Morfologia de agregados do solo avaliada por meio de análise de imagens

Olszevski, Nelci; Costa, Liovando Marciano da; Filho, Elpídio Inácio Fernandes; Ruíz, Hugo Alberto; Alvarenga, R. C.; Cruz, Jorge

doi:10.1590/s0100-06832004000500012

Cited by 11 publications

(27 citation statements)

References 1 publication

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“…The larger area of soil aggregates in no-tillage may be associated with the organic matter, agreeing with reports by Olzeviski et al (2004). These authors observed that no-tillage tended to larger aggregate areas compared with the conventional system, which uses harrows, moldboard plow, disk plow and disk ripper, since the notillage is a system that causes less damage to the soil structure, and the conventional system, in this case the disk plow, breaks and pulverizes the soil aggregates.…”

Section: Depth (M)supporting

confidence: 88%

“…The conventional tillage had greater value at the depth of 0.05-0.10 m, but did not differ from that recorded at depths of 0.05-0.10, 0.10-0.15 and 0.20-0.30 m, and these did not differ from that at the depth of 0.15-0.20 m. For the no-tillage, the highest value was found at a depth of 0.20-0.30 m, but this value did not differ significantly from the depths of 0-0.05, 0.10-0.15 and 0.15 -020 m. The depth that showed the lowest value of surface roughness was 0.05-0.10 m (Table 4). Olzeviski et al (2004) argued that the index of roundness in management systems that cause less soil disturbance must have lower values, because this index Means followed by the same small letter in the row and capital letter in the column are not significantly different by the tests of F and Tukey (P <0.05). Means followed by the same small letter in the row and capital letter in the column are not significantly different by the tests of F and Tukey (P <0.05).…”

Section: Resultsmentioning

confidence: 99%

“…Cremon (2007) discuss that the use of digital analyses to measure the quality of the soil allows the characterization of the aggregates according to their geometric shapes, using measures and indices of micromorphometry. Olzeviski et al (2004) and Cremon (2007) also argue that the soil structure represents its own constitution, as expressed by the size, shape and distribution, or the arrangement of empty spaces and primary or secondary solid particles.…”

Section: Introductionmentioning

confidence: 99%

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Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application

et al. 2012

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RESUMO Morfologia e estabilidade de agregados de um Latossolo em função do manejo e da gessagemA caracterização morfológica e a estabilidade dos agregados constituem fatores importantes na avaliação dos sistemas de manejo. O objetivo deste trabalho foi avaliar a morfologia e a estabilidade de agregados de um Latossolo Vermelho distroférrico, manejado com plantio direto e plantio convencional, com e sem ação residual de gesso. O delineamento experimental foi em blocos casualizados, arranjado em esquema de parcelas subsubdivididas, em que os tratamentos foram dois sistemas de manejo do solo, (parcelas) e com 0 e 2000 kg ha -1 de gesso (subparcelas) e cinco profundidades (0-0,05, 0,05-0,10, 0,10-0,15, 0,15-0,20 e 0,20-0,30 m) sendo as subsubparcelas, com quatro repetições. A morfologia dos agregados foi determinada por meio de imagens e, posteriormente, avaliada pelo software Quantporo; a estabilidade foi determinada pelo método da via úmida. Os resultados demonstram que o cultivo em sistema plantio direto, com ou sem efeito residual de gesso, proporcionou maiores diâmetros geométricos de agregados. A combinação entre plantio direto e efeito residual de gesso proporcionou agregados mais rugosos. Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application PalavrasMorphological characterization and aggregate stability is an important factor in evaluating management systems. The aim of this paper is to evaluate the stability and morphology of the aggregates of a dystrophic Oxisol managed with no-tillage and conventional tillage with and without the residual action of gypsum. The experimental design was randomized blocks arranged in split-split plot, where the treatments were two soil management systems (plots) with 0 and 2000 kg ha -1 of gypsum (subplots) and five depths (0-0.05, 0.05-0.10, 0.10-0.15, 0.15-0.20 and 0.20-0.30 m) as the subsubplots, with four replications. The aggregate morphology was determined through images and later evaluated by the Quantporo software. Stability was determined by the wet method. The results showed that the no-tillage system, with or without gypsum residual effect, provided the aggregates with the largest geometric diameters. The combination of no-tillage system and the gypsum residual effect provided rougher aggregates.

