Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability
Biochar has been shown as a potential mean to enhance carbon sequestration in the soil. In Brazil, approximately 15% of the produced charcoal is discarded as charcoal fines, which are chemically similar to biochar. Therefore, we aimed to test charcoal fines as a strategy to increase soil carbon sequ...
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doaj-9ad54fa16f8746019499d7ea5e244acb2021-04-02T16:36:16ZengMDPI AGAgronomy2073-43952019-07-019738410.3390/agronomy9070384agronomy9070384Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and BiodegradabilityOtávio dos Anjos Leal0Deborah Pinheiro Dick1José María de la Rosa2Daniela Piaz Barbosa Leal3José A. González-Pérez4Gabriel Soares Campos5Heike Knicker6Catarinense Federal Institute of Technology, Science and Education (IFC), Rua das Rosas s/n, Santa Rosa do Sul 88965-000, BrazilDepartamento de Físico-Química (DFQ), Federal University of Rio Grande do Sul (UFRGS), Avda. Bento Gonçalves, 7712, Porto Alegre 91540-000, BrazilInstituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), Avda. Reina Mercedes, 10, 41012 Seville, SpainDepartamento de Físico-Química (DFQ), Federal University of Rio Grande do Sul (UFRGS), Avda. Bento Gonçalves, 7712, Porto Alegre 91540-000, BrazilInstituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), Avda. Reina Mercedes, 10, 41012 Seville, SpainDepartment Animal and Dairy Science, University of Georgia, River Road 425, Athens, GA 30605, USAInstituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), Avda. Reina Mercedes, 10, 41012 Seville, SpainBiochar has been shown as a potential mean to enhance carbon sequestration in the soil. In Brazil, approximately 15% of the produced charcoal is discarded as charcoal fines, which are chemically similar to biochar. Therefore, we aimed to test charcoal fines as a strategy to increase soil carbon sequestration. Charcoal fines of hardwood <i>Mimosa scabrella</i> were incorporated into a Cambisol down to 10 cm (T1 = 0 and T4 = 40 Mg ha<sup>−1</sup>) in Southern Brazil. Soil samples were collected (0−30 cm) 20 months after charcoal amendment. Soil organic matter (SOM) acid extract, humic acid, fulvic acid, and humin fractions were separated. Solid-state <sup>13</sup>C nuclear magnetic resonance (NMR) spectra from charcoal and SOM in T1 and T4 were obtained before and after 165 days of incubation under controlled conditions. Charcoal increased soil carbon as fulvic (10−20 cm) and humic acids (10−30 cm) and, especially, as humin (0−5 cm), which probably occurred due to the hydrophobic character of the charcoal. The <sup>13</sup>C NMR spectra and mean residence times (MRT) measured from incubation essays indicated that the charred material decomposed relatively fast and MRT of T1 and T4 samples were similar. It follows that the charcoal fines underwent similar decomposition as SOM, despite the high charcoal dose applied to the soil and the high aryl C contribution (78%) to the total <sup>13</sup>C intensity of the charcoal NMR spectra.https://www.mdpi.com/2073-4395/9/7/384field experimentincubation<sup>13</sup>C NMRmean residence timeslow pool |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Otávio dos Anjos Leal Deborah Pinheiro Dick José María de la Rosa Daniela Piaz Barbosa Leal José A. González-Pérez Gabriel Soares Campos Heike Knicker |
spellingShingle |
Otávio dos Anjos Leal Deborah Pinheiro Dick José María de la Rosa Daniela Piaz Barbosa Leal José A. González-Pérez Gabriel Soares Campos Heike Knicker Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability Agronomy field experiment incubation <sup>13</sup>C NMR mean residence time slow pool |
author_facet |
Otávio dos Anjos Leal Deborah Pinheiro Dick José María de la Rosa Daniela Piaz Barbosa Leal José A. González-Pérez Gabriel Soares Campos Heike Knicker |
author_sort |
Otávio dos Anjos Leal |
title |
Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability |
title_short |
Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability |
title_full |
Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability |
title_fullStr |
Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability |
title_full_unstemmed |
Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability |
title_sort |
charcoal fine residues effects on soil organic matter humic substances, composition, and biodegradability |
publisher |
MDPI AG |
series |
Agronomy |
issn |
2073-4395 |
publishDate |
2019-07-01 |
description |
Biochar has been shown as a potential mean to enhance carbon sequestration in the soil. In Brazil, approximately 15% of the produced charcoal is discarded as charcoal fines, which are chemically similar to biochar. Therefore, we aimed to test charcoal fines as a strategy to increase soil carbon sequestration. Charcoal fines of hardwood <i>Mimosa scabrella</i> were incorporated into a Cambisol down to 10 cm (T1 = 0 and T4 = 40 Mg ha<sup>−1</sup>) in Southern Brazil. Soil samples were collected (0−30 cm) 20 months after charcoal amendment. Soil organic matter (SOM) acid extract, humic acid, fulvic acid, and humin fractions were separated. Solid-state <sup>13</sup>C nuclear magnetic resonance (NMR) spectra from charcoal and SOM in T1 and T4 were obtained before and after 165 days of incubation under controlled conditions. Charcoal increased soil carbon as fulvic (10−20 cm) and humic acids (10−30 cm) and, especially, as humin (0−5 cm), which probably occurred due to the hydrophobic character of the charcoal. The <sup>13</sup>C NMR spectra and mean residence times (MRT) measured from incubation essays indicated that the charred material decomposed relatively fast and MRT of T1 and T4 samples were similar. It follows that the charcoal fines underwent similar decomposition as SOM, despite the high charcoal dose applied to the soil and the high aryl C contribution (78%) to the total <sup>13</sup>C intensity of the charcoal NMR spectra. |
topic |
field experiment incubation <sup>13</sup>C NMR mean residence time slow pool |
url |
https://www.mdpi.com/2073-4395/9/7/384 |
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