Linking soil organic matter thermal stability with contents of clay, bound water, organic carbon and nitrogen

Kučerík, Jiří; Tokarski, David; Demyan, Michael Scott; Merbach, Ines; Siewert, Christian

doi:10.1016/j.geoderma.2017.12.001

Cited by 68 publications

(45 citation statements)

References 56 publications

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“…However, overlapping TML's caused by organic amendments ( e.g ., fresh residues or fertilizers) and SOM (clay‐dependent accumulated carbon) requires adopted evaluation approaches. A possible approach could be the use of thermal mass losses in larger predefined temperature ranges ( Kučerík et al., ) which can combine traditional fractionation of SOM with modern approaches such as density fractionation and mass spectroscopy for SOM quality determination ( Wiesmeier et al., ; Schiedung et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…Another frequently used fertilizer is charcoal, which is characterized by its superior stability in soils compared to other organic amendments (Glaser et al, 2002;Kuzyakov et al, 2009;Li et al, 2018b). The assessment of such organic amendments in SOM found increasing attention in the last years, because of their influence on soil organic carbon (SOC) stability and biological transformation processes in soil environments (Mohanty et al, 2011;Plante et al, 2011;Kuč erík et al, 2018). The complexity of SOM which results from different sources (Ferreras et al, 2006;Kä tterer et al, 2014), different transformation mechanisms and environmental controls of SOM stabilization (Franko and Merbach, 2017) makes the development of methods for assessing biological degradability a challenging task.…”

Section: Introductionmentioning

confidence: 99%

“…Two simple analytical approaches and their interrelationship have been thoroughly discussed in the past: (1) soil respiration as an indicator of microbial stability (Plante et al, 2011;Siewert et al, 2012;Peltre et al, 2013;Pronk et al, 2013) and (2) thermal analysis techniques (e.g., thermogravimetry, differential thermal analysis and differential scanning calorim-etry) for rapid determination of soil properties and SOM stability (Siewert, 2004;Lopez-Capel et al, 2005;Plante et al, 2009;Gregorich et al, 2015;Siewert and Kuč erík, 2015;Kuč erík et al, 2016;Kristl et al, 2016;Tokarski et al, 2018;Kuč erík et al, 2018;Soucé marianadin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Detectability of degradable organic matter in agricultural soils by thermogravimetry

Tokarski

Šimečková

Kučerík

et al. 2019

J. Plant Nutr. Soil Sci.

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Sustainable agricultural land use requires an assessment of degradable soil organic matter (SOM) because of its key function for soil fertility and plant nutrition. Such an assessment for practical land use should consider transformation processes of SOM and its sources of different origin. In this study, we combined a 120‐day incubation experiment with thermal decay dynamics of agricultural soils altered by added organic amendments. The aim was to determine the abilities and limits of thermal analysis as a rapid approach revealing differences in the degradability of SOM. The carried out experiments based on two independent sampling sets. The first sample set consisted of soil samples taken from non‐fertilized plots of three German long‐term agricultural field experiments (LTAEs), then artificially mixed with straw, farmyard manure, sheep faeces, and charcoal equal to 60 Mg ha−1 under laboratory conditions. The second sample set based on soil samples of different treatments (e.g., crop type, fertilization, cultivation) in LTAEs at Bad Lauchstädt and Müncheberg, Germany. Before and after the incubation experiment, thermal mass losses (TML) at selected temperatures were determined by thermogravimetry indicating the degradability of organic amendments mixed in soils. The results confirmed different microbial degradability of organic amendments and SOM under laboratory conditions. Thermal decay dynamics revealed incubation‐induced changes in the artificial soil mixtures primarily at TML around 300°C in the case of applied straw and sheep faeces, whereas farmyard manure showed mainly changes in TML around 450°C. Charcoal did not show significant degradation during incubation, which was confirmed by TML. Detailed analyses of the artificial soil mixtures revealed close correlations between CO2‐C evolution during incubation and changes in TML at 300°C with R2 > 0.96. Results of the soils from LTAEs showed similar incubation‐induced changes in thermal decay dynamics for fresh plant residues and farmyard manure. We conclude that the practical assessment of SOM could be facilitated by thermal decay dynamics if modified sample preparation and evaluation algorithms are used beyond traditional peak analysis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Tokarski

Šimečková

Kučerík

et al. 2019

J. Plant Nutr. Soil Sci.

Self Cite

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“…This concept is based on the idea that bound and mobile soil water are ecohydrologically separated within watersheds with important consequences for how we interpret water isotopes in these systems. The same concept might be applicable on a much smaller scale, in which bound water is described as hydration spheres associated with clay minerals and other particle surfaces, and mobile water is the “free water” in soil pores (Araguás‐Araguás et al, ; Kučerík, Tokarski, Demyan, Merbach, & Siewert, ; O'Neil & Truesdell, ; Savin & Hsieh, ). Some studies also include structurally bound water within clay minerals as a distinct bound pool, separate from water adsorbed on clay and organic matter surfaces (Savin & Hsieh, ).…”

