Tracing the source and fate of dissolved organic matter in soil after incorporation of a 13C labelled residue: A batch incubation study

Troyer, Inne De; Amery, Fien; Moorleghem, Christoff Van; Smolders, Erik; Merckx, Roel

doi:10.1016/j.soilbio.2010.11.016

Cited by 125 publications

(80 citation statements)

References 35 publications

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“…The WEOM samples from PP and BP2, DS1, and DS2 with SUVA 254 were approximately 2.0 mg -1 of C m -1 L and could be attributed to the dominance of non-humic matter. Other rotation samples with higher SUVA 254 could be a result of the inherent low aromaticity of indigenous plant-derived structures and of their rapid elimination (De Troyer et al, 2011;Hassouna et al, 2012).…”

Section: Table 1 Potato Crop Rotation Managements Concentrations Ofmentioning

confidence: 99%

Quantity and Nature of Water‐Extractable Organic Matter from Sandy Loam Soils with Potato Cropping Management

Zhang

Zhao

et al. 2016

Agricultural & Env Letters

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Section: Table 1 Potato Crop Rotation Managements Concentrations Ofmentioning

confidence: 99%

Quantity and Nature of Water‐Extractable Organic Matter from Sandy Loam Soils with Potato Cropping Management

Zhang

Zhao

et al. 2016

Agricultural & Env Letters

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“…However, there is an alternative possibility. Labile carbon addition (such as straw or cellulose) could stimulate decomposition of more recalcitrant SOM (De Troyer et al, 2011;Guenet et al, 2012) eventually resulting in stimulated CH 4 production. Such stimulation of SOM decomposition is called a priming effect.…”

Section: Introductionmentioning

confidence: 99%

Straw application in paddy soil enhances methane production also from other carbon sources

2014

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Abstract. Flooded rice fields are an important source of the greenhouse gas methane. Methane is produced from rice straw (RS), soil organic matter (SOM), and rice root organic carbon (ROC). Addition of RS is widely used for ameliorating soil fertility. However, this practice provides additional substrate for CH 4 production and results in increased CH 4 emission. Here, we found that decomposing RS is not only a substrate of CH 4 production, but in addition stimulates CH 4 production from SOM and ROC. Apart from accelerating the creation of reduced conditions in the soil environment, RS decomposition resulted in enhancement of SOM-derived CH 4 production. In particular, hydrogenotrophic methanogenesis from SOM-derived CO 2 was stimulated, presumably by H 2 released from RS decomposition. On the other hand, the enhancement of ROC-derived CH 4 production after RS application was probably caused by the significant increase of the abundance of methanogenic Archaea in the RS treatment compared with the untreated control. Our results show that traditional management of rice residues exerts a positive feedback on CH 4 production from rice fields, thus exacerbating its effect on the global CH 4 budget.

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“…Besides the substrate type/amount, microbial activity, and community composition, abiotic factors such as hydrologic variability and temperature also influence DOM production and flux (McDowell, 2003). Other studies demonstrate that plant residues or residues of microbial biomass feeding on the former are short-lived, and beyond this pulse, most of the DOM is derived from SOM (Gregorich et al, 2000;De Troyer et al, 2011). Other studies demonstrate that plant residues or residues of microbial biomass feeding on the former are short-lived, and beyond this pulse, most of the DOM is derived from SOM (Gregorich et al, 2000;De Troyer et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Importance of microbial soil organic matter processing in dissolved organic carbon production

Malik

Gleixner

2013

FEMS Microbiol Ecol

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Soil dissolved organic carbon (DOC) sources and its seasonal dynamics are poorly known. We aimed to determine the contribution of plant and soil organic matter (SOM) to size classes of DOC in a field experiment with C3 to C4 vegetation change on two soil types through different seasons. Stable isotope ratios of DOC size classes were measured using size exclusion chromatography (SEC) coupled online to liquid chromatography-isotope ratio mass spectrometry (LC-IRMS). SEC resolved DOC into three size classes: very high molecular weight/vHMW (> 10 kDa), high molecular weight/HMW (0.4-10 kDa), and low molecular weight/LMW (< 0.4 kDa). HMW DOC was most abundant in all seasons, soil types, and depths. In contrast, vHMW DOC was only seen postsnowmelt in upper 20 cm and was mainly (87 ± 9%) plant-derived. Through all seasons, HMW and LMW DOC had less than 30% recent plant contribution. Similar size range and source of DOC size classes and soil chloroform fumigation extracts suggest microbial origin of DOC. Thus, microbial SOM recycling is an important process in DOC production. We suggest that DOC molecules get partitioned manifold between soil solution and the mineral matrix (chromatography), thereby getting constantly decomposed, altered, or produced anew by soil microorganisms (reactive transport).

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Tracing the source and fate of dissolved organic matter in soil after incorporation of a 13C labelled residue: A batch incubation study

Cited by 125 publications

References 35 publications

Quantity and Nature of Water‐Extractable Organic Matter from Sandy Loam Soils with Potato Cropping Management

Quantity and Nature of Water‐Extractable Organic Matter from Sandy Loam Soils with Potato Cropping Management

Straw application in paddy soil enhances methane production also from other carbon sources

Importance of microbial soil organic matter processing in dissolved organic carbon production

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