Title:	Microstructural changes in Oxisols under long-term different management systems.
Authors:	NGOLO, A. O. OLIVEIRA, F. S. de OLIVEIRA, M. F. de FERNANDES, R. B. A.
Affiliation:	ARISTIDES OSVALDO NGOLO CENTRO NACIONAL DE INVESTIGAÇÃO CIENTÍFICA, LUANDA, ANGOLA., CENTRO NACIONAL DE INVESTIGAÇÃO CIENTÍFICA, LUANDA, ANGOLA; FÁBIO SOARES DE OLIVEIRA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; MAURILIO FERNANDES DE OLIVEIRA, CNPMS; RAPHAEL BRAGANÇA ALVES FERNANDES, UNIVERSIDADE FEDERAL DE VIÇOSA.
Date Issued:	2023
Citation:	Revista Brasileira de Ciência do Solo, v. 47, e0230051, 2023.
Description:	There has long been a discussion about the effects of soil management on its structure. Since changes can occur due to management and time of use, more accurate assessments can be achieved if carried out in long-term experiments. This study investigated the long-term effects of soil management on the physical quality of a Cerrado Oxisol (Latossolo Vermelho), focusing on microstructural changes. Micromorphology and computed tomography techniques were used to assess the soil’s microstructure. The study compared areas under long-term and different soil management practices, including disc plowing, no-tillage, and disc harrow+subsoiler. A native Cerrado area was considered as the reference. Micromorphology revealed some changes in the pedological features of soil aggregates, but the granular structure showed good resistance even after two decades of use and management. It also indicated a decrease in larger pores and an increase in the surface soil layer micropores for the disc plowing and no-tillage treatments. These results were consistent with traditional laboratory evaluations of soil porosity. Computed tomography was limited due to increased soil bulk density in the cultivated treatments, but it showed potential for assessing soil porosity and pore connectivity. We concluded that micromorphology effectively identifies microstructural changes in Oxisols with small and strong granular structures, and the granular soil aggregates displayed resilience even after long-term management. The micromorphometric evaluation corroborates with traditional methods and suggests loss of pores associated with the disc harrow+subsoiler treatment.
Thesagro:	Solo
NAL Thesaurus:	Soil Microstructure Soil micromorphology
Keywords:	Microestrutura do solo Morfometria dos poros Microtomografia de raios X Pores morphometry X-ray microtomography
DOI:	https://doi.org/10.36783/18069657rbcs20230051
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMS)