2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Thaís Nascimento Pessoa
  • Miguel Cooper
  • Márcio Renato Nunes
  • Daniel Uteau
  • Stephan Peth
  • Carlos Manoel Pedro Vaz
  • Paulo Leonel Libardi

Organisationseinheiten

Externe Organisationen

  • Universidade de Sao Paulo
  • University of Florida
  • Universität Kassel
  • Embrapa - Empresa Brasileira de Pesquisa Agropecuaria
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Details

OriginalspracheEnglisch
Aufsatznummer105899
FachzeitschriftCATENA
Jahrgang210
Frühes Online-Datum1 Dez. 2021
PublikationsstatusVeröffentlicht - März 2022

Abstract

Structure and porous geometry are dynamic soil parameters that control several soil processes and functions. This study details the differences in the structure of typical Oxisols regarding the clay amount, biological activity, and mineralogy. Combining 2D and 3D image analysis can provide detailed information about the soil structure and porous system. The objectives of this study were: (i) to describe the soil microstructure and degree of microaggregation; (ii) to quantify porosity, soil pore types, and soil pore size distribution using 2D and 3D techniques; and (iii) to better understand the relationship between the porous system and the biological, chemical, mineralogical, and physical properties of the soil. The study considered four Oxisols: Xantic Kandiustox (P1), Rhodic Haplustox (P2), Anionic Acrustox (P3), and Typic Hapludox (P4). The results showed that all Oxisols have some degree of microaggregation. The Rhodic Haplustox (P2) had the most pronounced degree of microaggregation, which reflects the greater biological activity and gibbsite/kaolinite ratio, and lower hematite/(hematite + goethite) ratio compared to the other Oxisols. The pore types found by 2D analysis were complex pores in P1 and P2 and rounded pores in P3 and P4. The 3D analysis showed that P2 and P3 have a more connected porous system compared to the other Oxisols, evidenced by the lower value of the Euler number. The best connectivity values of the porous system were congruent to improved saturated hydraulic conductivity measured in a separate sample set.

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2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties. / Pessoa, Thaís Nascimento; Cooper, Miguel; Nunes, Márcio Renato et al.
in: CATENA, Jahrgang 210, 105899, 03.2022.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Pessoa TN, Cooper M, Nunes MR, Uteau D, Peth S, Vaz CMP et al. 2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties. CATENA. 2022 Mär;210:105899. Epub 2021 Dez 1. doi: 10.1016/j.catena.2021.105899
Pessoa, Thaís Nascimento ; Cooper, Miguel ; Nunes, Márcio Renato et al. / 2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties. in: CATENA. 2022 ; Jahrgang 210.
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note = "Funding Information: The authors would like to thank the funding agencies for scholarship CAPES (Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Finance Code 001) and CNPq (Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - process number: 140126/2017-1). To the agencies Agrisus (Project 2735/19) and FEALQ (Funda??o de Estudos Agr?rios ?Luiz de Queiroz?) for the financial assistance to academic mobility period in Witzenhausen (UniKassel).",
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Download

TY - JOUR

T1 - 2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties

AU - Pessoa, Thaís Nascimento

AU - Cooper, Miguel

AU - Nunes, Márcio Renato

AU - Uteau, Daniel

AU - Peth, Stephan

AU - Vaz, Carlos Manoel Pedro

AU - Libardi, Paulo Leonel

N1 - Funding Information: The authors would like to thank the funding agencies for scholarship CAPES (Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Finance Code 001) and CNPq (Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - process number: 140126/2017-1). To the agencies Agrisus (Project 2735/19) and FEALQ (Funda??o de Estudos Agr?rios ?Luiz de Queiroz?) for the financial assistance to academic mobility period in Witzenhausen (UniKassel).

PY - 2022/3

Y1 - 2022/3

N2 - Structure and porous geometry are dynamic soil parameters that control several soil processes and functions. This study details the differences in the structure of typical Oxisols regarding the clay amount, biological activity, and mineralogy. Combining 2D and 3D image analysis can provide detailed information about the soil structure and porous system. The objectives of this study were: (i) to describe the soil microstructure and degree of microaggregation; (ii) to quantify porosity, soil pore types, and soil pore size distribution using 2D and 3D techniques; and (iii) to better understand the relationship between the porous system and the biological, chemical, mineralogical, and physical properties of the soil. The study considered four Oxisols: Xantic Kandiustox (P1), Rhodic Haplustox (P2), Anionic Acrustox (P3), and Typic Hapludox (P4). The results showed that all Oxisols have some degree of microaggregation. The Rhodic Haplustox (P2) had the most pronounced degree of microaggregation, which reflects the greater biological activity and gibbsite/kaolinite ratio, and lower hematite/(hematite + goethite) ratio compared to the other Oxisols. The pore types found by 2D analysis were complex pores in P1 and P2 and rounded pores in P3 and P4. The 3D analysis showed that P2 and P3 have a more connected porous system compared to the other Oxisols, evidenced by the lower value of the Euler number. The best connectivity values of the porous system were congruent to improved saturated hydraulic conductivity measured in a separate sample set.

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KW - Saturated hydraulic conductivity

KW - Soil mineralogy

KW - X-ray microtomography

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