Storage of organic carbon in aggregate and density fractions of silty soils under different types of land use

John, B.; Yamashita, Tamon; Ludwig, Bernard; Flessa, Heiner

doi:10.1016/j.geoderma.2004.12.013

Cited by 593 publications

(410 citation statements)

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“…The maintenance of the SOM carbon concentration has been suggested to be a consequence of biomass production during plant growth (de la Rosa and Knicker 2011). Meanwhile, SAPs had the potential benefit of helping retain SOM in the soil by incorporating it into aggregates where it can be protected from decomposition (Goebel et al 2005;John et al 2005). However, increase in SOM did not improve cabbage growth in the sufficient water regime, only in the water deficit treatment.…”

Section: Effect Of Saps On Som Smbc and Smrmentioning

confidence: 99%

“…Research has shown that applications of SAPs can decrease soil water permeability and soil bulk density (Busscher et al 2009), increase water-holding capacity and the amount of soil water-stable aggregates, and assist in the protection of soil organic matter (Goebel et al 2005;John et al 2005). However, the effects of SAPs on the soil ecosystem and the soil microbial ecosystem are not well understood.…”

Section: Introductionmentioning

confidence: 99%

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Effects of super absorbent polymers on soil microbial properties and Chinese cabbage (Brassica chinensis) growth

Liu

et al. 2013

J Soils Sediments

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Section: Effect Of Saps On Som Smbc and Smrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of super absorbent polymers on soil microbial properties and Chinese cabbage (Brassica chinensis) growth

Liu

et al. 2013

J Soils Sediments

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“…Several physical procedures have been proposed to isolate physically stabilized SOM fractions with different composition and stability and to characterize and quantify mechanisms of SOM stabilization in soils. These methods include aggregate-size fractionations (e.g., Oades and Waters, 1991;Jastrow et al, 1996;Puget et al, 2000), particle-size fractionations (e.g., Tiessen et al, 1981;Christensen, 2001;Jolivet et al, 2003), density fractionations (e.g., Balesdent et al, 1998;Baisden et al, 2002;Yamashita et al, 2006), and their combinations (e.g., Cambardella and Elliott, 1993;Rodionov et al, 2000;Six et al, 2002;John et al, 2005). To account for chemical stabilization processes, different extraction procedures (Balesdent, 1996;Ludwig et al, 2003), wet oxidation (Eusterhus et al, 2005;Mikutta et al, 2005), acid hydrolyses (Paul et al, 2001;Poirier et al, 2003;Plante et al, 2006), and various combinations of these procedures (Helfrich et al, 2007) have been used, frequently on physically isolated soil fractions (cf., e.g., von Lützow et al, 2007 for a recent review).…”

Section: Introductionmentioning

confidence: 99%

Storage and stability of organic matter and fossil carbon in a Luvisol and Phaeozem with continuous maize cropping: A synthesis

