Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.geoderma.2018.11.031 http://hdl.handle.net/11449/185355 |
Resumo: | Zero-tillage (ZT) is being increasingly adopted globally as a conservationist management system due to the environmental and agronomic benefits it provides. However, there remains little information on the tillage effect on soil pore characteristics such as shape, size and distribution, which in turn affect soil physical, chemical and biological processes. X-ray micro Computed Tomography (mu CT) facilitates a non-destructive method to assess soil structural properties in three-dimensions. We used X-ray mu CT at a resolution of 70 mu m to assess and calculate the shape, size and connectivity of the pore network in undisturbed soil samples collected from a long-term experiment (similar to 30 years) under zero tillage (ZT) and conventional tillage (CT) systems in Botucatu, Southeastern Brazil. In both systems, a single, large pore (> 1000 mm(3)) typically contributed to a large proportion of macroporosity, 91% in CT and 97% in ZT. Macroporosity was higher in ZT (19.7%) compared to CT (14.3%). However the average number of pores was almost twice in CT than ZT. The largest contribution in both treatments was from very complex shaped pores, followed by triaxial and acircular shaped. Pore connectivity analysis indicated that the soil under ZT was more connected that the soil under CT. Soil under CT had larger values of tortuosity than ZT in line with the connectivity results. The results from this study indicate that long-term adoption of ZT leads to higher macroporosity and connectivity of pores which is likely to have positive implications for nutrient cycling, root growth, soil gas fluxes and water dynamics. |
id |
UNSP_d1af13fe99cb640e06856cbeaea200de |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/185355 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed TomographyZero tillageMacroporosityPore connectivityNetwork tortuosityPore shapeZero-tillage (ZT) is being increasingly adopted globally as a conservationist management system due to the environmental and agronomic benefits it provides. However, there remains little information on the tillage effect on soil pore characteristics such as shape, size and distribution, which in turn affect soil physical, chemical and biological processes. X-ray micro Computed Tomography (mu CT) facilitates a non-destructive method to assess soil structural properties in three-dimensions. We used X-ray mu CT at a resolution of 70 mu m to assess and calculate the shape, size and connectivity of the pore network in undisturbed soil samples collected from a long-term experiment (similar to 30 years) under zero tillage (ZT) and conventional tillage (CT) systems in Botucatu, Southeastern Brazil. In both systems, a single, large pore (> 1000 mm(3)) typically contributed to a large proportion of macroporosity, 91% in CT and 97% in ZT. Macroporosity was higher in ZT (19.7%) compared to CT (14.3%). However the average number of pores was almost twice in CT than ZT. The largest contribution in both treatments was from very complex shaped pores, followed by triaxial and acircular shaped. Pore connectivity analysis indicated that the soil under ZT was more connected that the soil under CT. Soil under CT had larger values of tortuosity than ZT in line with the connectivity results. The results from this study indicate that long-term adoption of ZT leads to higher macroporosity and connectivity of pores which is likely to have positive implications for nutrient cycling, root growth, soil gas fluxes and water dynamics.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)FAPEG-Goias Research FoundationFAPEMA-Maranhao Research FoundationBBSRC/Newton FundConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Leeds, Sch Earth & Environm, Inst Climate & Atmospher Sci, Leeds LS2 9JT, W Yorkshire, EnglandState Univ Ponta Grosso, Dept Phys, Ponta Grosso, Parana, BrazilUniv Nottingham, Div Agr & Environm Sci, Sutton Bonington Campus, Loughborough, Leics, EnglandSao Paulo State Univ, Dept Crop Sci, Botucatu, SP, BrazilSao Paulo State Univ, Dept Crop Sci, Botucatu, SP, BrazilFAPESP: 2015/50305-8FAPEG-Goias Research Foundation: 2015-10267001479FAPEMA-Maranhao Research Foundation: RCUK-02771/16BBSRC/Newton Fund: BB/N013201/1CAPES: 303726/2015-6CAPES: 88881.119578/2016-01Elsevier B.V.Univ LeedsState Univ Ponta GrossoUniv NottinghamUniversidade Estadual Paulista (Unesp)Galdos, M.Pires, L. F.Cooper, H.Calonego, J. C. [UNESP]Rosolem, C. A. [UNESP]Mooney, S. J.2019-10-04T12:34:49Z2019-10-04T12:34:49Z2019-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1126-1135http://dx.doi.org/10.1016/j.geoderma.2018.11.031Geoderma. Amsterdam: Elsevier Science Bv, v. 337, p. 1126-1135, 2019.0016-7061http://hdl.handle.net/11449/18535510.1016/j.geoderma.2018.11.031WOS:00045676150011157207758732595280000-0003-2001-0874Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeodermainfo:eu-repo/semantics/openAccess2021-10-23T00:00:12Zoai:repositorio.unesp.br:11449/185355Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T00:00:12Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
title |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
spellingShingle |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography Galdos, M. Zero tillage Macroporosity Pore connectivity Network tortuosity Pore shape |
title_short |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
title_full |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
title_fullStr |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
title_full_unstemmed |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
title_sort |
Assessing the long-term effects of zero-tillage on the macroporosity of Brazilian soils using X-ray Computed Tomography |
author |
Galdos, M. |
author_facet |
Galdos, M. Pires, L. F. Cooper, H. Calonego, J. C. [UNESP] Rosolem, C. A. [UNESP] Mooney, S. J. |
author_role |
author |
author2 |
Pires, L. F. Cooper, H. Calonego, J. C. [UNESP] Rosolem, C. A. [UNESP] Mooney, S. J. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Univ Leeds State Univ Ponta Grosso Univ Nottingham Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Galdos, M. Pires, L. F. Cooper, H. Calonego, J. C. [UNESP] Rosolem, C. A. [UNESP] Mooney, S. J. |
dc.subject.por.fl_str_mv |
Zero tillage Macroporosity Pore connectivity Network tortuosity Pore shape |
topic |
Zero tillage Macroporosity Pore connectivity Network tortuosity Pore shape |
description |
Zero-tillage (ZT) is being increasingly adopted globally as a conservationist management system due to the environmental and agronomic benefits it provides. However, there remains little information on the tillage effect on soil pore characteristics such as shape, size and distribution, which in turn affect soil physical, chemical and biological processes. X-ray micro Computed Tomography (mu CT) facilitates a non-destructive method to assess soil structural properties in three-dimensions. We used X-ray mu CT at a resolution of 70 mu m to assess and calculate the shape, size and connectivity of the pore network in undisturbed soil samples collected from a long-term experiment (similar to 30 years) under zero tillage (ZT) and conventional tillage (CT) systems in Botucatu, Southeastern Brazil. In both systems, a single, large pore (> 1000 mm(3)) typically contributed to a large proportion of macroporosity, 91% in CT and 97% in ZT. Macroporosity was higher in ZT (19.7%) compared to CT (14.3%). However the average number of pores was almost twice in CT than ZT. The largest contribution in both treatments was from very complex shaped pores, followed by triaxial and acircular shaped. Pore connectivity analysis indicated that the soil under ZT was more connected that the soil under CT. Soil under CT had larger values of tortuosity than ZT in line with the connectivity results. The results from this study indicate that long-term adoption of ZT leads to higher macroporosity and connectivity of pores which is likely to have positive implications for nutrient cycling, root growth, soil gas fluxes and water dynamics. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-04T12:34:49Z 2019-10-04T12:34:49Z 2019-03-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.geoderma.2018.11.031 Geoderma. Amsterdam: Elsevier Science Bv, v. 337, p. 1126-1135, 2019. 0016-7061 http://hdl.handle.net/11449/185355 10.1016/j.geoderma.2018.11.031 WOS:000456761500111 5720775873259528 0000-0003-2001-0874 |
url |
http://dx.doi.org/10.1016/j.geoderma.2018.11.031 http://hdl.handle.net/11449/185355 |
identifier_str_mv |
Geoderma. Amsterdam: Elsevier Science Bv, v. 337, p. 1126-1135, 2019. 0016-7061 10.1016/j.geoderma.2018.11.031 WOS:000456761500111 5720775873259528 0000-0003-2001-0874 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Geoderma |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1126-1135 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797789267970228224 |