Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia
Large areas of the Patagonian Andean Region with high potential for planting fast-growing exotic conifers, based on the volcanic nature of its soils, are affected by erosion processes. This study aimed to analyse the effects of Pinus ponderosa afforestation on soil organic matter (OM) fractions in n...
| Autores principales: | , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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Elsevier
2021
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/9666 https://www.sciencedirect.com/science/article/abs/pii/S0016706121003451 https://doi.org/10.1016/j.geoderma.2021.115265 |
| _version_ | 1855036253105291264 |
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| author | La Manna, Ludmila Tarabini, Manuela Gomez, Federico Antonio Rostagno, Cesar Mario |
| author_browse | Gomez, Federico Antonio La Manna, Ludmila Rostagno, Cesar Mario Tarabini, Manuela |
| author_facet | La Manna, Ludmila Tarabini, Manuela Gomez, Federico Antonio Rostagno, Cesar Mario |
| author_sort | La Manna, Ludmila |
| collection | INTA Digital |
| description | Large areas of the Patagonian Andean Region with high potential for planting fast-growing exotic conifers, based on the volcanic nature of its soils, are affected by erosion processes. This study aimed to analyse the effects of Pinus ponderosa afforestation on soil organic matter (OM) fractions in non-allophanic volcanic soils and to determine the relationship between organic matter, soil aggregates and erosion processes. The study was conducted along a forested hill slope showing different soil properties according to slope position. OM fractions and aggregate size fractions under different dispersion forces were analysed on 0–5 cm soil samples in rangelands and in 14- and 24-year old plantations on steep and gentle slopes. Simulated rainfall assays were performed to assess
soil erodibility; OM and granulometry of sediments were also studied. Results showed that OM contents, mainly OM labile fractions (i.e., particulate OM, and OM associated with macro and large microaggregates), soil aggregation and the formation of very stable microaggregates were enhanced in the afforested soils. However, soil changes varied depending on the initial soil OM contents and on the age of the plantation, with more erratic and smaller changes in most fertile soils. Although potential erosion rates are lower in plantations than in rangeland soils, the high OM enrichment rates found in sediments imply a high OM loss when the soils remain uncovered. Erosion processes in afforestation involve the removal of microaggregates rich in OM and silt fractions, while in
the rangelands, coarse and very coarse sand single particles are lost. Afforestation replacing degraded rangelands may be a way to control erosion in these highly erodible volcanic soils, as long as the soil remains covered. Otherwise, the loss of soil enriched in OM from the superficial soil could favour soil carbon depletion. |
| format | info:ar-repo/semantics/artículo |
| id | INTA9666 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA96662021-06-25T17:31:56Z Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia La Manna, Ludmila Tarabini, Manuela Gomez, Federico Antonio Rostagno, Cesar Mario Pinus Plantaciones Tierras de Pastos Erosión Cambio de Uso de la Tierra Carbono Orgánico del Suelo Soil Organic Carbon Plantations Rangelands Erosion Land Use Change Región Patagónica Large areas of the Patagonian Andean Region with high potential for planting fast-growing exotic conifers, based on the volcanic nature of its soils, are affected by erosion processes. This study aimed to analyse the effects of Pinus ponderosa afforestation on soil organic matter (OM) fractions in non-allophanic volcanic soils and to determine the relationship between organic matter, soil aggregates and erosion processes. The study was conducted along a forested hill slope showing different soil properties according to slope position. OM fractions and aggregate size fractions under different dispersion forces were analysed on 0–5 cm soil samples in rangelands and in 14- and 24-year old plantations on steep and gentle slopes. Simulated rainfall assays were performed to assess soil erodibility; OM and granulometry of sediments were also studied. Results showed that OM contents, mainly OM labile fractions (i.e., particulate OM, and OM associated with macro and large microaggregates), soil aggregation and the formation of very stable microaggregates were enhanced in the afforested soils. However, soil changes varied depending on the initial soil OM contents and on the age of the plantation, with more erratic and smaller changes in most fertile soils. Although potential erosion rates are lower in plantations than in rangeland soils, the high OM enrichment rates found in sediments imply a high OM loss when the soils remain uncovered. Erosion processes in afforestation involve the removal of microaggregates rich in OM and silt fractions, while in the rangelands, coarse and very coarse sand single particles are lost. Afforestation replacing degraded rangelands may be a way to control erosion in these highly erodible volcanic soils, as long as the soil remains covered. Otherwise, the loss of soil enriched in OM from the superficial soil could favour soil carbon depletion. EEA Esquel Fil: La Manna, Ludmila. Universidad Nacional de la Patagonia San Juan Bosco. Facultad de Ingeniería. Centro de Estudios Ambientales Integrados; Argentina Fil: La Manna, Ludmila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Tarabini, Manuela. Universidad Nacional de la Patagonia San Juan Bosco. Facultad de Ingeniería. Centro de Estudios Ambientales Integrados; Argentina Fil: Tarabini, Manuela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gómez, Federico Antonio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agroforestal Esquel; Argentina Fil: Gómez, Federico Antonio. Universidad Nacional de la Patagonia San Juan Bosco. Facultad de Ingeniería. Centro de Estudios Ambientales Integrados; Argentina Fil: Gómez, Federico Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Rostagno, César Mario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Rostagno, César Mario. Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC-CENPAT); Argentina 2021-06-25T17:10:02Z 2021-06-25T17:10:02Z 2021-06-17 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/9666 https://www.sciencedirect.com/science/article/abs/pii/S0016706121003451 0016-7061 https://doi.org/10.1016/j.geoderma.2021.115265 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Geoderma 403 : 115265 (2021) |
| spellingShingle | Pinus Plantaciones Tierras de Pastos Erosión Cambio de Uso de la Tierra Carbono Orgánico del Suelo Soil Organic Carbon Plantations Rangelands Erosion Land Use Change Región Patagónica La Manna, Ludmila Tarabini, Manuela Gomez, Federico Antonio Rostagno, Cesar Mario Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title | Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title_full | Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title_fullStr | Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title_full_unstemmed | Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title_short | Changes in soil organic matter associated with afforestation affect erosion processes: the case of erodible volcanic soils from Patagonia |
| title_sort | changes in soil organic matter associated with afforestation affect erosion processes the case of erodible volcanic soils from patagonia |
| topic | Pinus Plantaciones Tierras de Pastos Erosión Cambio de Uso de la Tierra Carbono Orgánico del Suelo Soil Organic Carbon Plantations Rangelands Erosion Land Use Change Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/9666 https://www.sciencedirect.com/science/article/abs/pii/S0016706121003451 https://doi.org/10.1016/j.geoderma.2021.115265 |
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