Rate of soil‐aggregate formation under different organic matter amendments—a short‐term incubation experiment

Andruschkewitsch, Rouven; Geisseler, Daniel; Dultz, Stefan; Joergensen, R. G.; Ludwig, Bernard

doi:10.1002/jpln.201200628

Cited by 40 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the substantial amounts of microbial products and other organics are accumulated and serve to stabilize the macroaggregates, so increasing the MWD (Table 2). This is in accordance with the findings of several studies that addition of recently available organic materials led to higher microbial activity and more organic compounds serving as binding agents for macroaggregate formation (Le Guillou et al, 2012;Andruschkewitsch et al, 2014). It is worthy to note that large macroaggregate was the only aggregate fraction responsible for the apparent increase in total amino sugar concentrations with elevated manure applications, indicating a low efficiency of microbial C sequestration by high manuring.…”

Section: Amino Sugarssupporting

confidence: 87%

“…This indicates that amount of manure application strongly influenced SOM quality with respect to microbial residues. It was suggested that macroaggregates are the most dynamic (Six et al, 2000) and they are oversaturated with SOC with only a smaller amount of the added organic matter being stabilized for longer periods within macroaggregates in the soil (Andruschkewitsch et al, 2014). Therefore, greater proportions of amino sugars in SOC in macroaggregate fraction are important for the SOM pool's capacity to function as an active nutrient sink and source reservoir.…”

Section: Indicative Significance Of Amino Sugar Proportion In Soc Witmentioning

confidence: 99%

See 1 more Smart Citation

Higher rates of manure application lead to greater accumulation of both fungal and bacterial residues in macroaggregates of a clay soil

Ding

Liang

Zhang

et al. 2015

Soil Biology and Biochemistry

View full text Add to dashboard Cite

Section: Amino Sugarssupporting

confidence: 87%

Section: Indicative Significance Of Amino Sugar Proportion In Soc Witmentioning

confidence: 99%

Higher rates of manure application lead to greater accumulation of both fungal and bacterial residues in macroaggregates of a clay soil

Ding

Liang

Zhang

et al. 2015

Soil Biology and Biochemistry

View full text Add to dashboard Cite

“…Macro-aggregate formation is a rapid process driven by the amount of carbon input and fungal activity (De Gryze et al, 2005). Macroaggregates can develop within 7 days in a loess soil, containing many times more SOC than the parent material, but are relatively unstable so act as a carbon source for microbial decomposition (Andruschkewitsch et al, 2014). The degree of aggregation depends on the size distribution of organo-mineral associations and their chemical characteristics (Christensen, 2002).…”

Section: Aggregate Scalementioning

confidence: 99%

Soil organic carbon across scales

O’Rourke

Angers

Holden

et al. 2015

Global Change Biology

138

View full text Add to dashboard Cite

Mechanistic understanding of scale effects is important for interpreting the processes that control the global carbon cycle. Greater attention should be given to scale in soil organic carbon (SOC) science so that we can devise better policy to protect/enhance existing SOC stocks and ensure sustainable use of soils. Global issues such as climate change require consideration of SOC stock changes at the global and biosphere scale, but human interaction occurs at the landscape scale, with consequences at the pedon, aggregate and particle scales. This review evaluates our understanding of SOC across all these scales in the context of the processes involved in SOC cycling at each scale and with emphasis on stabilizing SOC. Current synergy between science and policy is explored at each scale to determine how well each is represented in the management of SOC. An outline of how SOC might be integrated into a framework of soil security is examined. We conclude that SOC processes at the biosphere to biome scales are not well understood. Instead, SOC has come to be viewed as a large-scale pool subjects to carbon flux. Better understanding exists for SOC processes operating at the scales of the pedon, aggregate and particle. At the landscape scale, the influence of large- and small-scale processes has the greatest interaction and is exposed to the greatest modification through agricultural management. Policy implemented at regional or national scale tends to focus at the landscape scale without due consideration of the larger scale factors controlling SOC or the impacts of policy for SOC at the smaller SOC scales. What is required is a framework that can be integrated across a continuum of scales to optimize SOC management.

show abstract

“…Several researchers found that the input of organic material is positively related to the formation of aggregates (Christensen, ). The aggregate disruption upon crop residue incorporation is postulated to be compensated by the fast reformation of aggregates (Andruschkewitsch et al ., ) caused by an increase in microbial activity and microbially derived binding agents (Mikha & Rice, ). However, we could not detect an increase in C mic concentration and CO 2 emission (as indicator for microbial activity) for the treatments with residue incorporation.…”

Section: Discussionmentioning

confidence: 99%

Effects of cover crop growth and decomposition on the distribution of aggregate size fractions and soil microbial carbon dynamics

Linsler

Kaiser

Andruschkewitsch

et al. 2016

Soil Use and Management

View full text Add to dashboard Cite

Although the effects of cover crops (CC) on various soil parameters have been fully investigated, less is known about the impacts at different stages in CC cultivation. The objective of this study was to quantify the influence of CC cultivation stages and residue placement on aggregates and microbial carbon (C mic ). Additionally, the influence of residue location and crop species on CO 2 emissions and leached mineralized nitrogen (N min ) during the plant degradation period was also investigated. Within an incubation experiment, four CC species were sown in soil columns, with additional columns being kept plant-free. After plant growth, the columns were frozen (as occurs in winter under field conditions) and then incubated with the plant material either incorporated or surface-applied. With CC, concentrations of large and medium macroaggregates were twice that of the fallow, confirming positive effects of root growth. Freezing led to a decrease in these aggregate size classes. In the subsequent incubation, the large macroaggregates decreased far more in the samples with CC than in the fallow, leading to similar aggregate size distributions. No difference in C mic concentration was found among the CC cultivation stages. CO 2 emissions were roughly equivalent to the carbon amounts added as plant residues. Comparison of columns with incorporated or surface-applied residues indicated no consistent pattern of aggregate distribution, CO 2 emission or C mic and N min concentrations. Our results suggest that positive effects of CC cultivation are only short term and that a large amount of organic material in the soil could have a greater influence than CC cultivation.

show abstract

Rate of soil‐aggregate formation under different organic matter amendments—a short‐term incubation experiment

Cited by 40 publications

References 36 publications

Higher rates of manure application lead to greater accumulation of both fungal and bacterial residues in macroaggregates of a clay soil

Higher rates of manure application lead to greater accumulation of both fungal and bacterial residues in macroaggregates of a clay soil

Soil organic carbon across scales

Effects of cover crop growth and decomposition on the distribution of aggregate size fractions and soil microbial carbon dynamics

Contact Info

Product

Resources

About