Reference : Degree of phosphorus saturation in agricultural loamy soils with a near-neutral pH
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Life sciences : Environmental sciences & ecology
Life sciences : Agriculture & agronomy
http://hdl.handle.net/2268/175214
Degree of phosphorus saturation in agricultural loamy soils with a near-neutral pH
English
[fr] Le degré de saturation en phosphore dans les sols agricoles limoneux avec un pH proche de la neutralité
Renneson, Malorie [Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau >]
Vandenberghe, Christophe mailto [Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau >]
Dufey, Joseph [> >]
Marcoen, Jean Marie mailto [Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau >]
Bock, Laurent mailto [Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau >]
Colinet, Gilles mailto [Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau >]
Jan-2015
European Journal of Soil Science
Blackwell Publishing
66
33-41
Yes (verified by ORBi)
International
1351-0754
[en] phosphorus ; degree of phosphorus saturation ; soil ; fertility ; indicator
[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.
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Researchers ; Professionals
http://hdl.handle.net/2268/175214
10.1111/ejss.12207

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