Atributos físicos relacionados à compactação de solos sob vegetação nativa em região de altitude no Sul do Brasil

Luciano, Rodrigo Vieira; Albuquerque, Jackson Adriano; Costa, André da; Batistella, Bruno; Warmling, Maria Tereza

doi:10.1590/s0100-06832012000600007

Cited by 39 publications

(27 citation statements)

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“…This way, soil density elevation comes from grain-size related factors such as a large amount of fine sand (FS) within total sand fraction in contrast to the other fractions as medium sand fraction (MS), coarse sand (CS) and very coarse sand (VCS) ( Table 1). This result validate the findings of LUCIANO et al (2012), who worked with two Humic Cambisols and two Litholic Neosols (Humic Litholic Nitosol and Dystrophic Litholic Neosol). Soil total porosity (Pt), which is another important indicative of soil quality, was also not influenced by TWW applications in this present study.…”

Section: Resultssupporting

confidence: 90%

Soil physical attributes in chemigated banana plantation with wastewater

et al. 2015

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ABSTRACT:The feasibility of using sewage wastewater as a water and nutrient source for plants is an alternative to harness agricultural natural resource, observing its influence on the organic matter dynamics and soil energy. Our objective here was to evaluate the effects of applying different doses of effluent from a sewage treatment plant, in Janaúba -MG, Brazil, over the physical attributes of a soil grown with "Prata Anã" banana. From soil sample collection at depths of 0-20, 20-40, and 40-60 cm, we determined the following soil properties: soil density, total porosity, macroporosity, microporosity, organic matter, clay dispersed in water and stability of soil aggregate. The experimental design was in randomized blocks with four repetitions. Wastewater raising doses promoted increase in suspended solids, contributing to macroporosity reduction at 20-40 and 40-60 cm depths; as well as a reduction in organic matter within 0-20 cm layer. Clay dispersal was observed in the depths of 0-20 cm, being derived from an increase in sodium content. Concurrently, there was a reduction of soil aggregate stability. KEYWORDS:Musa spp, agricultural reuse of effluents, environmental sanitation, semi-arid. ATRIBUTOS FÍSICOS DO SOLO EM BANANAL FERTIRRIGADO COM ÁGUARESIDUÁRIA SANITÁRIA TRATADA RESUMO: A utilização de água residuária proveniente do tratamento de esgoto, como fonte hídrica e nutricional para as plantas, é uma alternativa para racionalizar o aproveitamento do recurso natural na agricultura, observando-se sua influência sobre a dinâmica da matéria e da energia no solo. O objetivo deste trabalho foi avaliar os efeitos da aplicação de diferentes doses de efluente da estação de tratamento de esgoto de Janaúba -MG, sobre os atributos físicos de um solo cultivado com banana 'Prata-Anã'. A partir da coleta de amostras de solo, nas profundidades de 0-20; 20-40 e 40-60 cm, foram avaliados os seguintes atributos: densidade do solo, porosidade total, macroporosidade, microporosidade, matéria orgânica, argila dispersa em água e a estabilidade de agregados do solo. O delineamento experimental foi o em blocos casualizados, com quatro repetições. O aumento das doses de água residuária sanitária tratada no solo promove: a) Incremento nos sólidos suspensos aportados ao solo, o que contribui para a redução da macroporosidade nas profundidades de 20-40 e 40-60 cm do solo; b) Redução da matéria orgânica na profundidade de 0-20 cm do solo; c) Aumento do aporte de sódio, o que determina a dispersão de argilas na profundidade de 0-20 cm, e d) Redução da estabilidade de agregados do solo.

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Section: Resultssupporting

confidence: 90%

Soil physical attributes in chemigated banana plantation with wastewater

et al. 2015

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“…proporcional desses parâmetros que também foi verificado por Braida et al (2006) Luciano et al (2012) observaram uma faixa mais ampla de 1,02 a 1,81 g cm -3 para Dsmáx e de 0,14 a 0,48 g g -1 para Ugc, na camada de 5 a 10 cm, ao analisarem Neossolos, Nitossolos, e Cambissolos. Os autores relataram que a variação na Dsmáx foi maior nos solos com menor teor de carbono orgânico total (12 a 40 g kg -1 ).…”

Section: Resultsunclassified

“…Pois com o aumento no teor de água, ocorre redução da coesão. A água atua como lubrificante entre as partículas de solo, permitindo o deslizamento e o empacotamento das partículas quando este é submetido a algum tipo de pressão (Luciano et al, 2012).…”

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“…Uma dessas relações também foi verificada por Beutler et al (2005) Luciano et al (2012) a Dsmáx de distintas classes de solo decresce na seguinte ordem: Neosssolo Litólico distrófico, Cambissolo Húmico alumínico, Nitossolo Bruno distrófico, Nitossolo Vermelho alumínico e Neossolo Litólico húmico. A explicação para isso conforme os autores é o fato de que, a Dsmáx aumenta com o teor de areia total e areia fina e reduz com os teores de argila.…”

Section: Introductionunclassified

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Ensaio de compactação em Latossolo cultivado com milho sob diferentes períodos de adoção de tipos de manejo

