Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina
The objective of the present study was to describe the relationships between soil physical properties and to identify variables that determine the pore system and hydrological functions which are specifically important in drought prone semiarid marginal croplands. We compared Mollisols under natural vegetation (NV) with their agriculture (AG) pairs in the central Argentinean Dry Pampas to obtain the range of values for variables that characterize the soil pore system. These were total carbon (OC), bulk density (BD), structural instability index (SII), volumetric weight of aggregates (VAW), total porosity (TP), macropores (Ma), saturated hydraulic conductivity (K), infiltration rate (IR), Dexter's S index (S), and least limiting water range (LLWR). To a depth of more than 23 cm, TP and Ma were considerably lower (~ 35% and 50% less, respectively) in AG versus NV. The changes in porosity and pore size resulted in 74% smaller IR and 65% lower K. The S index had mean values of 0.16 and 0.14 for the upper and middle layer respectively in NV; while for AG, these values were significantly lower (0.09 and 0.10, respectively). The LLWR was also lower in AG (21 and 59% less in the upper and middle layer, respectively), due to high soil resistance even at non-limiting BDs (1.17 and 1.32 g cm−3 for AG2 and AG1, respectively). Soil OC was positively correlated with TP, Ma, and S, and negatively correlated with BD and SII. Multiple regression models for S included SII, TP, and clay contents, while for LLWR the variables were OC, TP, and clay plus silt. Thus, these complex soil quality indices can be predicted by using simpler physical parameters, but texture and organic matter also have a strong effect on them. Moreover, our results contribute to a better understanding of the role of texture and organic matter in controlling soil physical quality and for maintaining soil-based ecosystem services.
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Elsevier
2021-06-01
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Subjects: | Suelo, Fisica del Suelo, Utilización de la Tierra, Molisoles, Porosidad del Suelo, Infiltración, Conductividad Hidráulica, Soil, Soil Physics, Land Use, Mollisols, Soil Porosity, Infiltration, Hydraulic Conductivity, |
Online Access: | http://hdl.handle.net/20.500.12123/9261 https://www.sciencedirect.com/science/article/abs/pii/S2352009421000390 https://doi.org/10.1016/j.geodrs.2021.e00394 |
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oai:localhost:20.500.12123-92612021-05-04T15:50:44Z Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina Fernandez, Romina Belmonte, Valeria Quiroga, Alberto Raul Lobartini, Carlos Noellemeyer, Elke Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity The objective of the present study was to describe the relationships between soil physical properties and to identify variables that determine the pore system and hydrological functions which are specifically important in drought prone semiarid marginal croplands. We compared Mollisols under natural vegetation (NV) with their agriculture (AG) pairs in the central Argentinean Dry Pampas to obtain the range of values for variables that characterize the soil pore system. These were total carbon (OC), bulk density (BD), structural instability index (SII), volumetric weight of aggregates (VAW), total porosity (TP), macropores (Ma), saturated hydraulic conductivity (K), infiltration rate (IR), Dexter's S index (S), and least limiting water range (LLWR). To a depth of more than 23 cm, TP and Ma were considerably lower (~ 35% and 50% less, respectively) in AG versus NV. The changes in porosity and pore size resulted in 74% smaller IR and 65% lower K. The S index had mean values of 0.16 and 0.14 for the upper and middle layer respectively in NV; while for AG, these values were significantly lower (0.09 and 0.10, respectively). The LLWR was also lower in AG (21 and 59% less in the upper and middle layer, respectively), due to high soil resistance even at non-limiting BDs (1.17 and 1.32 g cm−3 for AG2 and AG1, respectively). Soil OC was positively correlated with TP, Ma, and S, and negatively correlated with BD and SII. Multiple regression models for S included SII, TP, and clay contents, while for LLWR the variables were OC, TP, and clay plus silt. Thus, these complex soil quality indices can be predicted by using simpler physical parameters, but texture and organic matter also have a strong effect on them. Moreover, our results contribute to a better understanding of the role of texture and organic matter in controlling soil physical quality and for maintaining soil-based ecosystem services. EEA Anguil Fil: Fernández, Romina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Belmonte, Valeria. