Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/12126 |
Resumo: | Molecular assessment of the origin and transformation processes of soil organic matter (SOM) was carried out based on information obtained from 13C NMR and analytical pyrolysis of humic acids (HAs) in soils from wine-growing regions in Tenerife (Canary Islands, Spain). Principal component analysis, using as variables pyrolysis products, shows different soil groups defined by the molecular assemblages released from the corresponding HAs, characterized by the predominance of: i) plant biomacromolecules (lignin) in soils on pumice substrate, ii) heterocyclic N-compounds and methoxyl-lacking aromatic structures, iii) a substantial domain of alkyl compounds in cultivated soils with active C turnover and finally, iv) polysaccharide and protein-derived compounds in soils developed on amorphous gels. The proportions of the pyrolytic compounds from soil HAs were represented by an upgraded graphical-statistical method (3D Van Krevelen plot) that was used to compare the major SOM structural domains in the different soils. The above results coincide with those suggested by the 13C NMR analysis, and were associated to two groups of local land management practices, in terms of their intensity respectively favoring either the transformation of plant-inherited macromolecular precursors from vascular plants, or the humification of aliphatic precursors in the presence of specific mineralogical substrates controlling microbial degradation and humification processes. |
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Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils13 C NMRAllophaneGC/MSMethoxyphenolSoil organic matterVan Krevelen diagramMolecular assessment of the origin and transformation processes of soil organic matter (SOM) was carried out based on information obtained from 13C NMR and analytical pyrolysis of humic acids (HAs) in soils from wine-growing regions in Tenerife (Canary Islands, Spain). Principal component analysis, using as variables pyrolysis products, shows different soil groups defined by the molecular assemblages released from the corresponding HAs, characterized by the predominance of: i) plant biomacromolecules (lignin) in soils on pumice substrate, ii) heterocyclic N-compounds and methoxyl-lacking aromatic structures, iii) a substantial domain of alkyl compounds in cultivated soils with active C turnover and finally, iv) polysaccharide and protein-derived compounds in soils developed on amorphous gels. The proportions of the pyrolytic compounds from soil HAs were represented by an upgraded graphical-statistical method (3D Van Krevelen plot) that was used to compare the major SOM structural domains in the different soils. The above results coincide with those suggested by the 13C NMR analysis, and were associated to two groups of local land management practices, in terms of their intensity respectively favoring either the transformation of plant-inherited macromolecular precursors from vascular plants, or the humification of aliphatic precursors in the presence of specific mineralogical substrates controlling microbial degradation and humification processes.This research has been funded by the Spanish CICyT under grant CGL2013-43845-P . The authors wish to thank to three anonymous referees by their constructive comments that contributed to improving the final version of the paper.Biblioteca Digital do IPBHernández, ZulimarAlmendros, GonzaloÁlvarez, Ana María TitoFigueiredo, Tomás deCarral, Pilar2018-01-19T10:00:00Z20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/12126engHernández, Z.; Almendros, G.; Álvarez, A.; Figueiredo, Tomás de; Carral, P. (2019). Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils. Journal of Analytical and Applied Pyrolysis. ISSN 0165-2370. 137, p. 14-280165-237010.1016/j.jaap.2018.10.015info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:42:46Zoai:bibliotecadigital.ipb.pt:10198/12126Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:09:00.788386Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
title |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
spellingShingle |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils Hernández, Zulimar 13 C NMR Allophane GC/MS Methoxyphenol Soil organic matter Van Krevelen diagram |
title_short |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
title_full |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
title_fullStr |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
title_full_unstemmed |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
title_sort |
Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils |
author |
Hernández, Zulimar |
author_facet |
Hernández, Zulimar Almendros, Gonzalo Álvarez, Ana María Tito Figueiredo, Tomás de Carral, Pilar |
author_role |
author |
author2 |
Almendros, Gonzalo Álvarez, Ana María Tito Figueiredo, Tomás de Carral, Pilar |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Hernández, Zulimar Almendros, Gonzalo Álvarez, Ana María Tito Figueiredo, Tomás de Carral, Pilar |
dc.subject.por.fl_str_mv |
13 C NMR Allophane GC/MS Methoxyphenol Soil organic matter Van Krevelen diagram |
topic |
13 C NMR Allophane GC/MS Methoxyphenol Soil organic matter Van Krevelen diagram |
description |
Molecular assessment of the origin and transformation processes of soil organic matter (SOM) was carried out based on information obtained from 13C NMR and analytical pyrolysis of humic acids (HAs) in soils from wine-growing regions in Tenerife (Canary Islands, Spain). Principal component analysis, using as variables pyrolysis products, shows different soil groups defined by the molecular assemblages released from the corresponding HAs, characterized by the predominance of: i) plant biomacromolecules (lignin) in soils on pumice substrate, ii) heterocyclic N-compounds and methoxyl-lacking aromatic structures, iii) a substantial domain of alkyl compounds in cultivated soils with active C turnover and finally, iv) polysaccharide and protein-derived compounds in soils developed on amorphous gels. The proportions of the pyrolytic compounds from soil HAs were represented by an upgraded graphical-statistical method (3D Van Krevelen plot) that was used to compare the major SOM structural domains in the different soils. The above results coincide with those suggested by the 13C NMR analysis, and were associated to two groups of local land management practices, in terms of their intensity respectively favoring either the transformation of plant-inherited macromolecular precursors from vascular plants, or the humification of aliphatic precursors in the presence of specific mineralogical substrates controlling microbial degradation and humification processes. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-19T10:00:00Z 2019 2019-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/12126 |
url |
http://hdl.handle.net/10198/12126 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Hernández, Z.; Almendros, G.; Álvarez, A.; Figueiredo, Tomás de; Carral, P. (2019). Soil carbon stabilization pathways as reflected by the pyrolytic signature of humic acid in agricultural volcanic soils. Journal of Analytical and Applied Pyrolysis. ISSN 0165-2370. 137, p. 14-28 0165-2370 10.1016/j.jaap.2018.10.015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799135349966897152 |