Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina)
The conversion of dry woody rangelands into pastures can alter key soil physical properties that regulate ecosystem water circulation and storage. Based on three paired stands of native woodlands and pastures established 20 years ago in the southern Dry Chaco (San Luis, Argentina), we described contrasts in five soil physical properties using a systematic sampling of soil patches (9 − 18 patches along a single transect within each of the three paired 1-ha stands). Compared with woodlands, pastures displayed flatter microtopography (mean ± standard deviation [SD]: 3.7 ± 0.34 vs. 5.0 ± 0.67% slope; P < 0.05), lower infiltration rate (mean ± SD: 71.6 ± 9.0 vs. 139.9 ± 37.2 mm h− 1; P < 0.05), and higher penetration resistance (mean ± SD: 4.2 ± 0.10 vs. 1.9 ± 0.17 kg cm− 2; P < 0.01) and bulk density (mean ± SD: 1.39 ± 0.05 vs. 1.16 ± 0.04 g cm− 3; P < 0.0001). On average, topsoil water content at field capacity was similar for both types of cover (mean ± SD: 16.3 ± 0.21 vs. 17.1 ± 1.12%, pastures and woodlands, respectively; P = 0.29). However, at similar bulk density values, pastures presented a ~ 20% reduction in volumetric water content at field capacity (16.3%) compared with woodlands (19.7%). The establishment of pastures led to more homogenous soils, with most variables having reduced spatial variability in comparison with woodlands. Our observations showed how the conversion of native woodlands to pastures produced strong physical changes in the soils of Dry Chaco and help to understand the mechanisms that are most likely influencing the surface-soil water dynamics of these, and perhaps other, dry rangelands.
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2017-03
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Subjects: | Pastizales, Propiedades Físico - Químicas Suelo, Formación Boscosa, Tierras de Pastos, Pastures, Soil Chemicophysical Properties, Woodlands, Rangelands, Chaco Arido, San Luis, |
Online Access: | https://www.sciencedirect.com/science/article/pii/S1550742416300719#! http://hdl.handle.net/20.500.12123/2113 https://doi.org/10.1016/j.rama.2016.08.003 |
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oai:localhost:20.500.12123-21132019-03-27T13:54:48Z Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) Magliano, Patricio Nicolás Fernandez, Roberto J. Florio, Eva Laura Murray, Francisco Jobbagy Gampel, Esteban Gabriel Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis The conversion of dry woody rangelands into pastures can alter key soil physical properties that regulate ecosystem water circulation and storage. Based on three paired stands of native woodlands and pastures established 20 years ago in the southern Dry Chaco (San Luis, Argentina), we described contrasts in five soil physical properties using a systematic sampling of soil patches (9 − 18 patches along a single transect within each of the three paired 1-ha stands). Compared with woodlands, pastures displayed flatter microtopography (mean ± standard deviation [SD]: 3.7 ± 0.34 vs. 5.0 ± 0.67% slope; P < 0.05), lower infiltration rate (mean ± SD: 71.6 ± 9.0 vs. 139.9 ± 37.2 mm h− 1; P < 0.05), and higher penetration resistance (mean ± SD: 4.2 ± 0.10 vs. 1.9 ± 0.17 kg cm− 2; P < 0.01) and bulk density (mean ± SD: 1.39 ± 0.05 vs. 1.16 ± 0.04 g cm− 3; P < 0.0001). On average, topsoil water content at field capacity was similar for both types of cover (mean ± SD: 16.3 ± 0.21 vs. 17.1 ± 1.12%, pastures and woodlands, respectively; P = 0.29). However, at similar bulk density values, pastures presented a ~ 20% reduction in volumetric water content at field capacity (16.3%) compared with woodlands (19.7%). The establishment of pastures led to more homogenous soils, with most variables having reduced spatial variability in comparison with woodlands. Our observations showed how the conversion of native woodlands to pastures produced strong physical changes in the soils of Dry Chaco and help to understand the mechanisms that are most likely influencing the surface-soil water dynamics of these, and perhaps other, dry rangelands. EEA San Luis Fil: Magliano, Patricio Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis; Argentina Fil: Fernandez, Roberto J.