Rossetti

Centurion

2015

Agraria

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RESUMODevido à necessidade de se mitigar a compactação do solo, sugere-se o uso preliminar do ensaio de Proctor para a obtenção de valores de referência. E para isso objetivou-se avaliar a influência dos sistemas e períodos de adoção de tipos de manejo por meio da densidade máxima e correlacionar a densidade relativa com o rendimento de grãos de milho e com outros atributos físicos do solo. O delineamento experimental usado foi o de blocos ao acaso, em parcelas subdivididas, com seis repetições, três camadas (0-0,10; 0,10-0,20 e 0,20-0,30) e os tratamentos foram: semeadura direta por 6 anos (SD6), SD8, SD10, respectivamente, preparo convencional (SC) e uma área adjacente de mata nativa (MN). Observou-se que o comportamento das curvas de compactação do solo foi o mesmo em todas as camadas e manejos. Nos Latossolos Vermelhos de textura média, as operações mecanizadas com os tipos de manejo estudados podem ser efetuadas na faixa de umidade 0,14 a 0,20 kg kg -1 sem causar degradação física. Palavras-chave: aeração do solo, matéria orgânica do solo, Proctor normal, Zea mays Soil compaction test in an Oxisol as affected by maize crop managed by different soil tillages ABSTRACTDue to the need for avoiding soil compaction, preliminary use of the proctor test is suggested to obtain reference values. For that purpose, the aim was to evaluate the effect of the systems and time periods of adoption of management techniques by means of maximum density and correlate relative density with maize yield and the others physical attributes of the soil. A completely randomized block design was used in split-plots with six replications and three soil layers (0-0.10, 0.10-0.20 and 0.20-0.30) and the treatments were: no-till planting for 6 years (NT6), NT8, NT10, respectively, conventional tillage system (CT) and an adjacent native forest area (NF). The results showed that the behavior of soil compaction curves was similar in all layers of all treatments. On the Red Oxisol under study, the mechanical operations required for the management systems can be performed in a moisture content 0.14-0.20 kg kg -1 , without causing physical degradation.

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“…In the constructed minesoil, the aggregation results are likely also derived from soil particle cohesion, due to intense machine traffic carried out in soil construction, as already discussed by Stumpf et al (2014). This type of condition was also reported in minesoils by Sencindiver and Ammons (2000) and in agricultural soils by Rev Bras Cienc Solo 2016;40:e0150482 Voorhees (1983), Carpenedo and Mielniczuk (1990), Topp et al (1997), Bergamin et al (2010), and Conte et al (2011).The soil used in recomposition of the mined area can reach its final construction stage in varying degrees of disintegration and compaction (Akala and Lal, 2001), and the use of machines at soil moisture close to the plastic limit is the main factor that causes compaction, since water reduces cohesion and acts as a lubricant between soil particles, allowing sliding and packing of particles when the soil is subjected to some sort of pressure (Luciano et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Reclamation of a Degraded Coal-Mining Area with Perennial Cover Crops

Pauletto

Stumpf

Pinto

et al. 2016

Rev. Bras. Ciênc. Solo

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Studies addressing the potential of grass roots in improving the structural quality of constructed minesoils are not frequent in the literature, although they are essential for understanding the re-establishment of soil functions in the environment. The objective of this study was to quantify the root attributes of the species Urochloa humidicola, Panicum maximum, and Urochloa brizantha and relate them to the physical properties of a constructed minesoil in reclamation of an area degraded by coal mining. The study was performed in a field experiment in a coal mining area located in southern Brazil. Soil samples were collected, five years after experiment installation, to determine bulk density, macroporosity, distribution of water stable aggregates expressed in different size classes, mean weight diameter of water stable aggregates, and organic carbon content, as well as for chemical characterization. Root sampling was performed by the monolith method to a depth of 0.30 m. Results confirm the hypothesis that the root system of the perennial grasses studied positively contributes to recovery of the constructed minesoil in the 0.00-0.10 m layer after 58 months of revegetation. The higher percentage of large aggregates, higher bulk density, and lower macroporosity in the subsurface indicate the presence of degraded layers, negatively influencing the development of the grass root system. Urochloa brizantha exhibited the largest root matter in the surface layer, influencing the breakdown of the large and cohesive aggregates, transforming them into smaller crumbly aggregates. In the 0.10-0.20 m layer, Urochloa humidicola showed greater volume and root length in relation to other species; nevertheless, changes in soil physical properties were not observed, showing that the time span of the root growth of the species was not sufficient to provide improvements in the subsurface layers.

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Atributos físicos relacionados à compactação de solos sob vegetação nativa em região de altitude no Sul do Brasil

Cited by 39 publications

References 28 publications

Soil physical attributes in chemigated banana plantation with wastewater

Soil physical attributes in chemigated banana plantation with wastewater

Ensaio de compactação em Latossolo cultivado com milho sob diferentes períodos de adoção de tipos de manejo

Reclamation of a Degraded Coal-Mining Area with Perennial Cover Crops

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