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Research article2000Peer reviewed

Temporal and spatial variations of phosphorus losses and drainage in a structured clay soil

Djodjic, F; Ulen, B; Bergstrom, L

Abstract

Drainage discharge and loss of dissolved (PO4-P)and particulate (part-P) P from four artificially drained plots with clay soils were studied over a four-year period. The loads of total P observed during this time ranged from 421 g P ha(-1) to 805 g P ha(-1). Annual losses and losses during high-flow events were measured. Leaching of P occurred episodically with the largest losses during high-flow events. Concentrations of PO4-P during high-how events were positively related to discharge rates and the curves obtained were grouped into two classes based on similar slopes within the class. Concentrations of part-P were related to concentrations of suspended soil material, and increased with increasing discharge rate, but the slope of the curves obtained varied over a wide range. High P concentrations were observed in high-flow episodes which occurred after P fertilizer applications. (C) 2000 Elsevier Science Ltd. All rights reserved.

Keywords

drainage discharge; dissolved phosphorus; particulate phosphorus; suspended material

Published in

Water Research
2000, Volume: 34, number: 5, pages: 1687-1695

      SLU Authors

    • Djodjic, Faruk

      • Department of Soil Sciences, Swedish University of Agricultural Sciences

      • Ulen, Barbro

        • Department of Soil Sciences, Swedish University of Agricultural Sciences

        • Bergström, Lars

          • Department of Soil Sciences, Swedish University of Agricultural Sciences

        Associated SLU-program

        Agricultural landscape

        UKÄ Subject classification

        Environmental Sciences

        Publication identifier

        DOI: https://doi.org/10.1016/S0043-1354(99)00312-7

        Permanent link to this page (URI)

        https://res.slu.se/id/publ/84975