Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina
The objective of the study was to assess the effect of soil type, land-use and -management on root-C inputs and soil carbon storage in the central semiarid pampa region, Argentina. Twenty-one sites were assessed with different land uses (agriculture, natural grassland and pasture) and textures (sand...
| Autores principales: | , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier
2019
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| Materias: | |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0167198719302879 http://hdl.handle.net/20.500.12123/6319 https://doi.org/10.1016/j.still.2019.05.010 |
| _version_ | 1855483789190365184 |
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| author | Frasier, Ileana Quiroga, Alberto Raul Fernandez, Romina Alvarez, Cristian Gomez, Florencia Noellemeyer, Elke Scherger, Eric Daniel Gili, Adriana |
| author_browse | Alvarez, Cristian Fernandez, Romina Frasier, Ileana Gili, Adriana Gomez, Florencia Noellemeyer, Elke Quiroga, Alberto Raul Scherger, Eric Daniel |
| author_facet | Frasier, Ileana Quiroga, Alberto Raul Fernandez, Romina Alvarez, Cristian Gomez, Florencia Noellemeyer, Elke Scherger, Eric Daniel Gili, Adriana |
| author_sort | Frasier, Ileana |
| collection | INTA Digital |
| description | The objective of the study was to assess the effect of soil type, land-use and -management on root-C inputs and soil carbon storage in the central semiarid pampa region, Argentina. Twenty-one sites were assessed with different land uses (agriculture, natural grassland and pasture) and textures (sand, loamy sand, sandy loam and loam). Root and shoot biomass, and soil properties including texture, total C and N, particulate C, mineral associated C, pH, bulk density and available phosphorus were determined. Results showed that land use conditioned the magnitude of C input in the system while texture limited C storage. Higher root to shoot ratio (5.1–7.6:1) was observed in natural grassland than in pasture (2–4.2:1) and agriculture (0.6−1:1). Positive linear relationships were found between soil C and silt plus clay content with increments of C storage of 4, 2 and 1% under natural grassland, pasture and agriculture respectively. Linear and saturation models were performed for the relationship between soil organic matter and root-C for each soil type and the first 0.20m depth. Sandy loam soils achieved C saturation level at 65 Mg C ha−1 defined by maximum values under natural grasslands with C storage capacity of 34 Mg C ha−1. Soils with silt plus clay content lower than 20% (sand and loamy sand textures) also showed an upper limit of 16.6 Mg ha−1 (equivalent to 0.6% C). In contrast, loam soils showed no -saturating behavior (linear response) with increments of 14 Mg C ha−1 per unit of root-C input. Particulate C increased with increasing root-C inputs in loam and sandy loam soils with no change in mineral associated C. The rate at which root-C was transformed to particulate C was 11.8 and 7.3 Mg Cp Mg root-C−1 for loam and sandy loam soils respectively. Our results showed that soil type and climate are crucial for determining C sequestration capacity of soils, and root inputs, more than aboveground biomass, should be considered when deciding appropriate soil management for enhanced C storage. |
| format | Artículo |
| id | INTA6319 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA63192019-11-19T11:56:31Z Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina Frasier, Ileana Quiroga, Alberto Raul Fernandez, Romina Alvarez, Cristian Gomez, Florencia Noellemeyer, Elke Scherger, Eric Daniel Gili, Adriana Utilización de la Tierra Carbono Suelo Land Use Soil Carbon Región Pampeana Semiárida The objective of the study was to assess the effect of soil type, land-use and -management on root-C inputs and soil carbon storage in the central semiarid pampa region, Argentina. Twenty-one sites were assessed with different land uses (agriculture, natural grassland and pasture) and textures (sand, loamy sand, sandy loam and loam). Root and shoot biomass, and soil properties including texture, total C and N, particulate C, mineral associated C, pH, bulk density and available phosphorus were determined. Results showed that land use conditioned the magnitude of C input in the system while texture limited C storage. Higher root to shoot ratio (5.1–7.6:1) was observed in natural grassland than in pasture (2–4.2:1) and agriculture (0.6−1:1). Positive linear relationships were found between soil C and silt plus clay content with increments of C storage of 4, 2 and 1% under natural grassland, pasture and agriculture respectively. Linear and saturation models were performed for the relationship between soil organic matter and root-C for each soil type and the first 0.20m depth. Sandy loam soils achieved C saturation level at 65 Mg C ha−1 defined by maximum values under natural grasslands with C storage capacity of 34 Mg C ha−1. Soils with silt plus clay content lower than 20% (sand and loamy sand textures) also showed an upper limit of 16.6 Mg ha−1 (equivalent to 0.6% C). In contrast, loam soils showed no -saturating behavior (linear response) with increments of 14 Mg C ha−1 per unit of root-C input. Particulate C increased with increasing root-C inputs in loam and sandy loam soils with no change in mineral associated C. The rate at which root-C was transformed to particulate C was 11.8 and 7.3 Mg Cp Mg root-C−1 for loam and sandy loam soils respectively. Our results showed that soil type and climate are crucial for determining C sequestration capacity of soils, and root inputs, more than aboveground biomass, should be considered when deciding appropriate soil management for enhanced C storage. INTA. Centro Regional La Pampa - San Luis. Estación Experimental Agropecuaria Anguil Fil: Frasier, Ileana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Quiroga, Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Fernandez, Romina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Alvarez, Cristian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Gomez, Florencia. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Eric, Scherger. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Noellemeyer, Elke. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina Fil: Gili, Adriana. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina 2019-11-19T11:41:57Z 2019-11-19T11:41:57Z 2019-09-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0167198719302879 http://hdl.handle.net/20.500.12123/6319 0167-1987 https://doi.org/10.1016/j.still.2019.05.010 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Soil & Tillage Research 192 : 134-143 (September 2019) |
| spellingShingle | Utilización de la Tierra Carbono Suelo Land Use Soil Carbon Región Pampeana Semiárida Frasier, Ileana Quiroga, Alberto Raul Fernandez, Romina Alvarez, Cristian Gomez, Florencia Noellemeyer, Elke Scherger, Eric Daniel Gili, Adriana Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title | Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title_full | Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title_fullStr | Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title_full_unstemmed | Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title_short | Soil type, land-use and -management as drivers of root-C inputs and soil C storage in the semiarid pampa region, Argentina |
| title_sort | soil type land use and management as drivers of root c inputs and soil c storage in the semiarid pampa region argentina |
| topic | Utilización de la Tierra Carbono Suelo Land Use Soil Carbon Región Pampeana Semiárida |
| url | https://www.sciencedirect.com/science/article/pii/S0167198719302879 http://hdl.handle.net/20.500.12123/6319 https://doi.org/10.1016/j.still.2019.05.010 |
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