Organic matter input determines structure development and aggregate formation in artificial soils

Bucka, Franziska; Kölbl, Angelika; Uteau, Daniel; Peth, Stephan; Kögel‐Knabner, Ingrid

doi:10.1016/j.geoderma.2019.113881

Cited by 89 publications

(68 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Haynes and Naidu, 1998;Ruehlmann and Körschens, 2009;Jarvis et al, 2017). This is partly because the density of organic matter is less than that of soil minerals, but more importantly, it is a consequence of the aggregated soil structure induced by the microbial decomposition of fresh organic matter (Tisdall and Oades, 1982;Young and Crawford, 2004;Cosentino et al, 2006;Feeney et al, 2006;Bucka et al, 2019). Changes in the SOM content may also affect the pore size distribution, although the magnitude of these effects across different ranges of pore diameter is still a matter of some controversy (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Whereas sorption interactions with mineral surfaces are probably the dominant mechanisms protecting SOM from decomposition in coarse-textured soils, the additional physical protection afforded by microporous regions of the soil may lead to an enhanced long-term storage of SOM in structured fine-textured soils (e.g. Hassink et al, 1993;Chevallier et al, 2004;Souza et al, 2017;Dignac et al, 2017). Thus, the turnover of both particulate and soluble SOM has been shown to depend on its location in soil pore networks of different diameters and connectivity and with contrasting microbial communities (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…For example, soil tillage may promote decomposition by exposing SOM that was previously effectively protected from microbial attack within microporous regions of the soil (e.g. Balesdent et al, 2000;Chevallier et al, 2004). Physical protection of SOM is also affected by the mixing resulting from the ingestion and casting of soil by earthworms (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

et al. 2020

View full text Add to dashboard Cite

Abstract. Models of soil organic carbon (SOC) storage and turnover can be useful tools to analyse the effects of soil and crop management practices and climate change on soil organic carbon stocks. The aggregated structure of soil is known to protect SOC from decomposition and, thus, influence the potential for long-term sequestration. In turn, the turnover and storage of SOC affects soil aggregation, physical and hydraulic properties and the productive capacity of soil. These two-way interactions have not yet been explicitly considered in modelling approaches. In this study, we present and describe a new model of the dynamic feedbacks between soil organic matter (SOM) storage and soil physical properties (porosity, pore size distribution, bulk density and layer thickness). A sensitivity analysis was first performed to understand the behaviour of the model. The identifiability of model parameters was then investigated by calibrating the model against a synthetic data set. This analysis revealed that it would not be possible to unequivocally estimate all of the model parameters from the kind of data usually available in field trials. Based on this information, the model was tested against measurements of bulk density, SOC concentration and limited data on soil water retention and soil surface elevation made during 63 years in a field trial located near Uppsala (Sweden) in three treatments with different organic matter (OM) inputs (bare fallow, animal and green manure). The model was able to accurately reproduce the changes in SOC, soil bulk density and surface elevation observed in the field as well as soil water retention curves measured at the end of the experimental period in 2019 in two of the treatments. Treatment-specific variations in SOC dynamics caused by differences in OM input quality could be simulated very well by modifying the value for the OM retention coefficient ε (0.37 for animal manure and 0.14 for green manure). The model approach presented here may prove useful for management purposes, for example, in an analysis of carbon sequestration or soil degradation under land use and climate change.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Haynes and Naidu, 1998;Ruehlmann and Körschens, 2009;Jarvis et 35 al., 2017). This is partly because the density of organic matter is less than that of soil minerals, but more importantly, it is a consequence of the aggregated soil structure induced by the microbial decomposition of fresh organic matter (Tisdall and Oades, 1982;Young and Crawford, 2004;Cosentino et al, 2006;Feeney et al, 2006;Bucka et al, 2019). Changes in the SOM content may also affect the pore size distribution, although the magnitude of these effects across different ranges of pore diameter is still a matter of some controversy (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that the 205 composition of OM sources may affect the extent of soil aggregation generated by microbial activity (e.g. Bucka et al, 2019). In this respect, each of the four OM pools could have been characterized by a different aggregation factor.…”

mentioning

confidence: 99%

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

Meurer¹,

Chenu²,

Coucheney³

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. Models of soil organic carbon (SOC) storage and turnover can be useful tools to analyze the effects of soil and crop management practices and climate change on soil organic carbon stocks. The aggregated structure of soil is known to protect SOC from decomposition, and thus influence the potential for long-term sequestration. In turn, the turnover and storage of SOC affects soil aggregation, physical and hydraulic properties and the productive capacity of soil. These interactions have not yet been explicitly considered in modelling approaches. In this study, we present and describe a new model of the dynamic feedbacks between SOM storage and soil physical properties (porosity, pore size distribution, bulk density and layer thickness). A sensitivity analysis was first performed to understand the behaviour of the model. The identifiability of model parameters was then investigated by calibrating the model against a synthetic data set. This analysis revealed that it would not be possible to unequivocally estimate all of the model parameters from the kind of data usually available in field trials. Based on this information, the model was tested against measurements of bulk density and SOC concentration, as well as limited data on soil water retention and soil surface elevation, made during 63 years in a field trial located near Uppsala (Sweden) in three treatments with different OM inputs (bare fallow, animal and green manure). The model was able to accurately reproduce the changes in SOC, soil bulk density, surface elevation and soil water retention curves observed in the field. Treatment-specific variations in SOC dynamics caused by differences in OM input quality could be simulated very well by modifying the value for the OM retention coefficient ε (0.37 for animal manure and 0.14 for green manure). The model approach presented here may prove useful for management purposes, for example, in an analysis of carbon sequestration or soil degradation under land use and climate change.

show abstract

The influence of plant residues on soil aggregation and carbon content: A meta‐analysis

Husain

Dijkstra

2023

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

Background Soil aggregation and organic carbon (OC) content are important indicators of soil quality that can be improved with plant residue amendments. The extent of the effects of plant residue amendments on soil aggregation and OC content across different plant residue and soil types is not fully understood. Aim In this meta‐analysis, we evaluated the effects of plant residue amendments on soil aggregation and OC content for different plant residues (fresh, charred) and soil types varying in clay content, initial OC content, and pH. Methods Our meta‐analysis included 50 published studies (total of 299 paired observations). We estimated the response ratios of mean weight diameter (MWD) and separate aggregate size classes, total soil OC (TSC), and aggregate‐associated OC. We also considered the effect of experimental factors (study duration, residue type, residue amount, initial soil OC, clay content, and pH). Results The benefit of plant residue amendment on soil aggregation was larger in soils with initially low OC content and neutral pH. Initial soil OC content and pH were more important than soil clay content for OC storage in soil aggregates. Both fresh and charred plant residue amendments were effective in forming aggregates, whereas charred residues were more effective in increasing TSC. We found only a weak positive relationship between the response ratio of TSC and MWD indicating that other factors besides soil aggregation contributed to the increase in soil C storage. Conclusions While plant residue amendments can enhance soil aggregation and TSC, these effects are likely governed by the type of plant residue and soil properties such as the initial soil pH and OC content.

show abstract

Organic matter input determines structure development and aggregate formation in artificial soils

Cited by 89 publications

References 73 publications

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

The influence of plant residues on soil aggregation and carbon content: A meta‐analysis

Contact Info

Product

Resources

About