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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
19/09/2023 |
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Data da última atualização: |
04/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALMEIDA, M. B. F. de; SIMÕES, M.; FERRAZ, R. P. D.; KUCHLER, P. C. |
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Afiliação: |
MATEUS BENCHIMOL FERREIRA DE ALMEIDA, UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO; MARGARETH GONCALVES SIMOES, CNPS; RODRIGO PECANHA DEMONTE FERRAZ, CNPS; PATRICK CALVANO KUCHLER, UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO. |
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Título: |
Avaliação e mapeamento de pastagens com diferentes níveis de degradação a partir de classificação digital de imagens sentinel-2, por meio do algoritmo random forest: estudo de caso de Valença/RJ e arredores. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Revista Foco, v. 16, n. 6, e2106, 2023. |
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DOI: |
https://doi.org/10.54751/revistafoco.v16n6-004 |
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Idioma: |
Português |
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Conteúdo: |
O presente trabalho objetivou desenvolver uma metodologia de avaliação e mapeamento de pastagens com diferentes níveis de degradação, com base em técnicas de Sensoriamento Remoto. Utilizou-se imagens Sentinel-2, índices de vegetação, texturas GLCM e amostras de campo (peso e altura da biomassa das pastagens). O processamento das imagens digitais foi realizado no R e no Google Earth Engine usando o algoritmo random forest. No R, obteve-se informações sobre as imagens mais importantes; e no Google Earth Engine, realizou-se o processamento da série temporal principal. O índice de vegetação NCI foi a imagem mais importante, apresentando correlação de R2 = 0,722 com o peso da biomassa. Os resultados revelaram que na área de estudo tem-se: N1 (52.72%), N2N3 (32.56%) e N4 (14.72%). As acurácias alcançadas foram as seguintes: Acurácia Global = 0,93; Kappa = 0,89; e F-score (N1 = 0,97, N2N3 = 0,93, N4 = 0,88). |
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Palavras-Chave: |
Aprendizado de máquina; Índices de vegetação; Normalized Canopy Index (NCI); Séries temporais; Texturas GLCM. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1156752/1/Avaliacao-e-mapeamento-de-pastagens-com-diferentes-niveis-de-degradacao-2023.pdf
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Marc: |
LEADER 01793naa a2200229 a 4500
001 2156752
005 2023-12-04
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.54751/revistafoco.v16n6-004$2DOI
100 1 $aALMEIDA, M. B. F. de
245 $aAvaliação e mapeamento de pastagens com diferentes níveis de degradação a partir de classificação digital de imagens sentinel-2, por meio do algoritmo random forest$bestudo de caso de Valença/RJ e arredores.$h[electronic resource]
260 $c2023
520 $aO presente trabalho objetivou desenvolver uma metodologia de avaliação e mapeamento de pastagens com diferentes níveis de degradação, com base em técnicas de Sensoriamento Remoto. Utilizou-se imagens Sentinel-2, índices de vegetação, texturas GLCM e amostras de campo (peso e altura da biomassa das pastagens). O processamento das imagens digitais foi realizado no R e no Google Earth Engine usando o algoritmo random forest. No R, obteve-se informações sobre as imagens mais importantes; e no Google Earth Engine, realizou-se o processamento da série temporal principal. O índice de vegetação NCI foi a imagem mais importante, apresentando correlação de R2 = 0,722 com o peso da biomassa. Os resultados revelaram que na área de estudo tem-se: N1 (52.72%), N2N3 (32.56%) e N4 (14.72%). As acurácias alcançadas foram as seguintes: Acurácia Global = 0,93; Kappa = 0,89; e F-score (N1 = 0,97, N2N3 = 0,93, N4 = 0,88).
653 $aAprendizado de máquina
653 $aÍndices de vegetação
653 $aNormalized Canopy Index (NCI)
653 $aSéries temporais
653 $aTexturas GLCM
700 1 $aSIMÕES, M.
700 1 $aFERRAZ, R. P. D.
700 1 $aKUCHLER, P. C.
773 $tRevista Foco$gv. 16, n. 6, e2106, 2023.
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Registro original: |
Embrapa Solos (CNPS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
03/06/2014 |
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Data da última atualização: |
19/10/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
REICHERT, J. M.; BERVALD, C. M. P.; RODRIGUES, M. F.; KATO, O. R.; REINERT, D. J. |
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Afiliação: |
José Miguel Reichert, UFSM; Clóvis Moisés Priebe Bervald, GSI Brazil; Miriam Fernanda Rodrigues, UFSM; OSVALDO RYOHEI KATO, CPATU; Dalvan José Reinert, UFSM. |
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Título: |
Mechanized land preparation in eastern Amazon in fire-free forest-based fallow systems as alternatives to slash-and-burn practices: Hydraulic and mechanical soil properties. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Agriculture, Ecosystems & Environment, v. 192, p. 47-60, July 2014. |
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DOI: |
http://dx.doi.org/10.1016/j.agee.2014.03.046 |
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Idioma: |
Inglês |
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Conteúdo: |
Soils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itself, an effective practice for maintaining structural soil quality in the short term. Soil tillage in the SBSP system decompacts the upper soil layer, which improves all physical indicators, but only in the short term (less than one month). Soil reconsolidates quickly with the lack or reduced effect of organic matter on soil structure and system equilibrium. MenosSoils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itsel... Mostrar Tudo |
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Palavras-Chave: |
Corte e queima; Preparação do solo. |
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Thesagro: |
Estrutura do Solo; Mecânica do Solo; Mecanização; Vegetação Secundária. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02744naa a2200253 a 4500
001 1987507
005 2022-10-19
008 2014 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.agee.2014.03.046$2DOI
100 1 $aREICHERT, J. M.
245 $aMechanized land preparation in eastern Amazon in fire-free forest-based fallow systems as alternatives to slash-and-burn practices$bHydraulic and mechanical soil properties.$h[electronic resource]
260 $c2014
520 $aSoils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itself, an effective practice for maintaining structural soil quality in the short term. Soil tillage in the SBSP system decompacts the upper soil layer, which improves all physical indicators, but only in the short term (less than one month). Soil reconsolidates quickly with the lack or reduced effect of organic matter on soil structure and system equilibrium.
650 $aEstrutura do Solo
650 $aMecânica do Solo
650 $aMecanização
650 $aVegetação Secundária
653 $aCorte e queima
653 $aPreparação do solo
700 1 $aBERVALD, C. M. P.
700 1 $aRODRIGUES, M. F.
700 1 $aKATO, O. R.
700 1 $aREINERT, D. J.
773 $tAgriculture, Ecosystems & Environment$gv. 192, p. 47-60, July 2014.
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