Topolitossequências de solos do Alto Paranaíba: atributos físicos, químicos e mineralógicos

Neto, Fernando Cartaxo Rolim; Schaefer, Carlos Ernesto Gonçalves Reynaud; Filho, Elpídio Inácio Fernandes; Corrêa, Marcelo Metri; Costa, Liovando Marciano da; Parahyba, R. da B. V.; Guerra, Sergio Monthezuma Santoianni; Heck, Richard J.

doi:10.1590/s0100-06832009000600028

Cited by 13 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Fe d /Fe s ratio, which indicates the participation of Fe forms linked to pedogenic Fe oxides in relation to total Fe sulfuric digestion (Fe s ) (Rolim Neto et al, 2009), was low, except for LV 11 . In Oxisols, the ratio should be between 0.8 and 1.0 (Kämpf et al, 1988).…”

Section: Number Of Extractionsmentioning

confidence: 99%

Pedogenic Iron Oxides in Iron-Rich Oxisols Developed from Mafic Rocks

Camêlo

Ker

Fontes

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

Despite the considerable amount of information on the mineralogical characteristics of pedogenic Fe oxides in Brazilian soils, there are few studies on Fe-rich soils developed from mafic rocks with taxonomic identities at lower categorical levels. This study evaluated the mineralogical characteristics of pedogenic Fe oxides in B horizons (Bw) of Fe-rich Oxisols developed from several mafic rocks in the state of Minas Gerais, Brazil. The Bw horizons were sampled at a 0.8-1.0 m depth in 13 Ferric and Perferric Rhodic Oxisols along with a Mesoferric Typic Oxisol originating from basalt, gabbro, tuffite, amphibolite and itabirite in Minas Gerais. The selected soils have taxonomic identities up to the fourth categorical level of the Brazilian System of Soil Classification. In the laboratory, the following analyses were made: a) powder X ray diffraction (XRD) of the clay fraction before and after selective concentration of Fe oxides by silicate alkaline dissolution (5 mol L-1 NaOH); b) selective chemical dissolution of the clay fraction by citrate-bicarbonate-dithionite (CBD), acid ammonium oxalate (AAO), and sulfuric acid (H 2 SO 4 1.8 mol L-1); c) quantitative estimation of minerals in the clay fraction through allocation of phases from the XRD patterns, magnetic susceptibility of the clay fraction, and quantification of elements after sulfuric acid digestion (H 2 SO 4 1:1) of the air-dried fine earth and treatment of the clay fraction with CBD; and d) estimation of the mean crystal size (MCS), specific surface area (SSA), and isomorphic Al-substitution (IS) of hematite, goethite, and maghemite from the XRD patterns obtained from concentrates of Fe oxides. The results showed that estimation of Fe content of maghemite by selective dissolution with 1.8 mol L-1 H 2 SO 4 may not be accurate enough to realistically reflect the maghemite contents in the soil sample. The Al content extracted may also be influenced by other minerals that are sources of this element. Hematite crystals were predominantly placoid in shape in all Rhodic Oxisols and had smaller SSA compared to goethite, which showed both isodimensional and asymmetric habit. Higher crystallinity of maghemite and the IS values generally lower than those of hematite and goethite suggest that in well-drained soils derived from mafic rocks, the IS phenomenon in maghemites seems to result from pedogenetic advancement after its formation from magnetite oxidation.

show abstract

Section: Number Of Extractionsmentioning

confidence: 99%

Pedogenic Iron Oxides in Iron-Rich Oxisols Developed from Mafic Rocks

Camêlo

Ker

Fontes

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

show abstract

“…Microfragments of charcoal are common within aggregates, as well as quartz grains, opaque minerals (magnetite), and gibbsite-hematite nodules ( In the A horizon of the Eutric Chromic Leptic Cambisol (P 2 ) of Serra do Salitre, a strong subrounded granular structure is present, containing abundant grains of nutrient-rich primary minerals, such as K and Mg-rich micaceous fragments (Figure 3a), intergrowth Ti-magnetite (Figure 3b), and intergrowth perovskite/ilmenite grains within larger aggregates (Figure 3c). Microchemical analyses confirm the ultramafic/alkaline nature of the Serra do Salitre soils, in which the micromass composition is rich in 2:1 clay minerals (Rolim Neto et al, 2009), with high, but varying amounts of P, K, Mg, and Ti. Beside K, the presence of Ca/Mg minerals highlights the high nutrient reserve of the Cambisol.…”