Section: Introductionmentioning

confidence: 99%

Bound and mobile soil water isotope ratios are affected by soil texture and mineralogy, whereas extraction method influences their measurement

Adams

Hyodo

SantaMaria

et al. 2020

Hydrological Processes

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Questions persist about interpreting isotope ratios of bound and mobile soil water pools, particularly relative to clay content and extraction conditions. Interactions between pools and resulting extracted water isotope composition are presumably related to soil texture, yet few studies have manipulated the bound pool to understand its influence on soil water processes. Using a series of drying and spiking experiments, we effectively labelled bound and mobile water pools in soils with varying clay content. Soils were first vacuum dried to remove residual water, which was then replaced with heavy isotope-enriched water prior to oven drying and spiking with heavy isotope-depleted water. Water was extracted via centrifugation or cryogenic vacuum distillation (at four temperatures) and analysed for oxygen and hydrogen isotope ratios via isotope ratio mass spectrometry. Water from centrifuged samples fell along a mixing line between the two added waters but was more enriched in heavy isotopes than the depleted label, demonstrating that despite oven drying, a residual pool remains and mixes with the mobile water. Soils with higher clay + silt content appeared to have a larger bound pool. Water from vacuum distillation samples have a significant temperature effect, with high temperature extractions yielding progressively more heavy isotope-enriched values, suggesting that Rayleigh fractionation occurred at low temperatures in the vacuum line. By distinctly labelling bound and mobile soil water pools, we detected interactions between the two that were dependent on soil texture. Although neither extraction method appeared to completely extract the combined bound and mobile (total water) pool, centrifugation and high temperature cryogenic vacuum distillations were comparable for both δ 2 H and δ 18 O of soil water isotope ratios. K E Y W O R D Sclay mineralogy, extraction, methods, soil texture, soil water, stable isotopes, two water world hypothesis

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“…Soil organic matter (SOM) plays a key role in determining the quality, productivity, and ecological functioning of soils [1] affecting, directly or indirectly, chemical, biological, and physical properties of belowground components [2]. More specifically, SOM contributes to the nutrient accumulation and supply capacity of soils, to pH buffering capacity, and retention of pollutants or toxic elements [3].…”

Section: Introductionmentioning

confidence: 99%

Reuse of Animal Manure: A Case Study on Stakeholders’ Perceptions about Pelletized Compost in Northwestern Italy

2018

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Abstract:The present study aimed at investigating perceptions and preferences about the use and the chemical characteristics of pellets made from composted animal manure in a sample of Italian farmers and agricultural advisors (Piedmont region, Northwestern Italy). The study encompassed two different steps: At first, the participants were administered a questionnaire about their actual use of pellets and preferences about their chemical characteristics. Then, a subgroup participated into a hands-on experience with different pelletized animal manures and some final questions. Concerning the use of pellets made from composted animal manure, even if the participants affirmed to be interested in using organic pellets and declared to own the appropriate equipment needed for their application, the results indicated that pelletized compost utilization had not yet become a common practice for agricultural crops. The obtained results highlighted a lack of knowledge, especially among farmers, about the importance of some chemical properties of this pelletized organic material. The participants, both farmers and advisors, were particularly attracted by the total nitrogen content of organic pelletized fertilizers, probably because the supplying of nutrients, nitrogen particularly, is the function of fertilizers they were interested in the most due to its direct connection with crop production. The hands-on session allowed the participants to better understand the benefits of the principal chemical properties-organic matter and carbon to nitrogen ratio-of pelletized animal manure compost. On the other hand, organic matter content and carbon to nitrogen ratio, more related with biological fertility and biodiversity of soils, are immediately less interesting and, as the hands-on experience pointed out, require more effort to be appreciated by agricultural operators. Targeted information campaigns and training activities may be developed among the agricultural community to make them aware of the importance of increasing soil organic matter content, and the possible use of pelletized composted animal manure. Further studies should be addressed toward gaining more insights into the beneficial effects of the information and training activities for pelletized compost adoption.

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Linking soil organic matter thermal stability with contents of clay, bound water, organic carbon and nitrogen

Cited by 68 publications

References 56 publications

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Bound and mobile soil water isotope ratios are affected by soil texture and mineralogy, whereas extraction method influences their measurement

Reuse of Animal Manure: A Case Study on Stakeholders’ Perceptions about Pelletized Compost in Northwestern Italy

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