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Florio, Eva L. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis; Argentina Fil: Murray, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis. Agencia de Extensión Rural San Luis; Argentina Fil: Jobbagy Gampel, Esteban Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis; Argentina 2018-03-23T18:16:30Z 2018-03-23T18:16:30Z 2017-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S1550742416300719#! http://hdl.handle.net/20.500.12123/2113 1550-7424 1551-5028 https://doi.org/10.1016/j.rama.2016.08.003 eng info:eu-repo/semantics/restrictedAccess application/pdf Rangeland ecology & management 70 (2) : 225-229. (March 2017) |
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Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis |
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Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis Magliano, Patricio Nicolás Fernandez, Roberto J. Florio, Eva Laura Murray, Francisco Jobbagy Gampel, Esteban Gabriel Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
description |
The conversion of dry woody rangelands into pastures can alter key soil physical properties that regulate ecosystem water circulation and storage. Based on three paired stands of native woodlands and pastures established 20 years ago in the southern Dry Chaco (San Luis, Argentina), we described contrasts in five soil physical properties using a systematic sampling of soil patches (9 − 18 patches along a single transect within each of the three paired 1-ha stands). Compared with woodlands, pastures displayed flatter microtopography (mean ± standard deviation [SD]: 3.7 ± 0.34 vs. 5.0 ± 0.67% slope; P < 0.05), lower infiltration rate (mean ± SD: 71.6 ± 9.0 vs. 139.9 ± 37.2 mm h− 1; P < 0.05), and higher penetration resistance (mean ± SD: 4.2 ± 0.10 vs. 1.9 ± 0.17 kg cm− 2; P < 0.01) and bulk density (mean ± SD: 1.39 ± 0.05 vs. 1.16 ± 0.04 g cm− 3; P < 0.0001). On average, topsoil water content at field capacity was similar for both types of cover (mean ± SD: 16.3 ± 0.21 vs. 17.1 ± 1.12%, pastures and woodlands, respectively; P = 0.29). However, at similar bulk density values, pastures presented a ~ 20% reduction in volumetric water content at field capacity (16.3%) compared with woodlands (19.7%). The establishment of pastures led to more homogenous soils, with most variables having reduced spatial variability in comparison with woodlands. Our observations showed how the conversion of native woodlands to pastures produced strong physical changes in the soils of Dry Chaco and help to understand the mechanisms that are most likely influencing the surface-soil water dynamics of these, and perhaps other, dry rangelands. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Pastizales Propiedades Físico - Químicas Suelo Formación Boscosa Tierras de Pastos Pastures Soil Chemicophysical Properties Woodlands Rangelands Chaco Arido, San Luis |
author |
Magliano, Patricio Nicolás Fernandez, Roberto J. Florio, Eva Laura Murray, Francisco Jobbagy Gampel, Esteban Gabriel |
author_facet |
Magliano, Patricio Nicolás Fernandez, Roberto J. Florio, Eva Laura Murray, Francisco Jobbagy Gampel, Esteban Gabriel |
author_sort |
Magliano, Patricio Nicolás |
title |
Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
title_short |
Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
title_full |
Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
title_fullStr |
Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
title_full_unstemmed |
Soil physical changes after conversion of woodlands to pastures in dry Chaco rangelands (Argentina) |
title_sort |
soil physical changes after conversion of woodlands to pastures in dry chaco rangelands (argentina) |
publishDate |
2017-03 |
url |
https://www.sciencedirect.com/science/article/pii/S1550742416300719#! http://hdl.handle.net/20.500.12123/2113 https://doi.org/10.1016/j.rama.2016.08.003 |
work_keys_str_mv |
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1756007085867270145 |