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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
10/11/2021 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VALLADARES, G. S.; PEREIRA, M. G.; BENITES, V. de M.; ANJOS, L. H. C. dos; EBELING, A. G.; GUARESCHI, R. F. |
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Afiliação: |
GUSTAVO SOUZA VALLADARES, UFPI; MARCOS GERVASIO PEREIRA, UFRRJ; VINICIUS DE MELO BENITES, CNPS; LÚCIA HELENA CUNHA DOS ANJOS, UFRRJ; ADIERSON GILVANI EBELING, INCRA; RONI FERNANDES GUARESCHI, UFRRJ. |
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Título: |
Carbon and nitrogen stocks and humic fractions in Brazilian organosols. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, v. 40, e0151317, 2016. |
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DOI: |
https://doi.org/10.1590/18069657rbcs20151317 |
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Idioma: |
Inglês |
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Conteúdo: |
Despite limited geographic expression of Organosols in Brazil, their high carbon storage capacity and natural environmental vulnerability justifies further studies on C and N stocks in these soils and their relationship to the nature of organic matter. Evaluation of physical and chemical properties of organic soils and their ability to store C is important so as to develop sustainable management practices for their preservation. The objectives of the study were to measure the total organic carbon stock (OCst), total nitrogen stock (Nst), and humic fractions in Organosols from different environments and regions of Brazil, and to correlate the data with soil chemical (pH, P, K, Ca2+, Mg2+, Al3+, H+Al, CEC, V) and physical properties (soil bulk density, Bd; organic matter density, OMd; total pore space, TPS; minimum residue, MinR; and proportion of mineral matter, MM), and degree of organic matter decomposition (rubbed fiber content; pyrophosphate index, PyI; and von Post index). For that purpose, 18 Organosol profiles, in a total of 49 horizons, were sampled under different land usage and plant coverage conditions. The profiles were located in the following Brazilian states - Alagoas, Bahia, Distrito Federal, Espírito Santo, Mato Grosso do Sul, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, and São Paulo. The OCst and Nst varied significantly among horizons and profiles. The Organosols exhibited, on average, 203.59 Mg ha-1 OCst and 8.30 Mg ha-1 Nst, and the highest values were found in profiles with pasture usage. The content of the humic fraction (humin, HUM; fulvic acid, FAF; and humic acid, HAF) and C storage varied in the soil horizons and profiles according to the degree of decomposition and other factors of soil formation. The OCst, Nst, OMd and the C stocks in the humic fractions were positively correlated. The values of acidity were lower in the soils with higher contents of mineral material, and low pH values were related to a high C/N ratio. The OCst and Nst were correlated with different soil properties, the most important being the degree of soil organic matter decomposition, which was inversely correlated. MenosDespite limited geographic expression of Organosols in Brazil, their high carbon storage capacity and natural environmental vulnerability justifies further studies on C and N stocks in these soils and their relationship to the nature of organic matter. Evaluation of physical and chemical properties of organic soils and their ability to store C is important so as to develop sustainable management practices for their preservation. The objectives of the study were to measure the total organic carbon stock (OCst), total nitrogen stock (Nst), and humic fractions in Organosols from different environments and regions of Brazil, and to correlate the data with soil chemical (pH, P, K, Ca2+, Mg2+, Al3+, H+Al, CEC, V) and physical properties (soil bulk density, Bd; organic matter density, OMd; total pore space, TPS; minimum residue, MinR; and proportion of mineral matter, MM), and degree of organic matter decomposition (rubbed fiber content; pyrophosphate index, PyI; and von Post index). For that purpose, 18 Organosol profiles, in a total of 49 horizons, were sampled under different land usage and plant coverage conditions. The profiles were located in the following Brazilian states - Alagoas, Bahia, Distrito Federal, Espírito Santo, Mato Grosso do Sul, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, and São Paulo. The OCst and Nst varied significantly among horizons and profiles. The Organosols exhibited, on average, 203.59 Mg ha-1 OCst and 8.30 Mg ha-1 Nst, a... Mostrar Tudo |
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Palavras-Chave: |
Histic horizon; Physical and chemical properties. |
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Thesagro: |
Matéria Orgânica; Solo. |
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Thesaurus Nal: |
Humic substances; Soil organic matter. |
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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/item/227591/1/Carbon-and-nitrogen-stocks-and-humic-fractions-in-Brazilian-organosols-2016.pdf
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Marc: |
LEADER 03003naa a2200265 a 4500
001 2135980
005 2021-11-10
008 2016 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/18069657rbcs20151317$2DOI
100 1 $aVALLADARES, G. S.