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina Fil: Quiroga, Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Lobartini, Carlos. Universidad Nacional del Sur. Departamento de Agronomía; Argentina Fil: Noellemeyer, Elke. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina 2021-05-04T14:44:44Z 2021-05-04T14:44:44Z 2021-06-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/9261 https://www.sciencedirect.com/science/article/abs/pii/S2352009421000390 2352-0094 https://doi.org/10.1016/j.geodrs.2021.e00394 eng info:eu-repograntAgreement/INTA/2019-PE-E2-I042-001/2019-PE-E2-I042-001/AR./Uso y gestión eficiente del Agua en Sistemas de Secano info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Geoderma Regional 25 : e00394 (junio de 2021) |
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topic |
Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity |
spellingShingle |
Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity Fernandez, Romina Belmonte, Valeria Quiroga, Alberto Raul Lobartini, Carlos Noellemeyer, Elke Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
description |
The objective of the present study was to describe the relationships between soil physical properties and to identify variables that determine the pore system and hydrological functions which are specifically important in drought prone semiarid marginal croplands. We compared Mollisols under natural vegetation (NV) with their agriculture (AG) pairs in the central Argentinean Dry Pampas to obtain the range of values for variables that characterize the soil pore system. These were total carbon (OC), bulk density (BD), structural instability index (SII), volumetric weight of aggregates (VAW), total porosity (TP), macropores (Ma), saturated hydraulic conductivity (K), infiltration rate (IR), Dexter's S index (S), and least limiting water range (LLWR). To a depth of more than 23 cm, TP and Ma were considerably lower (~ 35% and 50% less, respectively) in AG versus NV. The changes in porosity and pore size resulted in 74% smaller IR and 65% lower K. The S index had mean values of 0.16 and 0.14 for the upper and middle layer respectively in NV; while for AG, these values were significantly lower (0.09 and 0.10, respectively). The LLWR was also lower in AG (21 and 59% less in the upper and middle layer, respectively), due to high soil resistance even at non-limiting BDs (1.17 and 1.32 g cm−3 for AG2 and AG1, respectively). Soil OC was positively correlated with TP, Ma, and S, and negatively correlated with BD and SII. Multiple regression models for S included SII, TP, and clay contents, while for LLWR the variables were OC, TP, and clay plus silt. Thus, these complex soil quality indices can be predicted by using simpler physical parameters, but texture and organic matter also have a strong effect on them. Moreover, our results contribute to a better understanding of the role of texture and organic matter in controlling soil physical quality and for maintaining soil-based ecosystem services. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Suelo Fisica del Suelo Utilización de la Tierra Molisoles Porosidad del Suelo Infiltración Conductividad Hidráulica Soil Soil Physics Land Use Mollisols Soil Porosity Infiltration Hydraulic Conductivity |
author |
Fernandez, Romina Belmonte, Valeria Quiroga, Alberto Raul Lobartini, Carlos Noellemeyer, Elke |
author_facet |
Fernandez, Romina Belmonte, Valeria Quiroga, Alberto Raul Lobartini, Carlos Noellemeyer, Elke |
author_sort |
Fernandez, Romina |
title |
Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
title_short |
Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
title_full |
Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
title_fullStr |
Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
title_full_unstemmed |
Land-use change affects soil hydro-physical properties in Mollisols of semiarid Central Argentina |
title_sort |
land-use change affects soil hydro-physical properties in mollisols of semiarid central argentina |
publisher |
Elsevier |
publishDate |
2021-06-01 |
url |
http://hdl.handle.net/20.500.12123/9261 https://www.sciencedirect.com/science/article/abs/pii/S2352009421000390 https://doi.org/10.1016/j.geodrs.2021.e00394 |
work_keys_str_mv |
AT fernandezromina landusechangeaffectssoilhydrophysicalpropertiesinmollisolsofsemiaridcentralargentina AT belmontevaleria landusechangeaffectssoilhydrophysicalpropertiesinmollisolsofsemiaridcentralargentina AT quirogaalbertoraul landusechangeaffectssoilhydrophysicalpropertiesinmollisolsofsemiaridcentralargentina AT lobartinicarlos landusechangeaffectssoilhydrophysicalpropertiesinmollisolsofsemiaridcentralargentina AT noellemeyerelke landusechangeaffectssoilhydrophysicalpropertiesinmollisolsofsemiaridcentralargentina |
_version_ |
1756008019597983744 |