4), 425–438. https://doi.org/10.1002/jpln.201600079
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