Flessa

Amelung

Helfrich

et al. 2008

Z. Pflanzenernähr. Bodenk.

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Quantitative information about the amount and stability of organic carbon (OC) in different soil organic-matter (OM) fractions and in specific organic compounds and compound-classes is needed to improve our understanding of organic-matter sequestration in soils. In the present paper, we summarize and integrate results performed on two different arable soils with continuous maize cropping (a) Stagnic Luvisol with maize cropping for 24 y, b) Luvic Phaeozem with maize cropping for 39 y) to identify (1) the storage of OC in different soil organic-matter fractions, (2) the function of these fractions with respect to soil-OC stabilization, (3) the importance and partitioning of fossil-C deposits, and (4) the rates of soil-OC stabilization as assessed by compound-specific isotope analyses. The fractionation procedures included particle-size fractionation, density fractionation, aggregate fractionation, acid hydrolysis, different oxidation procedures, isolation of extractable lipids and phospholipid fatty acids, pyrolysis, and the determination of black C. Stability of OC was determined by 13 C and 14 C analyses. The main inputs of OC were plant litter (both sites) and deposition of fossil C likely from coal combustion and lignite dust (only Phaeozem). Total soil OC stocks down to a depth of 65 cm (7.83 kg m -2 in the Luvisol and 9.66 kg m -2 in the Phaeozem) consisted mainly of mineral-bound OC (87% of total SOC in the Luvisol and 69% in the Phaeozem). In the Luvisol, free light particulate OM, OM associated with sand and coarse silt, and particulate OM occluded in macro-aggregates represented SOM fractions with mean turnover times shorter than that of the bulk soil OC (54 y). Additionally, the turnover of all individual compounds or compound classes (except for black carbon) was faster than that of bulk soil OC. These OM fractions that were less stable than the bulk soil OM made up 13% to 20% of the total OC. Organic matter in fine and medium silt and clay fractions, particulate OM occluded in micro-aggregates (53-250 lm) and OM resistant to acid hydrolysis had intermediate turnover times of about 50-100 y. These fractions with intermediate turnover times contributed 70%-80% to total soil OC. Passive OM with turnover times >200 y was isolated from the mineral-bound OM by different oxidation procedures (H 2 O 2 , Na 2 S 2 O 8 ) and made up ≤10% of the total OC. The isotopic signature of PLFAs suggests an efficient recycling of OC derived from C3 substrate. In the Phaeozem, partitioning of maize-derived C exhibited a pattern similar to the Luvisol, but turnover rates of vegetation-derived soil OC were lower, probably because of the considerably smaller input of plant residues. Fossil C contributed approx. 50% to the total OC and accumulated preferentially in the particulate OM occluded in aggregates and in the fine-sand and

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“…This preferential transport results from the fact that SOC is not distributed uniformly throughout the soil, but instead consists of several fractions, characterized by different densities and particle sizes. For example, some soil organic carbon is bound to the fine mineral fraction, some is encapsulated in soil aggregates, while another SOC fraction exists as mineral-free particulate organic carbon (POC) and has a much lower density (John et al, 2005;Von Lützow et al, 2007). This differentiation is particularly relevant for the C cycle, since for example the C fraction with the highest potential mobilization and transport capacity (i.e.…”

Section: Introductionmentioning

confidence: 99%

Modelling a century of soil redistribution processes and carbon delivery from small watersheds using a multi-class sediment transport model

2017

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Abstract.Over the last few decades, soil erosion and carbon redistribution modelling has received a lot of attention due to large uncertainties and conflicting results. For a physically based representation of event dynamics, coupled soil and carbon erosion models have been developed. However, there is a lack of research utilizing models which physically represent preferential erosion and transport of different carbon fractions (i.e. mineral bound carbon, carbon encapsulated by aggregates and particulate organic carbon). Furthermore, most of the models that have a high temporal resolution are applied to relatively short time series (< 10 yr −1 ), which might not cover the episodic nature of soil erosion. We applied the event-based multi-class sediment transport (MCST) model to a 100-year time series of rainfall observation. The study area was a small agricultural catchment (3 ha) located in the Belgium loess belt about 15 km southwest of Leuven, with a rolling topography of slopes up to 14 %. Our modelling analysis indicates (i) that interrill erosion is a selective process which entrains primary particles, while (ii) rill erosion is non-selective and entrains aggregates, (iii) that particulate organic matter is predominantly encapsulated in aggregates, and (iv) that the export enrichment in carbon is highest during events dominated by interrill erosion and decreases with event size.

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Storage of organic carbon in aggregate and density fractions of silty soils under different types of land use

Cited by 593 publications

References 40 publications

Effects of super absorbent polymers on soil microbial properties and Chinese cabbage (Brassica chinensis) growth

Effects of super absorbent polymers on soil microbial properties and Chinese cabbage (Brassica chinensis) growth

Storage and stability of organic matter and fossil carbon in a Luvisol and Phaeozem with continuous maize cropping: A synthesis

Modelling a century of soil redistribution processes and carbon delivery from small watersheds using a multi-class sediment transport model

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