Four soil phosphorus (P) tests evaluated by plant P uptake and P balancing in the Ultuna long-term field experiment

Klaus A. Jarosch, Jakob Santner, Mohammed Masud Parvage, Martin Hubert Gerzabek, Franz Zehetner and Holger Kirchmann
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Klaus A. Jarosch: Group of Soil Science, Geographical Institute, University Bern, Bern, Switzerland
Jakob Santner: Instituteof Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
Mohammed Masud Parvage: Department of Soil and Environment, Swedish University of Agricultural Sciences,
Martin Hubert Gerzabek: Instituteof Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
Franz Zehetner: Instituteof Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
Holger Kirchmann: Department of Soil and Environment, Swedish University of Agricultural Sciences,

Plant, Soil and Environment, 2018, vol. 64, issue 9, 441-447

Abstract: Soil phosphorus (P) availability was assessed with four different soil P tests on seven soils of the Ultuna long-term field experiment (Sweden). These four soil P tests were (1) P-H2O (water extractable P); (2) P-H2OC10 (water extractable P upon 10 consecutive extractions); (3) P-AL (ammonium lactate extractable P) and (4) P-CDGT (P desorbable using diffusive gradients in thin films). The suitability of these soil P tests to predict P availability was assessed by correlation with plant P uptake (mean of preceding 11 years) and soil P balancing (input vs. output on plot level for a period of 54 years). The ability to predict these parameters was in the order P-H2OC10 > P-CDGT > P-H2O > P-AL. Thus, methods considering the P-resupply from the soil solid phase to soil solution performed clearly better than equilibrium-based extractions. Our findings suggest that the P-AL test, commonly used for P-fertilizer recommendations in Sweden, could not predict plant P uptake and the soil P balance in a satisfying way in the analysed soils.

Keywords: soil testing; macronutrient; phosphorus desorption; nutrition; fertilization; saturation index (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:64:y:2018:i:9:id:313-2018-pse

DOI: 10.17221/313/2018-PSE

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