245 $aCarbon and nitrogen stocks and humic fractions in Brazilian organosols.$h[electronic resource]
260 $c2016
520 $aDespite limited geographic expression of Organosols in Brazil, their high carbon storage capacity and natural environmental vulnerability justifies further studies on C and N stocks in these soils and their relationship to the nature of organic matter. Evaluation of physical and chemical properties of organic soils and their ability to store C is important so as to develop sustainable management practices for their preservation. The objectives of the study were to measure the total organic carbon stock (OCst), total nitrogen stock (Nst), and humic fractions in Organosols from different environments and regions of Brazil, and to correlate the data with soil chemical (pH, P, K, Ca2+, Mg2+, Al3+, H+Al, CEC, V) and physical properties (soil bulk density, Bd; organic matter density, OMd; total pore space, TPS; minimum residue, MinR; and proportion of mineral matter, MM), and degree of organic matter decomposition (rubbed fiber content; pyrophosphate index, PyI; and von Post index). For that purpose, 18 Organosol profiles, in a total of 49 horizons, were sampled under different land usage and plant coverage conditions. The profiles were located in the following Brazilian states - Alagoas, Bahia, Distrito Federal, Espírito Santo, Mato Grosso do Sul, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, and São Paulo. The OCst and Nst varied significantly among horizons and profiles. The Organosols exhibited, on average, 203.59 Mg ha-1 OCst and 8.30 Mg ha-1 Nst, and the highest values were found in profiles with pasture usage. The content of the humic fraction (humin, HUM; fulvic acid, FAF; and humic acid, HAF) and C storage varied in the soil horizons and profiles according to the degree of decomposition and other factors of soil formation. The OCst, Nst, OMd and the C stocks in the humic fractions were positively correlated. The values of acidity were lower in the soils with higher contents of mineral material, and low pH values were related to a high C/N ratio. The OCst and Nst were correlated with different soil properties, the most important being the degree of soil organic matter decomposition, which was inversely correlated.
650 $aHumic substances
650 $aSoil organic matter
650 $aMatéria Orgânica
650 $aSolo
653 $aHistic horizon
653 $aPhysical and chemical properties
700 1 $aPEREIRA, M. G.
700 1 $aBENITES, V. de M.
700 1 $aANJOS, L. H. C. dos
700 1 $aEBELING, A. G.
700 1 $aGUARESCHI, R. F.
773 $tRevista Brasileira de Ciência do Solo$gv. 40, e0151317, 2016.
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Registro original: |
Embrapa Solos (CNPS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
15/08/2019 |
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Data da última atualização: |
08/11/2019 |
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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: |
SANTANA, F. B. de; GIUSEPPE, L. O. de; SOUZA, A. M. de; POPPI, R. J. |
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Afiliação: |
FELIPE B. DE SANTANA, UNICAMP; LARISSA O. DE GIUSEPPE, UNICAMP; ANDRE MARCELO DE SOUZA, CNPS; RONEI J. POPPI, UNICAMP. |
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Título: |
Removing the moisture effect in soil organic matter determination using NIR spectroscopy and PLSR with external parameter orthogonalization. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Microchemical Journal, v. 145, p. 1094-1101, Mar. 2019. |
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DOI: |
10.1016/j.microc.2018.12.027 |
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Idioma: |
Inglês |
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Conteúdo: |
Near-infrared spectroscopy (NIR) is one of the most promising alternative technique for soil analysis in routine laboratories, which can provide faster and cheaper determinations of some soil parameters, including soil organic matter (SOM) content. However, NIR spectroscopy is quite sensitive to external environmental conditions, such as soil moisture, drastically reducing the accuracy of the methodology. In this study we used the external parameter orthogonalization (EPO) to minimize the moisture effect on soil spectra, making possible to apply the model developed with dry samples in moist ones. It was used 163 soil samples collected from several regions of Brazil, of these 103 dry samples were used to build the calibration model and the remaining 60 samples were moisturized at five different levels (5-35% w/w) to build the EPO model and to validate the methodology. The results obtained by EPO model (1.85 g/dm3, 0.86 and 2.02 for RMSEP, R2 val, and RPDval, respectively) showed that the method was able to remove the effect of moisture in the NIR spectra, with accuracy values statistically equivalent for dry and moist soil samples. |
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Thesagro: |
Espectrometria; Matéria Orgânica; Raio Infravermelho; Solo. |
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Thesaurus NAL: |
Near-infrared spectroscopy; Organic matter; Soil. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01957naa a2200253 a 4500
001 2111374
005 2019-11-08
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1016/j.microc.2018.12.027$2DOI
100 1 $aSANTANA, F. B. de
245 $aRemoving the moisture effect in soil organic matter determination using NIR spectroscopy and PLSR with external parameter orthogonalization.$h[electronic resource]
260 $c2019
520 $aNear-infrared spectroscopy (NIR) is one of the most promising alternative technique for soil analysis in routine laboratories, which can provide faster and cheaper determinations of some soil parameters, including soil organic matter (SOM) content. However, NIR spectroscopy is quite sensitive to external environmental conditions, such as soil moisture, drastically reducing the accuracy of the methodology. In this study we used the external parameter orthogonalization (EPO) to minimize the moisture effect on soil spectra, making possible to apply the model developed with dry samples in moist ones. It was used 163 soil samples collected from several regions of Brazil, of these 103 dry samples were used to build the calibration model and the remaining 60 samples were moisturized at five different levels (5-35% w/w) to build the EPO model and to validate the methodology. The results obtained by EPO model (1.85 g/dm3, 0.86 and 2.02 for RMSEP, R2 val, and RPDval, respectively) showed that the method was able to remove the effect of moisture in the NIR spectra, with accuracy values statistically equivalent for dry and moist soil samples.
650 $aNear-infrared spectroscopy
650 $aOrganic matter
650 $aSoil
650 $aEspectrometria
650 $aMatéria Orgânica
650 $aRaio Infravermelho
650 $aSolo
700 1 $aGIUSEPPE, L. O. de
700 1 $aSOUZA, A. M. de
700 1 $aPOPPI, R. J.
773 $tMicrochemical Journal$gv. 145, p. 1094-1101, Mar. 2019.
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