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Composition of organic matter in sandy relict and cultivated heathlands as examined by pyrolysis-field ionization MS

Steven Sleutel UGent, Peter Leinweber, Shamim Ara Begum UGent, MD Abdul Kader UGent, Patric Van Oostveldt UGent and Stefaan De Neve UGent (2008) BIOGEOCHEMISTRY. 89(2). p.253-271
abstract
Unusually high SOC levels have been reported for sandy cropland soils in North-Western Europe. A potential link with their general heathland land-use history was investigated by comparing two soil pairs of relict heathland and cultivated former heathland in the Belgian sandy region. A sequential chemical fractionation yielded similar sizes in corresponding SOM fractions between the heathland and cropland soils (i.e. NaOCl resistant: 12.3-15.0 g C kg(-1) and NaOCl + HF resistant: 2.6-5.3 g C kg(-1)). Higher amounts of clay sized N in the cropland plots can be attributed to N additions from mineral fertilizers and animal manure. Temperature resolved Pyrolysis Field Ionization Mass Spectroscopy analysis showed that the composition of both relict heathland and cultivated soils was surprisingly similar, in spite of over 60 years of intense cropland management. The mass spectra of SOM in both heathland-cropland soil pairs investigated was dominated by signals from lipids, alkylaromatics and sterols. The accumulation of this SOM rich in aliphatics was logically linked to the high input of lipids, long-chain aliphatics and sterols from heathland vegetation and the low soil pH and microbial activity. Based on the relatively high OC surface loadings of HF-extractable OM (13-44 mg C m(-2) Fe and 1.2-2.3 mg C m(-2) clay), direct organo-mineral bonds between OM and Fe-oxides or clay minerals seem to be only partly involved as a stabilization mechanism in these soils. The distinct bimodal shape of the thermograms indicates that OM-crosslinking could furthermore contribute substantially to SOM stabilization in these soils. This study therefore corroborates the previously proposed view that lipids may be bound in networks of alkylaromatics, the structural building blocks of OM macromolecules. We hypothesize that such binding is able to explain the measured retention of these OM components, even under several decades of cropland management.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
heathland, soil organic matter, analytical pyrolysis, chemical fractionation, land-use, PARTICLE-SIZE FRACTIONS, RAY PHOTOELECTRON-SPECTROSCOPY, HEATHER CALLUNA-VULGARIS, FINE-CLAY FRACTIONS, ACID FOREST SOILS, MASS-SPECTROMETRY, HUMIC SUBSTANCES, ARABLE SOILS, CHEMICAL CHARACTERIZATION, AGRICULTURAL SOILS
journal title
BIOGEOCHEMISTRY
Biogeochemistry
volume
89
issue
2
pages
253 - 271
Web of Science type
Article
Web of Science id
000257913300008
JCR category
GEOSCIENCES, MULTIDISCIPLINARY
JCR impact factor
2.961 (2008)
JCR rank
18/143 (2008)
JCR quartile
1 (2008)
ISSN
0168-2563
DOI
10.1007/s10533-008-9217-4
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
705408
handle
http://hdl.handle.net/1854/LU-705408
date created
2009-06-19 13:55:54
date last changed
2009-06-30 14:39:56
@article{705408,
  abstract     = {Unusually high SOC levels have been reported for sandy cropland soils in North-Western Europe. A potential link with their general heathland land-use history was investigated by comparing two soil pairs of relict heathland and cultivated former heathland in the Belgian sandy region. A sequential chemical fractionation yielded similar sizes in corresponding SOM fractions between the heathland and cropland soils (i.e. NaOCl resistant: 12.3-15.0 g C kg(-1) and NaOCl + HF resistant: 2.6-5.3 g C kg(-1)). Higher amounts of clay sized N in the cropland plots can be attributed to N additions from mineral fertilizers and animal manure. Temperature resolved Pyrolysis Field Ionization Mass Spectroscopy analysis showed that the composition of both relict heathland and cultivated soils was surprisingly similar, in spite of over 60 years of intense cropland management. The mass spectra of SOM in both heathland-cropland soil pairs investigated was dominated by signals from lipids, alkylaromatics and sterols. The accumulation of this SOM rich in aliphatics was logically linked to the high input of lipids, long-chain aliphatics and sterols from heathland vegetation and the low soil pH and microbial activity. Based on the relatively high OC surface loadings of HF-extractable OM (13-44 mg C m(-2) Fe and 1.2-2.3 mg C m(-2) clay), direct organo-mineral bonds between OM and Fe-oxides or clay minerals seem to be only partly involved as a stabilization mechanism in these soils. The distinct bimodal shape of the thermograms indicates that OM-crosslinking could furthermore contribute substantially to SOM stabilization in these soils. This study therefore corroborates the previously proposed view that lipids may be bound in networks of alkylaromatics, the structural building blocks of OM macromolecules. We hypothesize that such binding is able to explain the measured retention of these OM components, even under several decades of cropland management.},
  author       = {Sleutel, Steven and Leinweber, Peter and Begum, Shamim Ara and Kader, MD Abdul and Van Oostveldt, Patric and De Neve, Stefaan},
  issn         = {0168-2563},
  journal      = {BIOGEOCHEMISTRY},
  keyword      = {heathland,soil organic matter,analytical pyrolysis,chemical fractionation,land-use,PARTICLE-SIZE FRACTIONS,RAY PHOTOELECTRON-SPECTROSCOPY,HEATHER CALLUNA-VULGARIS,FINE-CLAY FRACTIONS,ACID FOREST SOILS,MASS-SPECTROMETRY,HUMIC SUBSTANCES,ARABLE SOILS,CHEMICAL CHARACTERIZATION,AGRICULTURAL SOILS},
  language     = {eng},
  number       = {2},
  pages        = {253--271},
  title        = {Composition of organic matter in sandy relict and cultivated heathlands as examined by pyrolysis-field ionization MS},
  url          = {http://dx.doi.org/10.1007/s10533-008-9217-4},
  volume       = {89},
  year         = {2008},
}

Chicago
Sleutel, Steven, Peter Leinweber, Shamim Ara Begum, MD Abdul Kader, Patric Van Oostveldt, and Stefaan De Neve. 2008. “Composition of Organic Matter in Sandy Relict and Cultivated Heathlands as Examined by Pyrolysis-field Ionization MS.” Biogeochemistry 89 (2): 253–271.
APA
Sleutel, S., Leinweber, P., Begum, S. A., Kader, M. A., Van Oostveldt, P., & De Neve, S. (2008). Composition of organic matter in sandy relict and cultivated heathlands as examined by pyrolysis-field ionization MS. BIOGEOCHEMISTRY, 89(2), 253–271.
Vancouver
1.
Sleutel S, Leinweber P, Begum SA, Kader MA, Van Oostveldt P, De Neve S. Composition of organic matter in sandy relict and cultivated heathlands as examined by pyrolysis-field ionization MS. BIOGEOCHEMISTRY. 2008;89(2):253–71.
MLA
Sleutel, Steven, Peter Leinweber, Shamim Ara Begum, et al. “Composition of Organic Matter in Sandy Relict and Cultivated Heathlands as Examined by Pyrolysis-field Ionization MS.” BIOGEOCHEMISTRY 89.2 (2008): 253–271. Print.