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Gewählte Publikation:

Jarosch, KA; Santner, J; Parvage, MM; Gerzabek, MH; Zehetner, F; Kirchmann, H.
(2018): Four soil phosphorus (P) tests evaluated by plant P uptake and P balancing in the Ultuna long-term field experiment
PLANT SOIL ENVIRON. 2018; 64(9): 441-447. FullText FullText_BOKU

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-C-DGT (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-C-DGT > 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.
Autor/innen der BOKU Wien:
Gerzabek Martin
Santner Jakob
Zehetner Franz
BOKU Gendermonitor:


Find related publications in this database (Keywords)
soil testing
macronutrient
phosphorus desorption
nutrition
fertilization
saturation index


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