Influence of change in land use on the refractory organic macromolecular fraction of a sandy spodosol (Landes de Gascogne, France)

Quénéa, Katell; Derenne, Sylvie; Largeau, Claude; Rumpel, Cornélia; Mariotti, André

doi:10.1016/j.geoderma.2006.03.018

Cited by 19 publications

(7 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, the 13 C NMR spectra confirmed aromatic enhancement in deforested soils (1‐OF and 1‐CC), in agreement with Nascimento et al (1992). Similar results were obtained by Quénéa et al. (2006), who reported an increase in the accumulation of the refractory organic macromolecular fraction in deforested soils under continuous maize crop, partly as a result of selective elimination of aliphatic constituents of plant biomass probably induced by agricultural use.…”

Section: Resultssupporting

confidence: 86%

Biogeochemical Proxies of Anthropic Impact in Mediterranean Forest Soils

Tinoco

Piedra-Buena

Zancada

et al. 2010

Soil Use and Management

View full text Add to dashboard Cite

Quantitative changes in soil organic matter (SOM) from undisturbed Mediterranean forests and neighbouring deforested sites were assessed by analysing soil lipids and humic acids (HAs), in total studying 80 variables. Changes in the composition of free lipids reflected vegetation types, whereas HAs analysed by visible and 13 C NMR spectroscopy, sodium perborate degradation and Curie-point pyrolysis indicated the extent of structural alteration of lignin in soil. The molecular fractions released by degradation techniques applied to HAs showed that demethoxylation and oxidation were associated with the removal of forest vegetation, and the aromatic compounds consisted mainly of methoxyphenols and benzenecarboxylic acids. Decreased concentration of alkanes and increased amounts of alcohols were observed after removal of forests. The chain lengths of alkyl compounds also tended to decrease. In forest soil, there was a series of diterpene resin acids, whereas in pasture soil steroids from animal origin and a root-derived triterpenoids with friedelan structure were found. In relation to the total quantity and quality of soil C, the overall chemical descriptors indicated that clearing and cultivation (semiarid cereal fields) lead to intense mineralization of SOM (mainly particulate, free organic matter) but the residual humic substances have enhanced maturity in terms of structural condensation and potential resilience. Conversely, the cleared forest soil under pasture had a comparatively higher potential for C sequestration, but the HA characteristics suggested selective preservation of plant biomacromolecules directly incorporated as underground biomass.

show abstract

Section: Resultssupporting

confidence: 86%

Biogeochemical Proxies of Anthropic Impact in Mediterranean Forest Soils

Tinoco

Piedra-Buena

Zancada

et al. 2010

Soil Use and Management

View full text Add to dashboard Cite

show abstract

“…The SOC fraction resistant to stepwise hydrolysis comprised 10–35% of the initial, mineral‐associated SOC. These proportions were larger than those reported in the < 10‐μm fraction of arable and forest soils (5–6% of initial SOC; Augris et al , 1998; Poirier et al , 2000, 2003), but comparable to quantities found in the topsoil of a sandy Spodosol in southwest France under pine forest (34% of initial SOC; Quénéa et al , 2005a,b) and maize cropping (20% of initial SOC; Quénéa et al , 2006).…”

Section: Discussionmentioning

confidence: 47%

“…stepwise hydrolysis using trifluoroacetic acid (TFA) and hydrochloric acid (HCl) (e.g. Poirier et al , 2003; Quénéa et al , 2006) or hydrolysis using HCl in a single step (e.g. Paul et al , 2001; Plante et al , 2006), oxidative treatments using several oxidants like hydrogen peroxide (H 2 O 2 ) (e.g.…”

Section: Introductionmentioning

confidence: 99%

Comparison of chemical fractionation methods for isolating stable soil organic carbon pools

Helfrich

Flessa

Mikutta

et al. 2007

European J Soil Science

167

138

View full text Add to dashboard Cite

Stable soil organic matter (SOM) is important for long-term sequestration of soil organic carbon (SOC), but the usefulness of different fractionation methods to isolate stable SOM is open to question. We assessed the suitability of five chemical fractionation methods (stepwise hydrolysis, treatment with H 2 O 2 , Na 2 S 2 O 8 , NaOCl, and demineralization of the NaOCl-resistant fraction (NaOCl þ HF)) to isolate stable SOM from soil samples of a loamy sand and a silty loam under different land use regimes (grassland, forest and arable crops). The apparent C turnover time and mean age of SOC before and after fractionation was determined by 13 C and 14 C analysis. Particulate organic matter was removed by density fractionation before soils were exposed to chemical fractionation. All chemical treatments induced large SOC losses of 62-95% of the mineral-associated SOC fraction. The amounts of H 2 O 2 -and Na 2 S 2 O 8 -resistant SOC were independent from land use, while those of NaOCl-(NaOCl þ HF)-and hydrolysis-resistant SOC were not. All chemical treatments caused a preferential removal of young, maize-derived SOC, with Na 2 S 2 O 8 and H 2 O 2 being most efficient. The mean 14 C age of SOC was 1000-10000 years greater after chemical fractionation than that of the initial, mineral-associated SOC and mean 14 C ages increased in the order: NaOCl < NaOCl þ HF stepwise hydrolysis ( H 2 O 2 % Na 2 S 2 O 8 . None of the methods appeared generally suitable for the determination of the inert organic matter pool of the Rothamsted Carbon Model. Nonetheless, our results indicate that all methods are able to isolate an older, more stable SOC fraction, but treatments with H 2 O 2 and Na 2 S 2 O 8 were the most efficient ones in isolating stable SOM.

show abstract

“…In addition, HCl hydrolysis might form condensed aromatic moieties as the ones typical for BC. Hydrolysis using TFA is usually applied to soils in order to circumvent this problem (Quénéa et al, 2006). However, for clayey tropical soils this method did not seem to yield satisfactory results, as carbon contamination could not be excluded (Table 3).…”

Section: Carbon Stabilisation In Tropical Soils On Strong Slopes Undementioning

confidence: 99%

Stabilisation of HF soluble and HCl resistant organic matter in sloping tropical soils under slash and burn agriculture

et al. 2008

Self Cite

View full text Add to dashboard Cite

Influence of change in land use on the refractory organic macromolecular fraction of a sandy spodosol (Landes de Gascogne, France)

Cited by 19 publications

References 69 publications

Biogeochemical Proxies of Anthropic Impact in Mediterranean Forest Soils

Biogeochemical Proxies of Anthropic Impact in Mediterranean Forest Soils

Comparison of chemical fractionation methods for isolating stable soil organic carbon pools

Stabilisation of HF soluble and HCl resistant organic matter in sloping tropical soils under slash and burn agriculture

Contact Info

Product

Resources

About