TY  - JOUR
AU  - Missong, Anna
AU  - Bol, Roland
AU  - Willbold, Sabine
AU  - Klumpp, Erwin
AU  - Siemens, Jan
TI  - Phosphorus forms in forest soil colloids as revealed by liquid-state 31P-NMR
JO  - Journal of plant nutrition and soil science
VL  - 179
IS  - 2
SN  - 0044-3263
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2016-01739
SP  - 159–167
PY  - 2016
AB  - Nanoparticles and colloids affect the storage and hence the availability of P in forest ecosystems. We investigated the fine colloids present in forest soils and their association with inorganic and organic P. To differentiate between the different P forms, we performed liquid-state 31P-nucelar magnetic resonance (31P-NMR) measurements on forest bulk soil extracts, on colloid extracts and on the electrolyte phase of their soil suspensions. The 31P-NMR spectra indicated that soil nanoparticles and colloids were more enriched with organic than with inorganic P forms compared to the electrolyte phase. The P concentration was enriched in the colloidal fraction in comparison to the bulk soil and the phosphate diesters were more dominant in the colloidal fraction when compared to the bulk soil. The colloidal P-diester to P-monoester ratios were 2 to 3 times higher in the colloidal fraction than in the bulk soil. In contrast, relatively large percentages of inorganic P were found in the electrolyte phase
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000374035700004
DO  - DOI:10.1002/jpln.201500119
UR  - https://juser.fz-juelich.de/record/283057
ER  -