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Correlation of extractable soil phosphorus (P) with plant P uptake: 14 extraction methods applied to 50 agricultural soils from Central Europe

Author

Listed:
  • Franz ZEHETNER

    (Institute of Soil Research, University of Natural Resources and Life Sciences, Vienna, Austria)

  • Rosemarie WUENSCHER

    (Institute of Soil Research, University of Natural Resources and Life Sciences, Vienna, Austria)

  • Robert PETICZKA

    (Department of Geography and Regional Research, University of Vienna, Vienna, Austria)

  • Hans UNTERFRAUNER

    (Technical Office Unterfrauner, Vienna, Austria)

Abstract

The aim of this study was to test different soil phosphorus (P) extraction methods in relation to plant P uptake. A greenhouse pot experiment was conducted with spring wheat. The soils were extracted with the following methods/extractants: H2O, CaCl2, LiCl, iron oxide impregnated filter papers (Fe-oxide Pi), Olsen, calcium-acetate-lactate (CAL), cation and anion exchange membranes (CAEM), Mehlich 3, Bray and Kurtz II (Bray II), citrate-bicarbonate-dithionite, organic P, HCl, acid ammonium oxalate, total P. Plant P uptake was in the range of the P extracted by neutral salt solutions (CaCl2, LiCl). P extracted with H2O, CaCl2 and CAEM correlated best with plant P uptake over one growing season, while several established soil P test methods, including CAL, Mehlich 3 and Bray II, did not show significant correlations. When grouping the soils according to pH, the weaker extraction methods (H2O, CaCl2, LiCl) showed significant correlations with plant P uptake only for the low and intermediate pH groups (pH in 1 mol/L KCl ≤ 6.6), while some of the stronger extraction methods (CAL, Mehlich 3, Bray II, dithionite, oxalate, total P) showed significant correlations only for the high pH group (> 6.6) comprised of calcareous soils. It was concluded that weaker P extraction methods, especially neutral salt solutions best predict plant-available P in the short term. However, they do not perform well for calcareous (and clayey) soils and do not account for P that may become available beyond one growing season.

Suggested Citation

  • Franz ZEHETNER & Rosemarie WUENSCHER & Robert PETICZKA & Hans UNTERFRAUNER, 2018. "Correlation of extractable soil phosphorus (P) with plant P uptake: 14 extraction methods applied to 50 agricultural soils from Central Europe," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(4), pages 192-201.
    • Handle: RePEc:caa:jnlpse:v:64:y:2018:i:4:id:70-2018-pse
    DOI: 10.17221/70/2018-PSE
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    References listed on IDEAS

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    1. R. Wuenscher & H. Unterfrauner & R. Peticzka & F. Zehetner, 2015. "A comparison of 14 soil phosphorus extraction methods applied to 50 agricultural soils from Central Europe," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 61(2), pages 86-96.
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    Cited by:

    1. Klaus A. JAROSCH & Jakob SANTNER & Mohammed Masud PARVAGE & Martin Hubert GERZABEK & Franz ZEHETNER & Holger KIRCHMANN, 2018. "Four soil phosphorus (P) tests evaluated by plant P uptake and P balancing in the Ultuna long-term field experiment," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(9), pages 441-447.

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