Details
| Original language | English |
|---|---|
| Pages (from-to) | 401-408 |
| Number of pages | 8 |
| Journal | Journal of Plant Nutrition and Soil Science |
| Volume | 161 |
| Issue number | 4 |
| Publication status | Published - 1998 |
| Externally published | Yes |
Abstract
Field and laboratory studies combined with destructive and non-destructive analytical methods were used to characterize dissolved organic matter (DOM) in acid forest soils. DOM is produced in significant amounts in the forest canopy and in the forest floor. A major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. DOM released from the forest floor passes the upper mineral soil almost conservatively, whereas in the subsoil most DOM is removed from solution. Immobilization of DOM is mainly due to sorption on Fe and Al oxides. The highly oxidized lignin-derived moieties are preferentially removed from the soil solution whereas the saccharides are relatively enriched. We conclude that DOM in the forest soil output to the hydrosphere is a result of (1) the release of microbially degraded ligno-cellulose compounds and of microbial metabolites into the forest floor solution and (2) selective sorptive removal of the lignin-derived constituents in the subsoil.
Keywords
- DOM fractionation, DOM retention, Hydrophilic fraction, Hydrophobic fraction, Ligninolysis, Microbial degradation
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Journal of Plant Nutrition and Soil Science, Vol. 161, No. 4, 1998, p. 401-408.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mobilization and immobilization of dissolved organic matter in forest soils
AU - Guggenberger, Georg
AU - Kaiser, Klaus
AU - Zech, Wolfgang
PY - 1998
Y1 - 1998
N2 - Field and laboratory studies combined with destructive and non-destructive analytical methods were used to characterize dissolved organic matter (DOM) in acid forest soils. DOM is produced in significant amounts in the forest canopy and in the forest floor. A major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. DOM released from the forest floor passes the upper mineral soil almost conservatively, whereas in the subsoil most DOM is removed from solution. Immobilization of DOM is mainly due to sorption on Fe and Al oxides. The highly oxidized lignin-derived moieties are preferentially removed from the soil solution whereas the saccharides are relatively enriched. We conclude that DOM in the forest soil output to the hydrosphere is a result of (1) the release of microbially degraded ligno-cellulose compounds and of microbial metabolites into the forest floor solution and (2) selective sorptive removal of the lignin-derived constituents in the subsoil.
AB - Field and laboratory studies combined with destructive and non-destructive analytical methods were used to characterize dissolved organic matter (DOM) in acid forest soils. DOM is produced in significant amounts in the forest canopy and in the forest floor. A major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. DOM released from the forest floor passes the upper mineral soil almost conservatively, whereas in the subsoil most DOM is removed from solution. Immobilization of DOM is mainly due to sorption on Fe and Al oxides. The highly oxidized lignin-derived moieties are preferentially removed from the soil solution whereas the saccharides are relatively enriched. We conclude that DOM in the forest soil output to the hydrosphere is a result of (1) the release of microbially degraded ligno-cellulose compounds and of microbial metabolites into the forest floor solution and (2) selective sorptive removal of the lignin-derived constituents in the subsoil.
KW - DOM fractionation
KW - DOM retention
KW - Hydrophilic fraction
KW - Hydrophobic fraction
KW - Ligninolysis
KW - Microbial degradation
UR - http://www.scopus.com/inward/record.url?scp=0000202201&partnerID=8YFLogxK
U2 - 10.1002/jpln.1998.3581610408
DO - 10.1002/jpln.1998.3581610408
M3 - Article
AN - SCOPUS:0000202201
VL - 161
SP - 401
EP - 408
JO - Journal of Plant Nutrition and Soil Science
JF - Journal of Plant Nutrition and Soil Science
SN - 1436-8730
IS - 4
ER -