Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil

The aim of this study was to determine the effect of progressive pig slurry (PS) rates, applied over a 12-year period, on the molecular composition of soil organic matter in a calcareous soil. Annual organic matter rates of PS ranged from 1.0 to 4.8 Mg ha−1. Humic acids (HAs) were extracted from fie...

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Autores: Bosch Serra, Àngela D., Jiménez-de-Santiagoa, Diana E., González-Pérez, José-Antonio, Almendros, Gonzalo
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2025
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositório:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/467748
Acesso em linha:https://doi.org/10.3390/agronomy15030725
https://hdl.handle.net/10459.1/467748
Access Level:Acceso aberto
Palavra-chave:Aromatic compounds
Humic acid
Soil organic carbon
Analytical pyrolysis
Soil amendment
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spelling Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil Bosch Serra, Àngela D. Jiménez-de-Santiagoa, Diana E. González-Pérez, José-Antonio Almendros, Gonzalo Aromatic compounds Humic acid Soil organic carbon Analytical pyrolysis Soil amendment The aim of this study was to determine the effect of progressive pig slurry (PS) rates, applied over a 12-year period, on the molecular composition of soil organic matter in a calcareous soil. Annual organic matter rates of PS ranged from 1.0 to 4.8 Mg ha−1. Humic acids (HAs) were extracted from field plots treated with PS, including a control (no PS applied). These HAs were analysed using pyrolysis-gas chromatography-mass spectrometry. The proportions of the 122 major compounds released from the soil HAs indicated that PS stimulated humification processes, with the degree of enhancement depending on the application rate. The applied PS contained a high proportion of aliphatic compounds, but only steroids and triterpenes accumulated in the HA soil fraction, and this was only observed at low PS rates. These results suggest that the application of PS leads to a dose-dependent increase in alkyl compounds, mainly alkanes and olefins. Aromatic compounds also showed a dose-dependent increase, but not in terms of the demethoxylated compounds typical of mature humic substances found in the original soil. Instead, the increase in aromatics was observed in the form of methoxyphenols, suggesting a recent incorporation of lignin derivatives from crop residues into the HA. This research was funded by the Spanish Ministry of Science, Innovation and Universities and the Spanish National Institute for Agronomic Research (MICINN-INIA) through the project RTA2017-88-C3-3. MDPI https://doi.org/10.3390/agronomy15030725 https://hdl.handle.net/10459.1/467748
title Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
spellingShingle Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
Bosch Serra, Àngela D.
Aromatic compounds
Humic acid
Soil organic carbon
Analytical pyrolysis
Soil amendment
title_short Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
title_full Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
title_fullStr Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
title_full_unstemmed Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
title_sort Pig slurry fertilization changes the pyrolytic signature of humic substances in calcareous soil
author Bosch Serra, Àngela D.
author_facet Bosch Serra, Àngela D.
Jiménez-de-Santiagoa, Diana E.
González-Pérez, José-Antonio
Almendros, Gonzalo
author_role author
author2 Jiménez-de-Santiagoa, Diana E.
González-Pérez, José-Antonio
Almendros, Gonzalo
author2_role author
author
author
topic Aromatic compounds
Humic acid
Soil organic carbon
Analytical pyrolysis
Soil amendment
topic_facet Aromatic compounds
Humic acid
Soil organic carbon
Analytical pyrolysis
Soil amendment
description The aim of this study was to determine the effect of progressive pig slurry (PS) rates, applied over a 12-year period, on the molecular composition of soil organic matter in a calcareous soil. Annual organic matter rates of PS ranged from 1.0 to 4.8 Mg ha−1. Humic acids (HAs) were extracted from field plots treated with PS, including a control (no PS applied). These HAs were analysed using pyrolysis-gas chromatography-mass spectrometry. The proportions of the 122 major compounds released from the soil HAs indicated that PS stimulated humification processes, with the degree of enhancement depending on the application rate. The applied PS contained a high proportion of aliphatic compounds, but only steroids and triterpenes accumulated in the HA soil fraction, and this was only observed at low PS rates. These results suggest that the application of PS leads to a dose-dependent increase in alkyl compounds, mainly alkanes and olefins. Aromatic compounds also showed a dose-dependent increase, but not in terms of the demethoxylated compounds typical of mature humic substances found in the original soil. Instead, the increase in aromatics was observed in the form of methoxyphenols, suggesting a recent incorporation of lignin derivatives from crop residues into the HA.
publishDate 2025
format article
status_str publishedVersion
url https://doi.org/10.3390/agronomy15030725
https://hdl.handle.net/10459.1/467748
eu_rights_str_mv openAccess
publisher MDPI
institution Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
collection Recercat. Dipósit de la Recerca de Catalunya
reponame_str Recercat. Dipósit de la Recerca de Catalunya
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
_version_ 1878441238498115584
publishDateSort 2025
author_browse Almendros, Gonzalo
Bosch Serra, Àngela D.
González-Pérez, José-Antonio
Jiménez-de-Santiagoa, Diana E.
publisherStr MDPI
score 6,924472

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