Gênese de solos coesos do leste maranhense: relação solo-paisagem

Dantas, Jussara Silva; Júnior, José Marques; Filho, Marcílio Vieira Martins; Resende, José Maria do Amaral; Camargo, Lívia Arantes; Barbosa, Ronny Sobreira

doi:10.1590/s0100-06832014000400001

Cited by 19 publications

(21 citation statements)

References 30 publications

(39 reference statements)

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“…The mineralogical assemblage was simple, with a predominance of kaolinite in the clay fraction and quartz in the sand fraction (Table 3 and Figure 7), as also reported in other studies (CARVALHO et al, 2013;DANTAS et al, 2014;LIMA NETO et al, 2009;MOREAU et al, 2006;OLIVEIRA et al, 2010;SILVA et al, 2012). Quartz, which is usually found in coarse fractions (sand and silt), was also observed in the clay fraction of all studied soils.…”

Section: Soil Mineralogical Attributessupporting

confidence: 87%

“…These characteristics define cohesive soils (SANTOS et al, 2018). Cohesive soils are usually found in Yellow Ultisols and Oxisols in Coastal Tablelands (CORRÊA et al, , 2015DANTAS et al, 2014;LIMA NETO et al, 2009;MOREAU et al, 2006). Studies reported that these characteristics reduced the vertical flow of water (CORRÊA et al, , 2015LIMA NETO et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…All studied soils were acidic and dystrophic, and the highest SB values were found in superficial horizons probably because of soil management with correctives and fertilizers during the crop cycles (Table 2). Acidity and dystrophy are due to the fact that these soils are developed from sediments of the Barreiras Formation, with a low reserve of cations and predominance of kaolinite DANTAS et al, 2014;LIMA NETO et al 2009;MOREAU et al, 2006). In addition to the lithogenic effect, pedogenic development is strongly affected by the leaching process in view of the high rainfall in the region.…”

Section: Soil Chemical Attributesmentioning

confidence: 99%

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Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

et al. 2019

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Small variations of relief may change drainage and runoff and hence promote the formation of sandy surface horizons and hardened subsurface horizons (fragipans and/or duripans) in Coastal Tablelands soils. This study aimed to investigate the pedogenesis on Coastal Tablelands area with low range altimetry in Paraíba state; secondly, we also sought to contribute to the improvement of the Brazilian Soil Classification System (BSCS). Four soil profiles ware described and collected to be submitted to routine physical and chemical analysis, determination of Fe, Al and Si extracted by sulfuric acid digestion, sodium citratebicarbonate-dithionite and acid ammonium oxalate, sodium pyrophosphate, and mineralogical analysis in the sand and clay fractions by X-ray diffractometry. Optical density of the oxalate extract (ODOE) was also determined; the results were statistically evaluated using the R software. Microrelief variations conditioning differentiated water flows, along with the sandy texture of the surface horizons (A and E) and the lower coarse sand/fine sand ratio in the subsurface horizon, seem to promote clay accumulation in depth in the Spodosols developed on Coastal Tablelands environments. For this soils, the argilluvic (argissólico) character at the subgroup level of the BSCS should be incorporated. In addition, Al amorphous mineral phases and/or poorly crystalline play an important role in the formation of strongly cemented horizons (duripans) of the Spodosols, as also reported by other authors. Finally, the ODOE showed to be an efficient indicator of soils under podzolization process, being possible its use as a taxonomic criterion for classification of Spodosols by the BSCS.

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Section: Soil Mineralogical Attributessupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Soil Chemical Attributesmentioning

confidence: 99%

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Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

et al. 2019

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“…Esse aumento da Ds, mesmo em áreas sem tráfego de máquinas, indica a presença de horizonte genético coeso em condições originais. A evidência de adensamento pedogenético é comumente relacionada a Latossolos desenvolvidos em ambiente de Tabuleiro Costeiro (Giarola et al, 2001;Moreau et al, 2006;Silva & Carvalho, 2007;Corrêa et al, 2008;Lima Neto et al, 2009;Dantas et al, 2014).…”

