Response of bulk chemical composition, lignin and carbohydrate signature to grassland conversion in a ley-arable cropping system

Rumpel, Cornélia; Chabbi, Abad

doi:10.1007/s10705-009-9333-0

Cited by 12 publications

(6 citation statements)

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“…Because the grasses are harvested, the addition of leaf litter to soil is limited to around 20% (Sanaullah et al , ). At the same experimental site, Rumpel et al () and Rumpel & Chabbi () found a rapid decrease in SOM and a change in its composition 3 months after conversion from grassland to cropland. However, this disturbance of SOM composition was transitory and 1 year after conversion the chemical characteristics of SOM returned to their initial status.…”

Section: Resultsmentioning

confidence: 81%

Management effects on composition and dynamics of cutin and suberin in topsoil under agricultural use

Armas-Herrera

Dignac

Rumpel

et al. 2016

European J Soil Science

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Summary We identified and quantified specific biomarkers of shoots and roots (cutin and suberin‐derived compounds, respectively) of three grassland species (Dactylis glomerata L., Festuca arundinacea Schreb. and Lolium perenne L.) in soil under different land use (grass, crop and bare soil) of the SOERE‐ACBB experimental site in Lusignan (France). We also investigated the fate of these markers in soil after conversion from grassland (C3 plants) to Zea mays L. (maize) (C4 plant) with natural 13C isotope abundances. Our results indicated that 9‐hydroxy hexadecanedioic acid and 8(9)(10),16‐dihydroxy hexadecanoic acid may be used as biomarkers for above‐ground biomass, whereas 1,22‐docosandioic acid, 22‐hydroxy docosanoic acid and 24‐hydroxy tetracosanoic acid might be the best below‐ground biomarkers for the plants investigated under the experimental conditions studied. The presence, concentration and shoot–root allocation pattern of these markers were different from those described for other species, which demonstrates the importance of verifying biomarker specificity for each species. Concentrations of cutin and suberin were largest in soil under maize and smallest under bare soil; this corresponded to the biomass added to the two soils. Suberin decreased by 40–64% and cutin by 24–40% during a 6‐year bare fallow, which indicates that root markers were more sensitive than shoot markers to degradation. Changes in 13C isotopic signatures of specific biomarkers after 6 years of maize showed a faster turnover of root than shoot biomarkers, in spite of the much smaller root inputs from maize than from grasses. The sequestration of suberin in soil was more rapid but less durable than that of cutin.

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Section: Resultsmentioning

confidence: 81%

Management effects on composition and dynamics of cutin and suberin in topsoil under agricultural use

Armas-Herrera

Dignac

Rumpel

et al. 2016

European J Soil Science

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“…The source of the majority of low molecular weight compounds found in soils is likely to be bacteria that are also associated with mineral surfaces (Hopkins et al, 1992a,b). Correlations have been found between mineral-bound microbial-derived sugars such as galactose and mannose with iron and aluminium oxide content in subsoil fractions, and that such C was highly stable and old (Spielvogel et al, 2008;Rumpel et al, 2010). Studies using 14 C-labelled glucose suggest that in situ microbial growth associated with clay particles is likely to be responsible for the persistent sugars, peptides and amino acids in mineral soils (Saggar et al, 1999).…”

Section: Physical Protectionaggregates and Organomineral Complexesmentioning

confidence: 99%

Soil organic matter turnover is governed by accessibility not recalcitrance

Dungait

Hopkins

Gregory

et al. 2012

Global Change Biology

1,329

719

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Mechanisms to mitigate global climate change by sequestering carbon (C) in different 'sinks' have been proposed as at least temporary measures. Of the major global C pools, terrestrial ecosystems hold the potential to capture and store substantially increased volumes of C in soil organic matter (SOM) through changes in management that are also of benefit to the multitude of ecosystem services that soils provide. This potential can only be realized by determining the amount of SOM stored in soils now, with subsequent quantification of how this is affected by management strategies intended to increase SOM concentrations, and used in soil C models for the prediction of the roles of soils in future climate change. An apparently obvious method to increase C stocks in soils is to augment the soil C pools with the longest mean residence times (MRT). Computer simulation models of soil C dynamics, e.g. RothC and Century, partition these refractory constituents into slow and passive pools with MRTs of centuries to millennia. This partitioning is assumed to reflect: (i) the average biomolecular properties of SOM in the pools with reference to their source in plant litter, (ii) the accessibility of the SOM to decomposer organisms or catalytic enzymes, or (iii) constraints imposed on decomposition by environmental conditions, including soil moisture and temperature. However, contemporary analytical approaches suggest that the chemical composition of these pools is not necessarily predictable because, despite considerable progress with understanding decomposition processes and the role of decomposer organisms, along with refinements in simulation models, little progress has been made in reconciling biochemical properties with the kinetically defined pools. In this review, we will explore how advances in quantitative analytical techniques have redefined the new understanding of SOM dynamics and how this is affecting the development and application of new modelling approaches to soil C.

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“…The mean annual temperature and precipitation for the period 2006-2010 was 11.2°C and 773 mm, respectively. Details of the experimental site can be found elsewhere [23][24][25][26][27][28][29].…”

Section: Experimental Sitementioning

confidence: 99%

Net carbon storage measured in a mowed and grazed temperate sown grassland shows potential for carbon sequestration under grazed system

et al. 2014

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Response of bulk chemical composition, lignin and carbohydrate signature to grassland conversion in a ley-arable cropping system

Abstract: Grassland conversion is a common practice in ley-arable cropping systems.

Cited by 12 publications

References 50 publications

Management effects on composition and dynamics of cutin and suberin in topsoil under agricultural use

Management effects on composition and dynamics of cutin and suberin in topsoil under agricultural use

Soil organic matter turnover is governed by accessibility not recalcitrance

Net carbon storage measured in a mowed and grazed temperate sown grassland shows potential for carbon sequestration under grazed system

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