Article (Scientific journals)
Degree of phosphorus saturation in agricultural loamy soils with a near-neutral pH
Renneson, Malorie; Vandenberghe, Christophe; Dufey, Joseph et al.
2015In European Journal of Soil Science, 66, p. 33-41
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Keywords :
phosphorus; degree of phosphorus saturation; soil; fertility; indicator
Abstract :
[en] The degree of phosphorus saturation (DPS) represents the ratio of sorbed phosphorus (P) to the P sorption capacity (PSC) of soils. In some countries, DPS is used to evaluate the risk of P loss and surface water eutrophication. This study investigated DPS measurement and prediction in neutral loamy soils fromWallonia, Belgium. A total of 57 agricultural topsoil samples subject to diverse P management were evaluated. No satisfactory relationship could be found between PSC determined by a one-point short-term isotherm in the laboratory and the sum of aluminium and iron extracted by oxalate (Alox +Feox). The equation PSC=a Alox +b pHw appeared to be more appropriate for estimating PSC in the soils studied. These soils had a near-neutral pH, and P fixation processes linked to the presence of calcium ions or carbonates were important. Comparisons of DPS with soil-test P and water-extracted P suggested that DPS could be a useful agronomic and/or environmental indicator. Our results also showed that DPS values between 20 and 30% corresponded to the agronomic optimum of soil P content. Consequently, DPS may be used as an indicator of P status in neutral soils, provided that the PSC assessment is adapted to the local soil characteristics.
Disciplines :
Agriculture & agronomy
Environmental sciences & ecology
Earth sciences & physical geography
Author, co-author :
Renneson, Malorie ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Vandenberghe, Christophe ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Dufey, Joseph
Marcoen, Jean Marie ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Bock, Laurent ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Colinet, Gilles  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Language :
English
Title :
Degree of phosphorus saturation in agricultural loamy soils with a near-neutral pH
Alternative titles :
[fr] Le degré de saturation en phosphore dans les sols agricoles limoneux avec un pH proche de la neutralité
Publication date :
January 2015
Journal title :
European Journal of Soil Science
ISSN :
1351-0754
eISSN :
1365-2389
Publisher :
Blackwell Publishing
Volume :
66
Pages :
33-41
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 17 December 2014

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