Atributos físicos do solo e produtividade de milho em resposta a culturas de pré-safra

Neto, Eurico Lucas de Sousa; Andrioli, Itamar; Beutler, Amauri Nelson; Centurion, José Frederico

doi:10.1590/s0100-204x2008000200015

Cited by 29 publications

(16 citation statements)

References 17 publications

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“…Ceres, Viçosa, v. 59, n.6, p. 859-866, nov/dez, 2012 system showed higher values of geometric mean diameter in the layers 0-0.05, 0.05-0.10 and 0.10-0.15 m, and for mean weight diameter in the layers 0-0.05 and 0.05-0.10 m, compared with the conventional planting, which agreed with Calegari et al (2006), who observed the same trend. However, within the type of management itself, it was found that, the depth increases with the diameter of the aggregates, which corroborates the data of Sousa Neto et al (2008) and Salton et al (2008) These authors found that this behavior is due to the organic matter content of the soil, because there is a decrease in the amount of this cementing agent of aggregates with increasing depth.…”

Section: Resultssupporting

confidence: 84%

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: Resultssupporting

confidence: 84%

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

et al. 2012

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“…Souza Neto et al (2008) contribuem no entendimento desse fenômeno ao afirmarem que a Ds é um atributo que pode indicar condições restritivas ao desenvolvimento radicular, em função da umidade do solo, da resistência à penetração e do espaço poroso do solo.…”

Section: Resultsunclassified

Atributos físicos e estoques de carbono do solo sob diferentes usos da terra em Rondônia, Amazônia Sul-Ocidental

et al. 2017

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Objetivou-se estudar o comportamento dos atributos físicos e dos teores e estoques de carbono do solo em sistema agroflorestal multiestratificado (SAF), comparativamente a diferentes modalidades de uso solo, sendo elas o cultivo de cacaueiro sob manejo agroecológico (CAC), pastagem cultivada (PAS) e floresta nativa (FLN). A área de estudo localiza-se na estação experimental da CEPLAC em Ouro do Preto do Oeste, RO. Nos quatro tratamentos foram instaladas, ao acaso, cinco parcelas de 20 m x 30 m. Nessas parcelas, foram coletadas amostras de solo indeformadas e deformadas nas profundidades de 0 a 20 cm e 20 a 40 cm, para determinação dos atributos fiscos e estoque de carbono no solo. Os valores de densidade do solo no SAF, CAC e PAS apresentaram-se elevados e influenciaram negativamente o espaço poroso do solo. Os estoques de C foram influenciados pelos diferentes agroecossistemas, sendo que na camada de 0 a 20 cm foram de (Mg m-3): 24,79 (SAF); 42,71 (CAC); 41,30 (PAS); 36,07 (FLN), e na camada de 20 a 40 cm foram (Mg m-3): 17,26 (SAF); 31,06 (CAC); 22,31 (PAS); 25,49 (FLN). Todos os sistemas avaliados apresentaram resultados esperados para estoque de C no solo, no entanto, arranjos espaciais que favoreçam o aporte de matéria orgânica poderiam contribuir para a elevação dos estoques de carbono do solo em sistemas agroflorestais.

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“…The absence of correlation between the OC availability with GMD and the soil aggregate classes was also found by Almeida et al (2014). However, in the soil there may also be more aggregate stability promoted by increased organic material accumulation (Beutler et al, 2001;Souza et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Hydro-physical properties and organic carbon of a yellow oxysol under different uses

Teixeira¹,

Queiroz²,

Almeida³

et al. 2016

Afr. J. Agric. Res.

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Intensive soil use without a management plan based on its structures and limitations is the main cause of soil erosion and degradation. The physical properties changes of a studied agricultural area are evaluated by comparing with an area that did not suffer any modification caused by human activities, which is considered the ideal soil condition. This research evaluated the alterations in the hydrophysical properties and the organic carbon content of a Eutrophic Yellow Oxysol under different use and management systems in the Triângulo Mineiro, an important agriculture region in Brazil. The systems studied were, Cerrado with typical stricto sensu vegetation preserved for over 30 years; eucalyptus planted about 30 years ago, without fertilizer or cultivation since the implantation period; corn grown under the no tillage system intercropped with pasture; and Brachiaria sp. under no-tillage intercropped with corn, managed with cattle and annually fertilized with turkey litter. The soil bulk density, total porosity, size distribution of the pores, flocculation degree, geometric mean diameter, water infiltration and organic carbon were evaluated. The effects of land use and management system alterations on soil physical properties were similar at both depths, except the geometric mean diameter, which was higher in the surface layer. The eucalyptus and no-tillage systems with corn and pasture recovered the soil organic carbon contents as compared to the preserved Cerrado area, which was more significant in the surface layer. The soil with native Cerrado vegetation presented faster infiltration in relation to other systems followed by, in descending order, the areas planted with eucalyptus, pasture and corn. The infiltration rate and cumulative infiltration curves were similar to values obtained in the field.

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Atributos físicos do solo e produtividade de milho em resposta a culturas de pré-safra

Cited by 29 publications

References 17 publications

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

Atributos físicos e estoques de carbono do solo sob diferentes usos da terra em Rondônia, Amazônia Sul-Ocidental

Hydro-physical properties and organic carbon of a yellow oxysol under different uses

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