Release of phosphorus under reducing and simulated open drainage conditions from overfertilised soils

R Scalenghe*, A.C. Edwards, E Barberis, F. Ajmone-Marsan

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Does removal of cations from soil solution during soil reduction stimulate phosphorus (P) release? An ion-exchange resin system was employed to provide a sink during the incubation of twelve soils under fully reducing conditions. This experimental design was considered to better simulate the loss of ions likely to occur under field conditions than more routine batch type closed extraction systems where solutes build-up in the extract solution. The small solute concentrations that remain in the equilibrating solution suggest the mixed resin system acted as an effective sink over the whole experimental period. By maintaining a small P concentration the resin system mimics soil drainage conditions and encourages P release from soil. Measurement of soil P forms by sequential extraction after the incubation period indicated an increase in the amorphous forms present. Here we show that even if the P-containing solution is retained by the soil, the potential for a subsequent P loss is increased under aerobic conditions. The management of drainage systems should try and avoid the onset of anaerobic conditions. Eventually, magnesium- and calcium-based precipitation products could recapture P from drains recycling it in topsoils as fertilizer. © 2013 Elsevier Ltd.
Original languageEnglish
Pages (from-to)289-294
Number of pages6
JournalChemosphere
Volume95
DOIs
Publication statusPrint publication - Jan 2014

Fingerprint

drainage
phosphorus
resin
soil
solute
incubation
soil drainage
oxic conditions
experimental design
anoxic conditions
topsoil
drain
magnesium
ion exchange
recycling
cation
calcium
fertilizer
ion
loss

Keywords

  • Anaerobic conditions
  • Anoxic
  • HCO3
  • Mixed resins

Cite this

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title = "Release of phosphorus under reducing and simulated open drainage conditions from overfertilised soils",
abstract = "Does removal of cations from soil solution during soil reduction stimulate phosphorus (P) release? An ion-exchange resin system was employed to provide a sink during the incubation of twelve soils under fully reducing conditions. This experimental design was considered to better simulate the loss of ions likely to occur under field conditions than more routine batch type closed extraction systems where solutes build-up in the extract solution. The small solute concentrations that remain in the equilibrating solution suggest the mixed resin system acted as an effective sink over the whole experimental period. By maintaining a small P concentration the resin system mimics soil drainage conditions and encourages P release from soil. Measurement of soil P forms by sequential extraction after the incubation period indicated an increase in the amorphous forms present. Here we show that even if the P-containing solution is retained by the soil, the potential for a subsequent P loss is increased under aerobic conditions. The management of drainage systems should try and avoid the onset of anaerobic conditions. Eventually, magnesium- and calcium-based precipitation products could recapture P from drains recycling it in topsoils as fertilizer. {\circledC} 2013 Elsevier Ltd.",
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author = "R Scalenghe and A.C. Edwards and E Barberis and F. Ajmone-Marsan",
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Release of phosphorus under reducing and simulated open drainage conditions from overfertilised soils. / Scalenghe, R; Edwards, A.C.; Barberis, E; Ajmone-Marsan, F.

In: Chemosphere, Vol. 95, 01.2014, p. 289-294.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Release of phosphorus under reducing and simulated open drainage conditions from overfertilised soils

AU - Scalenghe, R

AU - Edwards, A.C.

AU - Barberis, E

AU - Ajmone-Marsan, F.

PY - 2014/1

Y1 - 2014/1

N2 - Does removal of cations from soil solution during soil reduction stimulate phosphorus (P) release? An ion-exchange resin system was employed to provide a sink during the incubation of twelve soils under fully reducing conditions. This experimental design was considered to better simulate the loss of ions likely to occur under field conditions than more routine batch type closed extraction systems where solutes build-up in the extract solution. The small solute concentrations that remain in the equilibrating solution suggest the mixed resin system acted as an effective sink over the whole experimental period. By maintaining a small P concentration the resin system mimics soil drainage conditions and encourages P release from soil. Measurement of soil P forms by sequential extraction after the incubation period indicated an increase in the amorphous forms present. Here we show that even if the P-containing solution is retained by the soil, the potential for a subsequent P loss is increased under aerobic conditions. The management of drainage systems should try and avoid the onset of anaerobic conditions. Eventually, magnesium- and calcium-based precipitation products could recapture P from drains recycling it in topsoils as fertilizer. © 2013 Elsevier Ltd.

AB - Does removal of cations from soil solution during soil reduction stimulate phosphorus (P) release? An ion-exchange resin system was employed to provide a sink during the incubation of twelve soils under fully reducing conditions. This experimental design was considered to better simulate the loss of ions likely to occur under field conditions than more routine batch type closed extraction systems where solutes build-up in the extract solution. The small solute concentrations that remain in the equilibrating solution suggest the mixed resin system acted as an effective sink over the whole experimental period. By maintaining a small P concentration the resin system mimics soil drainage conditions and encourages P release from soil. Measurement of soil P forms by sequential extraction after the incubation period indicated an increase in the amorphous forms present. Here we show that even if the P-containing solution is retained by the soil, the potential for a subsequent P loss is increased under aerobic conditions. The management of drainage systems should try and avoid the onset of anaerobic conditions. Eventually, magnesium- and calcium-based precipitation products could recapture P from drains recycling it in topsoils as fertilizer. © 2013 Elsevier Ltd.

KW - Anaerobic conditions

KW - Anoxic

KW - HCO3

KW - Mixed resins

U2 - 10.1016/j.chemosphere.2013.09.016

DO - 10.1016/j.chemosphere.2013.09.016

M3 - Article

VL - 95

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JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -