Mechanisms controlling soil organic carbon composition pertaining to microbial decomposition of biochemically contrasting organic residues: Evidence from midDRIFTS peak area analysis

Kunlanit, Benjapon; Vityakon, Patma; Puttaso, Aunnop; Cadisch, Georg; Rasche, Frank

doi:10.1016/j.soilbio.2014.05.006

Cited by 43 publications

(33 citation statements)

References 35 publications

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“…These low MW humic acids are easily leached from topsoils to subsoils during rainy seasons. It was found that, upon decomposition, rice straw produced a large amount of aliphatic C functional group constituents of labile C compounds [66]. These C compounds are soluble and less adsorbed to soil colloidal surfaces than the aromatic C compounds.…”

Section: Chemical Composition Of Carbon In Topsoils and Subsoilsmentioning

confidence: 99%

“…Rice straw and stubble remaining in the fields after the rice harvest have high cellulose contents that, upon decomposition, released a large amount of low MW DOC, leading to a buildup of new labile SOC with a smaller degree of aromaticity. Kunlanit et al [66] reported that decomposition of rice straw was rapid and produced high amounts of aliphatic C constituents. The cassava soil in this study had SOM, which had a higher degree of polymerization, as indicated by lower values of the E4:E6 ratio of humic acids than in the paddy soil.…”

Section: Chemical Composition Of Carbon In Topsoils and Subsoilsmentioning

confidence: 99%

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Land–Use Changes Influencing C Sequestration and Quality in Topsoil and Subsoil

2019

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Soil capacity as a major carbon (C) sink is influenced by land use. Estimates of soil organic carbon (SOC) sequestration have mostly focused on topsoils [0–30 cm official Intergovernmental Panel on Climate Change (IPCC) soil depth]. We investigated SOC stocks and their quality as influenced by land-use changes. Soil samples were collected from five soil depths down to 100 cm of three adjacent fields each representing a different land use—forest, cassava, and rice paddy—in Northeast Thailand. Sequestration of SOC in topsoils under all land uses was higher, as indicated by SOC stocks (59.0–82.0 Mg ha−1) than subsoils (30–100 cm) (27.0–33.0 Mg ha−1). The soil profile (0–100 cm) of the forest had higher stocks of SOC and humic acid (115.0 and 6.8 Mg ha−1, respectively) than those of cultivated land uses [paddy (100.0 and 4.8 Mg ha−1, respectively) and cassava (87.0 and 2.3 Mg ha−1, respectively)], which accounted for an average 30% increase in SOC sequestration over those with only topsoil. Topsoils of the forest had higher humic acid content but narrower E4:E6 ratio [the ratio of absorbances at 465 nm (E4) and at 665 nm (E6)] of humic acids (2.8), indicating a higher degree of humification and stabilization than the cultivated soils (3.2–3.6). Subsoil C was higher quality, as indicated by the lower E4:E6 ratio of humic acids than topsoils in all land uses.

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Section: Chemical Composition Of Carbon In Topsoils and Subsoilsmentioning

confidence: 99%

Section: Chemical Composition Of Carbon In Topsoils and Subsoilsmentioning

confidence: 99%

Land–Use Changes Influencing C Sequestration and Quality in Topsoil and Subsoil

2019

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“…However, this speculative assumption clearly raises the need for prospective research if distinct soil types with their individual soil textures and aggregation processes and hence SOC stabilization are more responsible for the determination of the composition of microbial communities including ammonia-oxidizers over other factors such as the use of contrasting organic soil amendments . Additionally, it will be necessary to enhance the currently limited understanding on the potential of biochemically contrasting organic inputs and accompanied microbial decomposition processes to shape the physical properties (e.g., aggregation) of soils (Kunlanit et al, 2014;Puttaso et al, 2013).…”

Section: Tablementioning

confidence: 99%

“…We recommend prospective research with repeated measurements during critical growth stages of the test crop (Hai et al, 2009) to consider seasonal dynamics of microbial decomposer communities to separate temporal responses to freshly applied organic inputs (direct effects) versus those to altered soil organic matter quality induced by different organic and inorganic inputs in the long-term (secondary effects) (Kunlanit et al, 2014). This will provide the required baseline to better understand the presumed, but not detected interacting effects of organic and inorganic inputs on soil decomposer microbial communities.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Response of ammonia-oxidizing bacteria and archaea to biochemical quality of organic inputs combined with mineral nitrogen fertilizer in an arable soil

Muema

Cadisch

Röhl

et al. 2015

Applied Soil Ecology

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“…Litter residue analysis of contrasting functional organic compounds, selected as midDRIFTS peak measurements modified afterKunlanit et al (2014).…”

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Litter decomposition driven by soil fauna, plant diversity and soil management in urban gardens

Tresch

Frey

Bayon

et al. 2019

Science of The Total Environment

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which should be cited to refer to this work. richness decreased, with the exception of gastropods, and soil fauna abundance increased with urban warming. Our data also show that plant species richness positively affected litter decomposition by increasing soil fauna species richness and microbial activity. A multivariate analysis of organic compounds in litter residues confirmed the importance of soil fauna species richness and garden management on litter decomposition processes. Overall, we showed, that also in intensively managed urban green spaces, such as gardens, biodiversity of plants and soil fauna drives key ecosystem processes. Urban planning strategies that integrate soil protecting management practices may help to maintain important ecosystem services in this heavily used urban environment.

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Mechanisms controlling soil organic carbon composition pertaining to microbial decomposition of biochemically contrasting organic residues: Evidence from midDRIFTS peak area analysis

Cited by 43 publications

References 35 publications

Land–Use Changes Influencing C Sequestration and Quality in Topsoil and Subsoil

Land–Use Changes Influencing C Sequestration and Quality in Topsoil and Subsoil

Response of ammonia-oxidizing bacteria and archaea to biochemical quality of organic inputs combined with mineral nitrogen fertilizer in an arable soil

Litter decomposition driven by soil fauna, plant diversity and soil management in urban gardens

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