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Plantetilgjengelig fosfor i avløpsslam - Testing av analysemetodikk for tilgjengelig fosfor

Authors: Øgaard, Anne K. Falk;

Plantetilgjengelig fosfor i avløpsslam - Testing av analysemetodikk for tilgjengelig fosfor

Abstract

Planteopptak av fosfor fra 12 ulike slamtyper er testet i potteforsøk og sammenlignet med fosforopptak fra mineralfosfor. Effektiviteten av fosfor i de ulike slamtypene varierte fra 12 til 39 % av mineralfosfor, beregnet fra sum fosforopptak i 6 høstinger av raigras. Sju ulike fosforekstraksjoner er testet mot fosforopptaket i raigras (P-AL, to ulike modifikasjoner av P-AL, oksalatløselig fosfor, Olsen P, vannløselig fosfor og fosfor ekstrahert med ionebytter (Fe-strips)). Standard P-AL metode viste dårlig sammenheng med fosforopptaket. Best sammenheng med fosforopptaket i plantene ga ekstraksjon med ionebytter (Fe-strips). Uten slammet med pH >11, forklarte fosfor ekstrahert med Fe-strips 67 % av variasjonen i fosforopptak. Fosforopptaket fra slammet hadde nær sammenheng med konsentrasjonen av fellingskjemikalier i slammet. Summen av jern og aluminium på molbasis, med halv vekt på jern forklarte 83 % av fosforopptaket i raigras.

Country
Norway
Keywords

VDP::Landbruks- og Fiskerifag: 900::Landbruksfag: 910::Jordfag: 913, Fosfor, fosforanalyser, avløpsslam, plantetilgjengelighet

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green