Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage

Soil organic carbon (SOC) is an important factor for soil quality diagnosis. Physical and chemical fractionation of SOC are useful to characterize SOC, because some fractions are more sensitive indicators of the effects of different management practices. The aims of this study were (i) to determine...

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Autores principales: Salazar Landea, María Paz, Villarreal, Rafael, Lozano, Luis Alberto, Otero, María Florencia, Polich, Nicolás Guillermo, Bellora, Guido Lautaro, Soracco, Carlos Germán
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Agrarias
Carbono orgánico particulado
Ácidos húmicos
Ácidos fúlvicos
Huminas
Estratificación
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/111188
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-111188
record_format dspace
spelling I19-R120-10915-1111882023-05-29T15:08:24Z http://sedici.unlp.edu.ar/handle/10915/111188 issn:1669-9513 Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage Carbono orgánico del suelo. Estratificación y variación espacial de diferentes fracciones en un Argiudol de la Región Pampeana bajo siembra directa Salazar Landea, María Paz Villarreal, Rafael Lozano, Luis Alberto Otero, María Florencia Polich, Nicolás Guillermo Bellora, Guido Lautaro Soracco, Carlos Germán 2020-12 2020-12-21T15:35:30Z en Ciencias Agrarias Carbono orgánico particulado Ácidos húmicos Ácidos fúlvicos Huminas Estratificación Soil organic carbon (SOC) is an important factor for soil quality diagnosis. Physical and chemical fractionation of SOC are useful to characterize SOC, because some fractions are more sensitive indicators of the effects of different management practices. The aims of this study were (i) to determine values of SOC and different fractions of SOC at different depths and positions in an Argiudoll of the Argentinian Pampas under NT, and (ii) to determine the relation between physical and chemical fractions of SOC. In an experimental plot located in Chascomús, we determined SOC content, humic acids (HA), fulvic acids (FA), humins, coarse and fine particulate organic carbon (POCc and POCf) and mineral associated organic carbon (MOC), at different depths and in the row and inter-row. The content of SOC and different SOC fractions, as well as the contribution of each fraction to SOC showed a vertical variation. The contribution of HA and POCc (newer and more labile fractions) to SOC was larger in the surface than in deeper layers, while humins’ (older and more recalcitrant fraction) contribution to SOC increased with depth, and the contribution of FA, POCf and MOC to SOC remained relatively constant. There was no effect of row and inter-row in SOC content and composition. FA content was correlated to POCc, HA content to POCc and POCf and humins to MOC. El carbono orgánico del suelo (COS) es un factor importante para el diagnóstico de la calidad del suelo. El fraccionamiento del COS por métodos físicos y químicos resulta útil para su caracterización, ya que algunas fracciones son más sensibles al efecto de distintas prácticas de manejo. Los objetivos de este trabajo fueron (i) determinar el contenido de COS y de diferentes fracciones del COS a diferentes profundidades y posiciones en un Argiudol bajo siembra directa (SD), y (ii) determinar la relación entre fracciones físicas y químicas del COS. En un ensayo experimental localizado en Chascomús (región pampeana), determinamos COS, ácidos húmicos (AH), ácidos fúlvicos (AF), huminas, carbono orgánico particulado grueso y fino (COPg y COPf) y carbono orgánico asociado a minerales (COM), a distintas profundidades y en el surco y el entre surco. Los contenidos de COS y de las distintas fracciones mostraron distintas distribuciones verticales. La contribución de AH y COPg (fracciones más nuevas y más lábiles) al COS fue mayor en la superficie que en profundidad, mientras que la contribución de las huminas (fracción más vieja y recalcitrante) al COS aumentó en profundidad. La contribución de AF, POCf y COM al COS se mantuvo constante. No hubo efecto de la posición surco y entre surco en el contenido ni en la composición del COS. El contenido de AF se encontró principalmente correlacionado con el COPg, los AH con el COPf, y las huminas con el COM. Facultad de Ciencias Agrarias y Forestales Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Carbono orgánico particulado
Ácidos húmicos
Ácidos fúlvicos
Huminas
Estratificación
spellingShingle Ciencias Agrarias
Carbono orgánico particulado
Ácidos húmicos
Ácidos fúlvicos
Huminas
Estratificación
Salazar Landea, María Paz
Villarreal, Rafael
Lozano, Luis Alberto
Otero, María Florencia
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Soracco, Carlos Germán
Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
topic_facet Ciencias Agrarias
Carbono orgánico particulado
Ácidos húmicos
Ácidos fúlvicos
Huminas
Estratificación
description Soil organic carbon (SOC) is an important factor for soil quality diagnosis. Physical and chemical fractionation of SOC are useful to characterize SOC, because some fractions are more sensitive indicators of the effects of different management practices. The aims of this study were (i) to determine values of SOC and different fractions of SOC at different depths and positions in an Argiudoll of the Argentinian Pampas under NT, and (ii) to determine the relation between physical and chemical fractions of SOC. In an experimental plot located in Chascomús, we determined SOC content, humic acids (HA), fulvic acids (FA), humins, coarse and fine particulate organic carbon (POCc and POCf) and mineral associated organic carbon (MOC), at different depths and in the row and inter-row. The content of SOC and different SOC fractions, as well as the contribution of each fraction to SOC showed a vertical variation. The contribution of HA and POCc (newer and more labile fractions) to SOC was larger in the surface than in deeper layers, while humins’ (older and more recalcitrant fraction) contribution to SOC increased with depth, and the contribution of FA, POCf and MOC to SOC remained relatively constant. There was no effect of row and inter-row in SOC content and composition. FA content was correlated to POCc, HA content to POCc and POCf and humins to MOC.
format Articulo
Articulo
author Salazar Landea, María Paz
Villarreal, Rafael
Lozano, Luis Alberto
Otero, María Florencia
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Soracco, Carlos Germán
author_facet Salazar Landea, María Paz
Villarreal, Rafael
Lozano, Luis Alberto
Otero, María Florencia
Polich, Nicolás Guillermo
Bellora, Guido Lautaro
Soracco, Carlos Germán
author_sort Salazar Landea, María Paz
title Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
title_short Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
title_full Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
title_fullStr Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
title_full_unstemmed Soil organic carbon : Stratification and spatial variation of different fractions in an Argiudoll under no tillage
title_sort soil organic carbon : stratification and spatial variation of different fractions in an argiudoll under no tillage
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/111188
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