Estoque de carbono e atributos físicos de um Latossolo em cronossequência sob diferentes manejos

Rossetti, Karina de Vares; Centurion, José Frederico

doi:10.1590/1807-1929/agriambi.v19n3p252-258

Cited by 19 publications

(19 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Altas concentrações de cobertura vegetal verificadas in loco sob o uso do feijão Guandu pode ter favorecido aos maiores teores de CO. Esse resultado difere do proposto por Rossetti et al (2015), ao determinar o efeito do sistema plantio direto sobre os estoque de carbono e atributos físicos do solo cultivados com soja e milho, e comparação com a mata nativa, identificaram maior concentração de MO sob mata nativa em relação aos demais tratamentos, ao qual os autores associam à deposição contínua de serrapilheira, além da ausência de ação antrópica.…”

Section: Resultsunclassified

Atributos físicos e estoque de carbono do solo em áreas de Terra Preta Arqueológica da Amazônia

et al. 2017

View full text Add to dashboard Cite

RESUMOPara se avaliar a qualidade do solo e a sustentabilidade em ambientes de Terra Preta Arqueológica da Amazônia, é importante a caracterização dos impactos de uso de solo dos diferentes tipos de cobertura. Sendo assim, o objetivo deste trabalho foi avaliar os atributos físicos e o carbono orgânico em áreas de Terra Preta Arqueológica, no município de Novo Aripuanã, AM, sob os cultivos feijão guandu (Cajanus cajan) e pastagem, em comparação com a cobertura de floresta, com base em técnicas de estatística tradicional univariada e multivariada e de geoestatística. Para isso foram delimitadas malhas com espaçamentos regulares e 88 pontos amostrais georreferenciados por malha. Foram coletadas amostras em blocos de solo com estrutura preservada e anéis volumétricos, para a determinação das propriedades físicas e do carbono orgânico do solo. O feijão guandu e pastagem diferem estatisticamente da floresta, que apresentaram características de estabilidade dos agregados acima da média, mas características texturais e carbono orgânico abaixo da média. O modelo exponencial, pelo semivariograma escalonado, mostrou que atributos físicos do solo apresentaram predominância, com grau de dependência de forte a moderado, sendo a área sob feijão guandu com maior variabilidade dos atributos do solo.Palavras-chave: Aripuanã, química e física do solo, TPA sob floresta, usos do solo. Physical attributes and carbon stock of soils of Archaeological DarkEarth of the Amazonia ABSTRACTIn order to evaluate soil quality and sustainability in Amazon Archaeological Dark Earth environments, it is important to characterize the impacts of the use of different cover types. The objective of this work was therefore to evaluate the physical attributes and organic carbon content in areas of "Terra Preta Arqueológica", in the municipality of Novo Aripuanã, AM, under the cultivation of pigeon pea (Cajanus cajan) and pasture, in comparison with forest

show abstract

Section: Resultsunclassified

Atributos físicos e estoque de carbono do solo em áreas de Terra Preta Arqueológica da Amazônia

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Associated with the decrease in TP observed in EU02 and PAST, macroporosity was also reduced (Tables 2 and 3). In CER and EU15, macroporosity approached the minimum threshold allowing the liquid and gaseous exchange between the external environment and the soil of 0.10 m 3 m -3 or 10 %, which is considered critical for the growth of most crop roots (Rossetti and Centurion, 2015). For EU02 and PAST, however, the macropore values were considered restrictive.…”

Section: Source Of Variationmentioning

confidence: 99%

Organic Carbon and Physical Properties in Sandy Soil after Conversion from Degraded Pasture to Eucalyptus in the Brazilian Cerrado