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Section: Depth (M)supporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application

et al. 2012

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“…This value varies from zero to one and, if it is equal to one, it may imply in complete aggregate roundness. It is calculated by the formula: OLSZEVSKI et al, 2004). Disturbed samples were air dried and sifted through a 2-mm mesh sieve to determine grain size using pipette method, water-dispersible clay (WDC), flocculation degree (DF) and organic matter content (OM).…”

Section: Resultsmentioning

confidence: 99%

“…Such technique, known as morphometry, enables aggregate characterization according to geometric forms (main axes relationship), it can be performed by means of 2D image processing techniques, which have low cost and are easy to handle (CREMON et al, 2011;OLSZEVSKI et al, 2004;VIANA et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Aggregates morphometry in a Latosol (Oxisol) under different soil management systems

et al. 2016

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Changes in soil physical properties are inherent in land use, mainly in superficial layers. Structural alterations can directly influence distribution, stability and especially morphometry of soil aggregates, which hence will affect pore system and the dynamic process of water and air in soil. Among the methods used to measure these changes, morphometry is a complementary tool to the classic methods. The aim of this study was to evaluate structural quality of a Latosol (Oxisol), under different management systems, using morphometric techniques. Treatments consisted of soil under no-tillage (NT); pasture (P), in which both had been cultivated for ten years, and an area under native vegetation (NV -Savannah like vegetation). Aggregates were sampled at depths of 0-0.10 and 0.10-0.20 m, retained on sieves with 9.52 -4.76 mm, 4.76 -1.0mm, 1.0 -0.5mm diameter ranges. Aggregate morphometry was assessed by 2D images from scanner via QUANTPORO software. The analyzed variables were: area, perimeter, aspect, roughness, Ferret diameter and compactness. Moreover, disturbed samples were collected at the same depths to determine particle size, aggregate stability in water, water-dispersible clay, clay flocculation index and organic matter content. It was observed that different soil management systems have modified soil aggregate morphology as well as physical attributes; and management effects' magnitude increased from NT to P. Key words: Image analyses, soil structural quality, conservationist management systems ResumoAs alterações dos atributos físicos do solo, principalmente nas camadas superficiais, são inerentes ao uso do solo. Mudanças estruturais podem influenciar diretamente a distribuição, estabilidade e especialmente a morfometria dos agregados, o que afeta o sistema poroso e todo o processo dinâmico da água e ar no solo. Entre as metodologias que permitem mensurar estas alterações a morfometria apresenta-se como uma ferramenta complementar aos métodos tradicionais. Objetivou-se com esse trabalho avaliar a qualidade estrutural de um Latossolo Vermelho Distroférrico sob diferentes manejos do solo, empregando técnicas morfométricas. Os tratamentos deste estudo foram: o sistema plantio direto (PD), pastagem (P) ambos com dez anos de cultivo e área sob vegetação nativa (VN -Cerrado). Foram amostrados agregados nas camadas de 0-0,10 e 0,10-0,20 m retidos no intervalo de 9,52 -4,76 mm, 4,76 -1,0mm, 1,0 -0,5mm de diâmetro, obtidos por meio de um jogo de peneiras padrão. As análises dos agregados foram realizadas por meio de imagens 2D obtidas via scanner e analisadas com o programa QUANTPORO. As variáveis morfométricas avaliadas foram: Área, Perímetro, Aspecto, Rugosidade, Diâmetro de Ferret e Compacidade. Amostras com estrutura deformada foram coletadas nas mesmas profundidades para as seguintes determinações: granulometria, estabilidade de agregados em água, argila dispersa em água, grau de floculação e o conteúdo da matéria orgânica. Os diferentes sistemas de manejo do solo modificaram a morfometria dos agregado...

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Morphometry and size distribution of aggregates from a Typic Hapludult soil under natural secondary forest, implanted leguminous trees and degraded pasture in the Atlantic coast of Brazil

2020

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Morfologia de agregados do solo avaliada por meio de análise de imagens

Cited by 11 publications

References 1 publication

Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application

Morphology and stability of aggregates of an Oxisol according to tillage system and gypsum application

Aggregates morphometry in a Latosol (Oxisol) under different soil management systems

Morphometry and size distribution of aggregates from a Typic Hapludult soil under natural secondary forest, implanted leguminous trees and degraded pasture in the Atlantic coast of Brazil

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