TRANSFORMATIONS OF PHOSPHORUS DURING INCUBATION OF BEECH LEAF-LITTER IN THE PRESENCE OF OXIDES

Citation
A. Miltner et al., TRANSFORMATIONS OF PHOSPHORUS DURING INCUBATION OF BEECH LEAF-LITTER IN THE PRESENCE OF OXIDES, European journal of soil science, 49(3), 1998, pp. 471-475
Citations number
23
Categorie Soggetti
Agriculture Soil Science
ISSN journal
13510754
Volume
49
Issue
3
Year of publication
1998
Pages
471 - 475
Database
ISI
SICI code
1351-0754(1998)49:3<471:TOPDIO>2.0.ZU;2-P
Abstract
Some minerals have large PO43- sorption capacities. However, we do not know how these mineral phases influence the speciation of organic P w hen organic matter decomposes. To characterize the interactions betwee n mineral phases and organic P species, we incubated mixtures of beech leaf Litter and Fe oxide, Al hydroxide, birnessite, and quartz sand. The samples were extracted with NaOH-NaF and analysed by P-31 nuclear magnetic resonance (NMR) spectroscopy. Phosphate mono- and diesters ga ve the most prominent signals in the P-31 NMR spectra. During incubati on, the proportion of the monoester P decreased, whereas that of the d iester P increased. Since NMR intensities assigned to teichoic acids i ncreased, it seems that microbial P accumulated during incubation. The synthesis of microbial compounds was strongest in the presence of Fe oxide. All mineral phases investigated gave rise to a resonance in the P-31 NMR spectra which was not present in the control treatment to wh ich the mineral phases had not been added. The resonance was tentative ly assigned to sugar diesters, which probably originated from organo-m ineral interactions.