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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
14/06/2022 |
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Data da última atualização: |
14/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; GUIMARÃES, M. F.; MARCHAO, R. L. |
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Afiliação: |
JOSE FRANCIRLEI DE OLIVEIRA; MICHEL BROSSARD; EDEMAR JOAQUIM CORAZZA, SPD; MARIA DE FATIMA GUIMARAES; ROBELIO LEANDRO MARCHAO, CPAC. |
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Título: |
Field-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazi. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma Regional, v. 30, e00532, 2022. |
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Páginas: |
13 p. |
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Idioma: |
Inglês |
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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 Vermelho 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 discretization 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 Vermelho 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 parameter... Mostrar Tudo |
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Palavras-Chave: |
Diferença de inflexão de refletância; Índices Ki e Kr; Variabilidade espacial do solo. |
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Thesagro: |
Argila; Espectrometria; Raio Infravermelho; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03277naa a2200265 a 4500
001 2144045
005 2022-06-14
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, J. F. de
245 $aField-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazi.$h[electronic resource]
260 $c2022
300 $a13 p.
520 $aVisible 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 Vermelho 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 discretization 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.
650 $aArgila
650 $aEspectrometria
650 $aRaio Infravermelho
650 $aSolo
653 $aDiferença de inflexão de refletância
653 $aÍndices Ki e Kr
653 $aVariabilidade espacial do solo
700 1 $aBROSSARD, M.
700 1 $aCORAZZA, E. J.
700 1 $aGUIMARÃES, M. F.
700 1 $aMARCHAO, R. L.
773 $tGeoderma Regional$gv. 30, e00532, 2022.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/11/2014 |
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Data da última atualização: |
18/11/2014 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
LAZZAROTTO, M.; RUIZ, H. Z.; LAZZAROTTO, S. R. da S.; SCHNITZLER, E.; MORAES, M. L. T. de; CAMBUIM, J.; SANTOS, W. dos; AGUIAR, A. V. de. |
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Afiliação: |
MARCELO LAZZAROTTO, CNPF; Henrique Zavattieri Ruiz, UTFPR; Simone Rosa da Silveira Lazzarotto, UEPG; Egon Schnitzler, UEPG; Mario Luiz Teixeira de Moraes, USP; José Cambuim, USP; Wanderley dos Santos, USP; ANANDA VIRGINIA DE AGUIAR, CNPF. |
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Título: |
Use of thermogravimetry analysis to quantify total volatile fraction in pine resin. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC, 2014. |
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Páginas: |
4 p. |
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Descrição Física: |
Disponibilizado online. |
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Idioma: |
Inglês |
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Notas: |
CBRATEC. |
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Conteúdo: |
Pinus species exhibit fast growth and are good producers of wood, cellulose and resin. Brazil is the second largest producer of resin. The People?s Republic of China is the main producer with approximately 90% world?s resin production. Turpentine, volatile fraction, and rosin, solid fraction, are two major fractions or resin. The distillation process continues up to 170° C can be extracted about 95% of the total gum turpentine resin, preserving its constituents. There is little research using thermal analysis to study pine resin properties. This work involved evaporating volatile fraction of resins in an oven at 170 ºC consisted of 20 different samples from Pinus caribaea var. hondurensis and was compared with results obtained in thermal analysis to quantify the same fraction for each one. The volatile fraction in the oven (170 ºC) was from 14.69% to 24.05%. This fraction obtained through thermogravimetric analysis (TGA) was from 13.37% to 23.64%. The results demonstrate that the TGA technique is capable of accurately determining the volatile and non-volatile fractions of the resin and this technical proved to be suitable for further analyses. |
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Palavras-Chave: |
Breu; Espécie exótica; Resin; Terebentina. |
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Thesagro: |
Pinus Caribaea; Resina. |
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Thesaurus NAL: |
rosin; turpentine. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/111820/1/2014-MarceloL-CBATC-UseOfThermogravimetry.pdf
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Marc: |
LEADER 02097nam a2200313 a 4500
001 2000389
005 2014-11-18
008 2014 bl uuuu u00u1 u #d
100 1 $aLAZZAROTTO, M.
245 $aUse of thermogravimetry analysis to quantify total volatile fraction in pine resin.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC$c2014
300 $a4 p.$cDisponibilizado online.
500 $aCBRATEC.
520 $aPinus species exhibit fast growth and are good producers of wood, cellulose and resin. Brazil is the second largest producer of resin. The People?s Republic of China is the main producer with approximately 90% world?s resin production. Turpentine, volatile fraction, and rosin, solid fraction, are two major fractions or resin. The distillation process continues up to 170° C can be extracted about 95% of the total gum turpentine resin, preserving its constituents. There is little research using thermal analysis to study pine resin properties. This work involved evaporating volatile fraction of resins in an oven at 170 ºC consisted of 20 different samples from Pinus caribaea var. hondurensis and was compared with results obtained in thermal analysis to quantify the same fraction for each one. The volatile fraction in the oven (170 ºC) was from 14.69% to 24.05%. This fraction obtained through thermogravimetric analysis (TGA) was from 13.37% to 23.64%. The results demonstrate that the TGA technique is capable of accurately determining the volatile and non-volatile fractions of the resin and this technical proved to be suitable for further analyses.
650 $arosin
650 $aturpentine
650 $aPinus Caribaea
650 $aResina
653 $aBreu
653 $aEspécie exótica
653 $aResin
653 $aTerebentina
700 1 $aRUIZ, H. Z.
700 1 $aLAZZAROTTO, S. R. da S.
700 1 $aSCHNITZLER, E.
700 1 $aMORAES, M. L. T. de
700 1 $aCAMBUIM, J.
700 1 $aSANTOS, W. dos
700 1 $aAGUIAR, A. V. de
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Embrapa Florestas (CNPF) |
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