| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
14/06/2022 |
|
Data da última atualização: |
28/09/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; GUIMARAES, M. de F.; MARCHAO, R. L. |
|
Afiliação: |
JOSE FRANCIRLEI DE OLIVEIRA; MICHEL BROSSARD; EDEMAR JOAQUIM CORAZZA, SUCOM; MARIA DE FATIMA GUIMARAES; ROBELIO LEANDRO MARCHAO, CPAC. |
|
Título: |
Field-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazil. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
Geoderma Regional, v. 30, e00532, 2022. |
|
Páginas: |
13 p. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Visible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ́ acrico (Haplic Ferralsol) and a Latossolo Ver- melho distrofico ́ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameters. In addition, the complete spectrum (mainly in 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm) was better spatially correlated with soil properties than the decomposition of the spectrum by the RID. Soil classification and level of dis- cretization as affected by spectral variability were also discussed here. Three soil groups were discriminated mainly by the Ki and Kr indexes and clay content. Moreover, the variability of the spectra was conditioned by the spatial variability of the mentioned variables. The clay content for soils with a discrepant particle size (group 1 compared with groups 2 and 3) and the Ki and Kr indexes for soils with a homogeneous particle size (between groups 2 and 3), associated with the full Vis-NIR spectral analysis, allowed building thematic maps with a good precision, without the need of mathematical models; this was possible by the modification of the reflectance intensity and the size of the concavity of the spectral band. MenosVisible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ́ acrico (Haplic Ferralsol) and a Latossolo Ver- melho distrofico ́ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of so... Mostrar Tudo |
|
Palavras-Chave: |
Diferença de inflexão de refletância; Índices Ki e Kr; Variabilidade espacial do solo. |
|
Thesagro: |
Argila; Espectrometria; Raio Infravermelho; Solo. |
|
Categoria do assunto: |
-- |
|
Marc: |
null
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| 1. |  | TESTA, M.; LUCIANER, E.; ROCHA, E.; BARTZ, M. L. C.; SAMUEL, S. W.; BROWN, G. G.; ESPAGNOLLO, E.; BARETTA, D. Populações de minhocas em áreas sob plantio direto no meio-oeste catarinense. In: REUNIÃO PARANAENSE DE CIÊNCIA DO SOLO, 3., 2013, Londrina. Sistemas conservacionistas de produção e sua interação com a ciência do solo: resumos. Londrina: IAPAR, 2013. p. 250.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
|    |
| 2. | | WADT, P. G. S.; GARDIN, J. P. P.; CARMO, C. C. A. do; WADT, L.; SCHVEITZER, B.; ESPAGNOLLO, E. Recomendação de calagem a adubação na cultura da videira americana cultivada em Santa Catarina. In: WORKSHOP DE CADEIAS DE PRODUÇÃO AGROFLORESTAL PRIORITÁRIAS DA AMAZÔNIA, 1., 2021, Porto Velho. Caminhos da produção agroflorestal na Amazônia: anais. Porto Velho: Núcleo Regional Noroeste SBCS, 2021. p. 153-180. Editores: Luciélio Manoel da Silva; Paulo Guilherme Salvador Wadt; Karina Thais Lima Buriti; Elaine Almeida Delarmelinda Honoré; Marcos Gervasio Pereira.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Rondônia. |
| |
| Registros recuperados : 2 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