Section: Serra Do Salitre Topolithosequencementioning

confidence: 68%

“…Seven soil profiles were selected in three topolithosequences located in the Upper Paranaíba Plateau in the state of Minas Gerais, between the cities of Serra do Salitre (topolithosequence 1), Patrocínio (topolithosequence 2), and Coromandel (topolithosequence 3) (Figure 1), across the geological contact zone between the Bambuí and Araxá Groups, where volcanic materials outcrop as lava or plugs. Cross-sections of the studied topolithosequences are presented by Rolim Neto et al (2009). The regional climate is subtropical Cwb (Köppen Climate Classification System), with mild summers and dry winters (Alvares et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

“…The Brazilian Central Plateau represents the largest agricultural frontier in the tropics (Cerrado region), and some studies have focused on micromorphological aspects of the main regional soils, especially those developed from basalt, sandstone, and Late Tertiary sedimentary covers (Marques, 2000). However, little is known about the micromorphological and microchemical properties of Ferralsols or Cambisols developed from mafic to ultramafic igneous/alkaline volcanic province of the Upper Paranaíba headwaters (Barbosa et al, 1970), although several studies have examined detailed mineralogy of these soils (Carmo et al, 1984;Ferreira et al, 1994;Rolim Neto et al, 2009;Camêlo et al, 2017Camêlo et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Micromorphology and Genesis of Soils from Topolitosequences in the Brazilian Central Plateau

Neto

Schaefer

Camêlo

et al. 2019

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

The micromorphology of deeply weathered soils (Ferralsols/Latossolos) from the Central Plateau of Brazil remains little studied, and its affiliation to different parent materials, poorly known. To clarify the processes of soil formation of these acric, gibbsitic, Fe-oxide rich Ferralsols, three lithotoposequences on local ultrabasic to basic intrusive rocks were studied. The influences of mixing and pedobioturbation are evident in all soils, and Ferralsols of the Central Plateau of Brazil are polygenetic, based on the coarse mineral composition, with ultrabasic and metapelitic rock contributions. The typical oxic microstructure with stable microaggregates encompasses a gibbsite/Fe rich micromass with random inclusions of charcoal, allochthonous quartz, Ti-magnetite, and perovskite grains. Shallow Cambisols (Cambissolos) on tuffites also display a similar "oxic" microstructure, but a much lower degree of weathering. These Cambisols possesses apatite, and mafic and pelitic minerals as residuals minerals grains, indicating the polygenetic colluvia mixture of different substrates. The common occurrence of perovskite (CaTiO 3 ) as a residual grain in deep-weathered, acric Ferralsols on ultrabasic rocks, not yet reported in the literature, shows an unusual resistant Ca reserve in oxic soils, though nothing is known about its implications to soil fertility.

show abstract

“…A textura do solo foi um atributo determinante no estabelecimento dos diferentes tipos de uso do solo no TMAP. Os solos com textura média (150 a 350 g kg -1 ) são predominantes (50%), resultado da influência de rochas psamíticas (arenito) como material de origem (FERREIRA et al, 1994;ROLIM NETO et al, 2009); 25% das áreas apresentam textura argilosa (350 a 600 g kg -1 ) e 25% são muito argilosas (> 600 g kg -1 ). Do total de 126 pontos amostrais, cinco foram em áreas de cerrado nativo, sendo três em solos de textura média e dois em solos de textura muito argilosa (Figura 4).…”

Section: Textura Do Solounclassified

Diagnóstico da fertilidade do solo e do nível tecnológico de propriedades rurais no Triângulo Mineiro e Alto Paranaíba

