Caracterização e gênese do caráter coeso em latossolos amarelos e argissolos dos tabuleiros costeiros do estado de Alagoas

Neto, José de Almeida Lima; Ribeiro, Mateus Rosas; Corrêa, Marcelo Metri; Júnior, Valdomiro Severino de Souza; Lima, José Fernando Wanderley Fernandes; Ferreira, Rafael

doi:10.1590/s0100-06832009000400024

Cited by 30 publications

(9 citation statements)

References 13 publications

(15 reference statements)

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“…This process occurs under natural conditions in soils derived from sediments under strong weathering conditions, specially in transitional mineral horizons, AB or BA, possibly reaching the Bw or Bt horizon (Lima Neto et al 2009). In addition, the low values found for CDW are consistent with kaolinitic mineralogical composition, characteristic of tropical soils (Marques et al 2004).…”

Section: Discussionmentioning

confidence: 99%

“…The association of Feds with clay content in the samples was more expressive in Lixisol and Nitisol, since these orders, particularly Lixisol, exhibit a more accentuated textural gradient (Lima Neto et al 2009). However, since these are secondary forms of Fe, the vertical distribution of Fed was strongly influenced by the action of pedogenetic processes, such as argilluviation (Gabos et al 2014).…”

Section: Acta Amazonicamentioning

confidence: 92%

“…The soil horizons were sampled, with six replicates of deformed samples for laboratory analysis. The physical, chemical and mineralogical attributes commonly used to assess the agricultural potential of soils were determined (Alvarez et al 1999;Nascimento et al 2006;Lima Neto et al 2009;Delarmelinda et al 2017). The physical and chemical attributes of the soils were determined according to Embrapa (1997) …”

Section: Methodsmentioning

confidence: 99%

“…Associations between Fe and organic matter described by Lima Neto et al (2009) limit the crystallinity of secondary iron oxides and probably resulted in the increase in Feo values in surface horizons with higher TOC values, which, in turn, resulted in a large variation in the Feo/Fed ratio in the surface horizons. The decrease in the Feo/Fed ratio with profile depth is associated, among other factors, with the transformation of ferrihydrite into more crystalline Fe oxides, like hematite (Thaymuang et al 2013).…”

Section: Acta Amazonicamentioning

confidence: 99%

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Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

et al. 2018

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The expansion of the agricultural frontier into different geological environments in the west of the state of Pará, northern Brazil, makes it necessary to know the influence of the parent material on local soil attributes. This study aimed to evaluate the influence of different parent materials on five soil profiles along a lithosequence exposed by the BR-163 highway, which runs from north to south through western Pará. The soils were classified, morphologically described and their main horizons sampled for physical, mineralogical and chemical analyses, including the determination of micronutrients, forms of phosphorus and secondary forms of iron. Multivariate analysis was used to group the different soil-parent material associations. The results demonstrated that the diversity of the parent material was a determinant of soil attributes, and was a conditioning factor for the formation of different clay minerals. Multivariate analysis grouped the soils along the lithosequence into a group formed by profiles derived from basic and intermediate igneous rocks, and a second group consisting of profiles derived from sediments and sedimentary rocks. The profile derived from acidic igneous rock showed greater similarity with the profiles derived from sedimentary materials in comparison to those derived from other igneous rocks.KEYWORDS: soil mineralogy, physical attributes, chemical attributes, multivariate analysis Associação entre materiais de origem e atributos de solos ao longo de diferentes ambientes geológicos no oeste do Pará, Brasil RESUMO A expansão da fronteira agrícola em diferentes ambientes geológicos no oeste do Estado do Pará, norte do Brasil, torna necessário conhecer a influência do material de origem sobre os atributos dos solos locais. Este estudo teve como objetivo avaliar a influência de diferentes materiais de origem sobre cinco perfis de solo ao longo de uma litosequência exposta pela rodovia BR-163, que vai de norte a sul pelo oeste do Pará. Os solos foram classificados, morfologicamente descritos e seus principais horizontes amostrados para análises físicas, mineralógicas e químicas, incluindo a determinação de micronutrientes, formas de fósforo e formas secundárias de ferro. Análises multivariadas foram usadas para agrupar as diferentes associações solo-material de origem. Os resultados demonstraram que a diversidade do material de origem foi determinante para os atributos do solo, sendo um fator condicionante para a formação de diferentes argilominerais. A análise multivariada agrupou os solos ao longo da litosequência em um grupo formado por perfis derivados de rochas ígneas básicas e intermediárias, e um segundo grupo constituído por perfis derivados de sedimentos e rochas sedimentares. O perfil derivado de rocha ígnea ácida apresentou maior similaridade com os perfis derivados de materiais sedimentares em comparação àqueles derivados de outras rochas ígneas. PALAVRAS-CHAVE

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Section: Discussionmentioning

confidence: 99%

Section: Acta Amazonicamentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Acta Amazonicamentioning

confidence: 99%

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Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

et al. 2018

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“…These soils have thereafter difficult to cultivate directly related to root growth, which not develop in a dense environment, resulting in reduced growth and crop production (Lima Neto et al, 2009;Moreau et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Least Limiting Water Range in Hardsetting Soils Under Polyacrylamide

Almeida¹,

Marcelo²,

Souza³

et al. 2015

Anais Do III Inovagri International Meeting - 2015

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ABSTRACT:Cohesive soils present agricultural limitations due to its characteristics of being hard to extremely hard when dry and when wet crumble, which reduce available water due to root penetration decreased. So, in coastal plateau, undisturbed soil samples were collected from cohesive horizon of Yellow Ultisol from Northeast of Brazil and saturated with three treatments: T0 Control (water), T1 (PAM, 100 mg kg -1 ) and T2 (PAM and Gypsum CaSO4 2H2O / 1.523 g L -1 ). Analyses of physical and hydraulic soil properties were done: total porosity (macro, meso, micro and criptoporosity), BD; SWRC; soil resistance penetration (RP) and least limiting water range (LLWR). Four replicates per treatment were tested in the randomized block design. Physical-hydric parameters analyzed by ANOVA and to parameters significant at P<0.05 were used Tukey test by SAS, as well as to draw graphs of LLWR.Isolated application of PAM (T1) expanded available water in the soil and range of critical bulk density was increased. Besides that, RP reduced in CC range when compared to T0(control) and T2 (PAM + Gypsum). LLWR is an efficiency indicator to evaluate resilience of hardsetting soil under treatment with polymer to plant available water. Observou-se que a aplicação isolada de PAM (T1) ampliou a disponibilidade de água no solo, estendendo-se a faixa da densidade do solo crítica, reduzindo a RP na faixa que compreende a capacidade de campo (10 à 33 kPa), quando comparado aos tratamentos T0 (controle) e T2 (PAM + Gesso). Os valores do IHO comprovaram a eficiência deste atributo em avaliar a resiliência do solo coeso sob tratamento com polímero, com relação à disponibilidade de água às plantas. KEYWORDS

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