Investigation of the effect of soil mineral composition on soil organic matter stability
The soil organic matter (SOM) pools with different stability play different roles in the agricultural and environmental processes, e.g. in the global carbon cycle. In this work Rock-Eval (RE) pyrolysis measurements and mathematical deconvolution of RE pyrograms were used for determining the abundanc...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2016-09-01
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| Series: | Soil and Water Research |
| Subjects: | |
| Online Access: | https://swr.agriculturejournals.cz/artkey/swr-201603-0001_investigation-of-the-effect-of-soil-mineral-composition-on-soil-organic-matter-stability.php |
| _version_ | 1797897874987548672 |
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| author | Nóra CZIRBUS Tünde NYILAS Béla RAUCSIK Magdolna HETÉNYI |
| author_facet | Nóra CZIRBUS Tünde NYILAS Béla RAUCSIK Magdolna HETÉNYI |
| author_sort | Nóra CZIRBUS |
| collection | DOAJ |
| description | The soil organic matter (SOM) pools with different stability play different roles in the agricultural and environmental processes, e.g. in the global carbon cycle. In this work Rock-Eval (RE) pyrolysis measurements and mathematical deconvolution of RE pyrograms were used for determining the abundance, quality, and main biological sources of SOM, as well as for evaluating the relative proportion of the labile (fresh plant and litter) and resistant (lignin and cellulose) bio-macromolecules, immature (humic substances) and mature refractory (naturally stable biological compounds, organic matter stabilized by physico-chemical processes and black carbon) geo-macromolecules. The samples were taken from the A-horizons of Leptosol, Luvisol, and Acrisol formed under different soil conditions (mineral composition, pH, and leaching). In agreement with the present vegetation, bulk RE data together with the results from the mathematical deconvolution of pyrograms display terrigeneous plant remnants as precursors of SOM for all the three samples. The presence of the more stable components, indicated by our results in the A-horizon only of Luvisol and Acrisol, could be a consequence of the intense leaching. In contrast, due to the limited leaching, the soluble components also remained in the A-horizon of Leptosol, for this reason SOM seems to be relatively well preserved. The comparison of the results measured and calculated on whole soil samples and their mineral-free hydrolysis-resistant macromolecular fractions (ROM) reveals that the stabilization of SOM is mainly controlled by organo-mineral association in Leptosol and Luvisol. These results suggest the importance of iron-oxides and -hydroxides and clay minerals in the stabilization of SOM for Leptosol and Luvisol, respectively, whereas in Acrisol the stability of SOM is due to the high relative contribution of naturally stable organic compounds. |
| first_indexed | 2024-04-10T08:04:10Z |
| format | Article |
| id | doaj.art-7da943cc2f734897937543d1e6fb92ed |
| institution | Directory Open Access Journal |
| issn | 1801-5395 1805-9384 |
| language | English |
| last_indexed | 2024-04-10T08:04:10Z |
| publishDate | 2016-09-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Soil and Water Research |
| spelling | doaj.art-7da943cc2f734897937543d1e6fb92ed2023-02-23T03:48:32ZengCzech Academy of Agricultural SciencesSoil and Water Research1801-53951805-93842016-09-0111314715410.17221/47/2015-SWRswr-201603-0001Investigation of the effect of soil mineral composition on soil organic matter stabilityNóra CZIRBUS0Tünde NYILAS1Béla RAUCSIK2Magdolna HETÉNYI3Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, HungaryDepartment of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, HungaryDepartment of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, HungaryDepartment of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, HungaryThe soil organic matter (SOM) pools with different stability play different roles in the agricultural and environmental processes, e.g. in the global carbon cycle. In this work Rock-Eval (RE) pyrolysis measurements and mathematical deconvolution of RE pyrograms were used for determining the abundance, quality, and main biological sources of SOM, as well as for evaluating the relative proportion of the labile (fresh plant and litter) and resistant (lignin and cellulose) bio-macromolecules, immature (humic substances) and mature refractory (naturally stable biological compounds, organic matter stabilized by physico-chemical processes and black carbon) geo-macromolecules. The samples were taken from the A-horizons of Leptosol, Luvisol, and Acrisol formed under different soil conditions (mineral composition, pH, and leaching). In agreement with the present vegetation, bulk RE data together with the results from the mathematical deconvolution of pyrograms display terrigeneous plant remnants as precursors of SOM for all the three samples. The presence of the more stable components, indicated by our results in the A-horizon only of Luvisol and Acrisol, could be a consequence of the intense leaching. In contrast, due to the limited leaching, the soluble components also remained in the A-horizon of Leptosol, for this reason SOM seems to be relatively well preserved. The comparison of the results measured and calculated on whole soil samples and their mineral-free hydrolysis-resistant macromolecular fractions (ROM) reveals that the stabilization of SOM is mainly controlled by organo-mineral association in Leptosol and Luvisol. These results suggest the importance of iron-oxides and -hydroxides and clay minerals in the stabilization of SOM for Leptosol and Luvisol, respectively, whereas in Acrisol the stability of SOM is due to the high relative contribution of naturally stable organic compounds.https://swr.agriculturejournals.cz/artkey/swr-201603-0001_investigation-of-the-effect-of-soil-mineral-composition-on-soil-organic-matter-stability.phporgano-mineral associationrock-eval pyrolysisthermal stability |
| spellingShingle | Nóra CZIRBUS Tünde NYILAS Béla RAUCSIK Magdolna HETÉNYI Investigation of the effect of soil mineral composition on soil organic matter stability Soil and Water Research organo-mineral association rock-eval pyrolysis thermal stability |
| title | Investigation of the effect of soil mineral composition on soil organic matter stability |
| title_full | Investigation of the effect of soil mineral composition on soil organic matter stability |
| title_fullStr | Investigation of the effect of soil mineral composition on soil organic matter stability |
| title_full_unstemmed | Investigation of the effect of soil mineral composition on soil organic matter stability |
| title_short | Investigation of the effect of soil mineral composition on soil organic matter stability |
| title_sort | investigation of the effect of soil mineral composition on soil organic matter stability |
| topic | organo-mineral association rock-eval pyrolysis thermal stability |
| url | https://swr.agriculturejournals.cz/artkey/swr-201603-0001_investigation-of-the-effect-of-soil-mineral-composition-on-soil-organic-matter-stability.php |
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