Lima¹

View full text Add to dashboard Cite

sua colaboração na caracterização de solos tropicais via fluorescência de raios-X portátil, pela minuciosa revisão e submissão do manuscrito referente ao capítulo 4 desta tese. À equipe do Laboratório de Solos, LABAS, Angélica Borges pela amizade, auxílio e boas conversas. Ao Manuel, Marinho, Gilda e Jéssica, pela ajuda e orientação. Ao Prof. Dr. Jair Rocha Prado pela sua relevante contribuição na realização e revisão das análises estatísticas. Aos professores Dr. Gilberto Corrêa, Dr. Hamilton Seron e Dra. Denise Santana por todos ensinamentos transmitidos ao longo do curso e, também, aos demais professores do corpo docente do Programa de Pós-Graduação em Agronomia da UFU. Ao Prof. Dr. Hildeu Ferreira da Assunção por todas oportunidades concedidas, pelos ensinamentos, amizade e confiança. Devo muito do que conquistei a você. Minha gratidão! Aos agricultores que aceitaram participar desta pesquisa e que gentilmente abriram as portas de suas propriedades para a nossa equipe. Aos alunos de graduação João Vitor, Danilo, Athos Gabriel, André, Bruno Ozzy, Vinícius, Diogo e Pamela. O auxílio de vocês foi fundamental para a realização deste trabalho. Obrigada pelo grande apoio durante o trabalho de campo. À Profa. Adriane de Andrade Silva que também colaborou com a primeira etapa de amostragem de solo deste trabalho. Muito obrigada! Aos colegas de pós-graduação Camila Carvalho, Thiago Prudente, Raphael Passaglia, Mara Lúcia, Gabriela (Gabi), Camila Borges e Atalita, com quem pude compartilhar muitos momentos de trabalho, estudo, troca de conhecimentos e boas conversas. Aos meus pais, Eleno Duarte de Lima (in memoriam) e Delvina de Melo Pereira Lima meus afetuosos agradecimentos. Devo tudo o que sou e minhas conquistas a vocês que sempre incentivaram meus estudos, pois acreditavam no poder transformador da educação. Obrigada por todo amor, carinho e dedicação! Ao Bruno, meu namorado, meus sinceros agradecimentos pelas sugestões, orientações e ensinamentos, que foram essenciais para a concretização deste trabalho. Agradeço, também, por compreender meu "stress", minha ausência e as minhas dificuldades. Obrigada pelo companheirismo, amor e pelos momentos felizes que compartilhamos nesses últimos anos. Amo você! Às minhas irmãs Polyana e Danyla, que, mesmo à distância, se fazem presentes. Agradeço imensamente pelo apoio, conselhos, amor e amizade. Às minhas queridas e amadas sobrinhas Helena, Letícia e Heloísa: vocês trazem alegria para nossas vidas. Não poderia deixar de incluir o Alessandro R. Assis, meu cunhado favorito. Vocês são meu porto seguro! Aos amigos de Monte Carmelo Andressa, Renata, Ricardo Mirela, Luana Pena, Daniela, Nayra e Everson que integram a minha família Carmelitana. Agradeço pela amizade, companhia e pelo convívio divertido e prazeroso. Às minhas amigas Camila Carvalho, Sandra, Mariza Assunção e Marisa Sousa pela amizade, carinho e por estarem sempre me apoiando e torcendo por mim. A todos que, direta ou indiretamente, contribuíram para a realização deste trabalho.

show abstract

Topolitossequências de solos do Alto Paranaíba: atributos físicos, químicos e mineralógicos

Cited by 13 publications

References 15 publications

Pedogenic Iron Oxides in Iron-Rich Oxisols Developed from Mafic Rocks

Pedogenic Iron Oxides in Iron-Rich Oxisols Developed from Mafic Rocks

Micromorphology and Genesis of Soils from Topolitosequences in the Brazilian Central Plateau

Diagnóstico da fertilidade do solo e do nível tecnológico de propriedades rurais no Triângulo Mineiro e Alto Paranaíba

Contact Info

Product

Resources

About