Section: Tabela 1 Atributos Químicos E Físicos Dos Horizontes Dos Launclassified

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

Fontana

Teixeira

Balieiro

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar os efeitos de diferentes usos da terra nas características e nos atributos de Latossolos da região Oeste do Estado da Bahia. Os Latossolos apresentavam texturas com fração areia amplamente predominante, e foram avaliados em áreas de cerrado, algodão, soja e feijão, no Município de Luís Eduardo Magalhães. A caracterização morfológica e a coleta de amostras de solos para avaliação dos atributos físicos e químicos por horizontes foram feitas em minitrincheiras, enquanto a avaliação da condutividade hidráulica saturada foi feita com permeâmetro de Guelph em duas profundidades: 0,0-0,20 e 0,20-0,40 m. Os Latossolos avaliados, além de uma estrutura maciça, apresentaram horizonte genético adensado, que, sob uso agrícola, torna-se mais compactado, espesso e superficial, e forma torrões quando revolvido. O uso agrícola reduz a condutividade hidráulica saturada dos Latossolos avaliados nas duas camadas, com exceção do cultivo de feijão.Termos para indexação: Cerrado, camada adensada, compactação de solo, condutividade hidráulica saturada, permeâmetro de Guelph, solos leves. Characteristics and attributes of Oxisols under different land uses in the western region of the state of Bahia, BrazilAbstract -The objective of this work was to evaluate the effects of different land uses on the characteristics and attributes of Oxisols in the western region of the state of Bahia, Brazil. The Oxisols had textures with largely predominant sand fraction, and they were evaluated in areas of cerrado, cotton, soybean, and common bean in the municipality of Luís Eduardo Magalhães. The morphological characterization and the collection of samples for evaluating soil physical and chemical attributes of horizons were carried out in small trenches, while the evaluation of field saturated hydraulic conductivity was done using the Guelph permeameter at two depths: 0.0 to 0.20 and 0.20 to 0.40 m. The evaluated Oxisols, besides their massive structure, showed a dense genetic horizon, which, under agricultural use, becomes more compacted, thick, and shallow, forming clods when plowed. Agricultural use reduces the saturated hydraulic conductivity of the evaluated Oxisols in both layers, except for common bean cultivation.

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“…Em ciências agrárias, é comum utilizar-se a comparação visual de padrões de cor conforme a caderneta de Munsell (Soil Color Charts) que, no entanto, apresenta alguma dificuldade de comparação dos resultados, em razão das diferenças de percepção visual entre os avaliadores (Barrón et al, 2000;Campos & Demattê, 2004). Apesar de o sistema Munsell ter sido proposto inicialmente em ciências agrárias, para fins pedológicos na classificação de solos, ele pode ser utilizado para a definição de áreas de manejo específico para as culturas da cana-de-açúcar (Marques Jr. et al, 2014) e da soja (Resende et al, 2014), estudos de gênese de solo (Dantas et al, 2014a), quantificação do potencial de erosão (Dantas et al, 2014a), e identificação de áreas com diferentes potenciais de adsorção de fósforo (Camargo et al, 2015;Peluco et al, 2015).…”

Section: Introductionunclassified

Cor do solo na identificação de áreas com diferentes potenciais produtivos e qualidade de café

Carmo

Júnior

Siqueira

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi verificar a eficácia da cor do solo na identificação de áreas com diferentes potenciais produtivos e qualidade de café, em Argissolo Vermelho-Amarelo desenvolvido de arenito, no Planalto Ocidental Paulista, no Estado de São Paulo. Coletaram-se 173 amostras em 39 ha, para a determinação de matiz, valor, croma e índice de avermelhamento do solo, com base nos dados da espectroscopia de reflectância difusa (ERD). Avaliaram-se, também, a produtividade e a qualidade do fruto de café, e calculou-se o índice de diagnose foliar (DRIS). A maior correlação espacial observada pelo variograma cruzado ocorreu entre matiz e DRIS, em pontos distantes em até 497 m. A menor correlação espacial foi observada em croma e produção, em pontos distantes em até 207 m. As áreas com o maior potencial de produtividade (20 a 33 sacas por hectare) apresentaram matiz entre 6,99 e 7,06, croma entre 5,00 e 5,08 e valor entre 4,40 e 4,45. As áreas com o menor potencial de produtividade (3 a 7 sacas por hectare) apresentaram matiz entre 7,27 e 7,68, croma entre 5,20 e 5,28 e valor entre 4,51 e 4,67. Nestes locais, o teor de argila foi de 16 g kg -1, os teores de P variaram entre 65 e 75 mg dm . O uso da cor determinada por ERD é eficaz para identificar áreas com diferentes potenciais produtivos e qualidade de café, com precisão de 61 a 97%.Termos para indexação: Coffea arabica, cor do solo, geoestatística, pedometria. Soil color for the identification of areas with different yield potential and coffee qualityAbstract -The objective of this work was to verify soil color effectiveness for the identification of areas with different yield potentials and coffee quality, in an Ultisol developed from sandstone, in Planalto Ocidental Paulista, in the state of São Paulo, Brazil. One hundred seventy-three samples were collected from 39 ha, for the determination of hue, value, chroma, and the soil redness index, based on data of diffuse reflectance spectroscopy (DRS). Productivity and quality of coffee fruit were also evaluated, and the leaf diagnosis index (DRIS) was calculated. The highest spatial correlation, observed in the cross variogram, occurred between hue and DRIS in points up to 497 m apart. The lowest spatial correlation was observed for chroma and production, in points spaced by up to 207 m. The areas with the highest yield potential (20 to 33 bags per hectare) showed hue between 6.99 and 7.06, croma between 5.00 and 5.08, and value between 4.40 and 4.45. The areas with the lowest productivity potential (3 to 7 bags per hectare) showed hue between 7.27 and 7.68, chroma between 5.20 and 5.28, and value between 4.51 and 4.67. In these places, clay content was of 16 g kg -1, P levels varied between 65 and 75 mg dm . The use of the color determined by DRS is effective to identify areas with different productive potentials and coffee quality, with 61 to 97% accuracy.

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Gênese de solos coesos do leste maranhense: relação solo-paisagem

Cited by 19 publications

References 30 publications

Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

Cor do solo na identificação de áreas com diferentes potenciais produtivos e qualidade de café

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