Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco
The sub-humid Chaco region of Argentina, originally covered by dry sclerophyll forest, has been subjected to clearing since the end of the '70 and replacement of the forest by no till farming. Land use changes produced a decrease in aboveground carbon stored in forests, but little is known about the...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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European Geosciences Union
2018
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/4052 https://www.soil-journal.net/4/251/2018/ https://doi.org/10.5194/soil-4-251-2018 |
| _version_ | 1855483151543959552 |
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| author | Osinaga, Natalia Andrea Alvarez, Carina Rosa Taboada, Miguel Angel |
| author_browse | Alvarez, Carina Rosa Osinaga, Natalia Andrea Taboada, Miguel Angel |
| author_facet | Osinaga, Natalia Andrea Alvarez, Carina Rosa Taboada, Miguel Angel |
| author_sort | Osinaga, Natalia Andrea |
| collection | INTA Digital |
| description | The sub-humid Chaco region of Argentina, originally covered by dry sclerophyll forest, has been subjected to clearing since the end of the '70 and replacement of the forest by no till farming. Land use changes produced a decrease in aboveground carbon stored in forests, but little is known about the impact on soil organic C stocks. The aim of this study was to evaluate soil C stocks and C fractions up to 1m depth in soils under different land use: <10yr continuous cropping; >20yr continuous cropping, warm season grass pasture and native forest in 32 sites distributed over the Chaco region. The organic C stock content up to 1m depth expressed as equivalent mass varied as follows: forest (119.3Mgha−1)>pasture (87.9Mgha−1)>continuous cropping (71.9 and 77.3Mgha−1), with no impact of the number of years under cropping. The most sensitive organic carbon fraction was the coarse particle fraction (2000μm–212μm) at 0–5cm and 5–20cm depth layers. Resistant carbon (<53μm) was the main organic matter fraction in all sample categories except in the forest. Organic C stock, its quality and distribution in the profile were sensitive to land use change. The conversion of the Chaco forest to crops was associated to a decrease of Organic C stock up to the meter depth and with the decrease of the labile fraction. The incorporation of pastures of warm-season grasses was able to mitigate the decrease of C stocks caused by cropping and so could be considered a sustainable management practice. As soil organic carbon losses were not restricted to the first few cm of the soil, the development of models that would allow the estimation of soil organic carbon changes in depth would be useful to evaluate with greater precision the impact of land use change on carbon stocks. |
| format | Artículo |
| id | INTA4052 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | European Geosciences Union |
| publisherStr | European Geosciences Union |
| record_format | dspace |
| spelling | INTA40522019-06-13T11:31:44Z Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco Osinaga, Natalia Andrea Alvarez, Carina Rosa Taboada, Miguel Angel Deforestación Utilización de la Tierra Carbono Deforestation Land Use Carbon Soil Organic Carbon Carbono Orgánico del Suelo Región Chaqueña The sub-humid Chaco region of Argentina, originally covered by dry sclerophyll forest, has been subjected to clearing since the end of the '70 and replacement of the forest by no till farming. Land use changes produced a decrease in aboveground carbon stored in forests, but little is known about the impact on soil organic C stocks. The aim of this study was to evaluate soil C stocks and C fractions up to 1m depth in soils under different land use: <10yr continuous cropping; >20yr continuous cropping, warm season grass pasture and native forest in 32 sites distributed over the Chaco region. The organic C stock content up to 1m depth expressed as equivalent mass varied as follows: forest (119.3Mgha−1)>pasture (87.9Mgha−1)>continuous cropping (71.9 and 77.3Mgha−1), with no impact of the number of years under cropping. The most sensitive organic carbon fraction was the coarse particle fraction (2000μm–212μm) at 0–5cm and 5–20cm depth layers. Resistant carbon (<53μm) was the main organic matter fraction in all sample categories except in the forest. Organic C stock, its quality and distribution in the profile were sensitive to land use change. The conversion of the Chaco forest to crops was associated to a decrease of Organic C stock up to the meter depth and with the decrease of the labile fraction. The incorporation of pastures of warm-season grasses was able to mitigate the decrease of C stocks caused by cropping and so could be considered a sustainable management practice. As soil organic carbon losses were not restricted to the first few cm of the soil, the development of models that would allow the estimation of soil organic carbon changes in depth would be useful to evaluate with greater precision the impact of land use change on carbon stocks. Instituto de Suelos Fil: Osinaga, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Alvarez, Carina Rosa. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Fertilidad y Fertilizantes; Argentina Fil: Taboada, Miguel Angel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Fertilidad y Fertilizantes; Argentina 2018-12-10T18:32:32Z 2018-12-10T18:32:32Z 2018 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/4052 https://www.soil-journal.net/4/251/2018/ 2199-3971 2199-398X (Online) https://doi.org/10.5194/soil-4-251-2018 eng info:eu-repo/semantics/openAccess 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 European Geosciences Union SOIL 4 (4) : 251-257. (2018) |
| spellingShingle | Deforestación Utilización de la Tierra Carbono Deforestation Land Use Carbon Soil Organic Carbon Carbono Orgánico del Suelo Región Chaqueña Osinaga, Natalia Andrea Alvarez, Carina Rosa Taboada, Miguel Angel Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title | Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title_full | Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title_fullStr | Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title_full_unstemmed | Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title_short | Effect of deforestation and subsequent land-use management on soil carbon stocks in the South American Chaco |
| title_sort | effect of deforestation and subsequent land use management on soil carbon stocks in the south american chaco |
| topic | Deforestación Utilización de la Tierra Carbono Deforestation Land Use Carbon Soil Organic Carbon Carbono Orgánico del Suelo Región Chaqueña |
| url | http://hdl.handle.net/20.500.12123/4052 https://www.soil-journal.net/4/251/2018/ https://doi.org/10.5194/soil-4-251-2018 |
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