Sena

Maltoni

Faria

et al. 2017

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

Soil is currently seen as the most relevant carbon sink and the most effective carbon stabilizer. In contrast, agriculture is the second largest C emitter, after burning of fossil fuels. This organic carbon (OC) introduced into the soil, mainly via organic matter (OM), is essential for several soil properties and plays an extremely important role in sandy soils. The objective of this study was to describe the changes in the amounts and pools of OC and the influence thereof on some physical soil properties in areas converted from pasture to eucalyptus. The following areas were analyzed: a degraded pasture (PAST), two areas of pasture-eucalyptus conversion after 2 and 15 years (EU02 and EU15, respectively) and a preserved Cerrado area (CER) in the east of the state of Mato Grosso do Sul. Soil samples were taken from the 0.00-0.05, 0.05-0.10, and 0.10-0.30 m layers. The OC was measured and analyzed, the carbon pool (CP) calculated, aggregate stability, bulk density (BD), and macro-and microporosity determined, and total porosity (TP) calculated to analyze the influence of land use on soil properties. The experimental design was completely randomized, and four clusters per area were established, with nine subsampling points, for a total of 36 subsamples per area, organized in 20 × 20 m grids, The soil under natural vegetation (preserved Cerrado) was used as a control. The change from CER to commercial cultivation accelerates the process of OC loss (reductions of 25-35 %) and reductions in soil physical quality. In the PAST area, OC was reduced by 30 % in the 0.00-0.05 m layer. Cumulative OC and CP were highest in the 0.00-0.05 m layer and decreased in the deeper layers in all land use treatments. Organic C in the 0.10-0.30 m layer was not influenced by land use, indicating the possibility of OC persistence in the soil for longer periods. Macroporosity and total porosity may be considered appropriate in CER and EU15, whereas the conditions for plant development in PAST and EU02 were restrictive. Land use systems reduced OC and the CP, indicating anthropogenic disturbance of the soil compared to CER. Fifteen years after planting eucalyptus in the pasture area, signs of recovery of some soil physical properties were observed, e.g., reduced BD and increased TP.

show abstract

“…The non-mobilization of the soil and the constant deposition of organic material are the main factors that contribute to the higher TOC values recorded for this area Rossetti & Centurion, 2015). When compared the tillage systems, the TOC contents were similar for all depths.…”

Section: Resultsmentioning

confidence: 73%

“…Additionally, plowing affects soil structure breaking the connection between aggregates (Bavoso et al, 2010), contributing to organic matter oxidation (Rossetti & Centurion, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Conservation tillage practices, such as no-till, consists of technologies that are used to enhance the sustainability of agricultural systems (Rossetti & Centurion, 2015). These practices include cover cropping; crop rotation, and lower disturbance (Betioli Junior et al, 2012, Hickmann et al, 2012 which reduce organic matter decomposition (Costa et al, 2009;Pragana et al, 2012;Santos et al, 2012) and improve soil structure quality (Fontenele et al, 2009;Silva et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical Atributes of a Oxisol from the Brazilian Cerrado under Different Management Systems

Lobato¹,

Sampaio²,

Nóbrega³

et al. 2017

JAS

View full text Add to dashboard Cite

The tillage systems induce changes in soil structure; modify the porous space, and influence soil water and air dynamics. In this sense, it is important to evaluate these impacts on soil physical quality according to different tillage system with distinct years of implementation. The physical properties of a Oxisol at the Brazilian Cerrado with distinct tillage conditions (conventional, no-till, and a native Cerrado) with different years were compared. The study was conducted at Novo Horizonte farm, at the Cerrado region of southwest Piauí. Soil samples were collected at 0.0-0.10, 0.10-0.20 and 0.20-0.30 m depth in different management systems: no-till with three and five years of implantation (NT3 and NT5, respectively); conventional till with five and nine years (CC5 and CC9, respectively); and a native cerrado area. Were analyzed the aggregate stability in water, soil bulk density, particle density, macro and microporosity, total porosity and total organic carbon. The years of implementation of the tillage systems caused changes in the soil physical properties, which were more evident in the surface layer. Although improved soil physical attributes were observed in no-till after five years of implantation, a longer evaluation time is required for the studied conditions.

show abstract

Estoque de carbono e atributos físicos de um Latossolo em cronossequência sob diferentes manejos

Cited by 19 publications

References 21 publications

Atributos físicos e estoque de carbono do solo em áreas de Terra Preta Arqueológica da Amazônia

Atributos físicos e estoque de carbono do solo em áreas de Terra Preta Arqueológica da Amazônia

Organic Carbon and Physical Properties in Sandy Soil after Conversion from Degraded Pasture to Eucalyptus in the Brazilian Cerrado

Physical Atributes of a Oxisol from the Brazilian Cerrado under Different Management Systems

Contact Info

Product

Resources

About