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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
15/08/2006 |
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Data da última atualização: |
05/10/2007 |
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Autoria: |
MADARI, B. E.; REEVES III, J. B.; MACHADO, P. L. O. A.; GUIMARÃES, C. M.; TORRES, E.; MCCARTY, G. W. |
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Título: |
Mid- and near-infrared spectroscopic assessment of soil compositional parameters and structural indices in two Ferralsols. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Geoderma, Amsterdam, v. 136, n. 1/2, p. 245-259, Dec. 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
Bulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, for Mid-IR and NIR calibrations, respectively. Calibration efforts to determine the values for the set of 700 ASF samples using set of 120 BS from which they were fractionated gave R2 = 0.90 and 0.87 in the Mid-IR and NIR, respectively, when 5% of the ASF were added to the set of 120 BS. Spectral discrimination of sample source was easily and very accurately determined for all data sets examined. MenosBulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, f... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02473naa a2200181 a 4500
001 1469532
005 2007-10-05
008 2006 bl --- 0-- u #d
100 1 $aMADARI, B. E.
245 $aMid- and near-infrared spectroscopic assessment of soil compositional parameters and structural indices in two Ferralsols.
260 $c2006
520 $aBulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, for Mid-IR and NIR calibrations, respectively. Calibration efforts to determine the values for the set of 700 ASF samples using set of 120 BS from which they were fractionated gave R2 = 0.90 and 0.87 in the Mid-IR and NIR, respectively, when 5% of the ASF were added to the set of 120 BS. Spectral discrimination of sample source was easily and very accurately determined for all data sets examined.
700 1 $aREEVES III, J. B.
700 1 $aMACHADO, P. L. O. A.
700 1 $aGUIMARÃES, C. M.
700 1 $aTORRES, E.
700 1 $aMCCARTY, G. W.
773 $tGeoderma, Amsterdam$gv. 136, n. 1/2, p. 245-259, Dec. 2006.
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Registro original: |
Embrapa Soja (CNPSO) |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
12/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
SILVA, M. S. L. da; RIBEIRO, M. R. |
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Afiliação: |
MARIA SONIA LOPES DA SILVA, CPATSA. |
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Título: |
Influencia do cultivo continuo da cana-de-acucar em propriedades morfologicas e fisicas de solos argilosos de tabuleiro no Estado de Alagoas. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, Campinas, v. 16, p. 397-402, 1992. |
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Idioma: |
Português |
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Conteúdo: |
Com o objetivo de avaliar o efeito do cultivo continuo da cana-de-acucar em propriedades de solos de tabuleiro, foram selecionados quatro talhoes da Usina Santa Clotilde, municipio de Rio Largo, AL, sendo um coberto por vegetacao de mata nativa e os demais, cultivados por periodos de 5,15 e 25 anos. Os solos foram caracterizados morfologicamente e nas amostras, coletadas por horizontes, foram determinadas a granulometria, umidade a -1/3 e /15 bar, densidade do solo, estabilidade de agregados, porosidade total, macro- e microporosidade. Os resultados mostraram: (a) que os solos tem uma morfologia similar, exceto para o horizonte superficial, onde a utilizacao agricola promoveo u desenvolvijmento de um horizonte Ap, com transicao abrupta para o horizonte BA subjacente, e (b) que, com relacao as propriedades fisicas, nas condicoes de solo e manejo das areas estudadas, o cultivo continuo da cana-de-acucar nao alterou de forma expressiva as caracteristicas dos solos, podendo ser observadas, apenas, pequenas modificacoes restritas ao horizonte superficial. |
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Palavras-Chave: |
Alagoas; Brasil; Cana-de-açúcar; Morfologia; Morphology; Physic; Plateau; Soils; Solos; Sugar cane; Tabuleiros. |
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Thesagro: |
Cana de Açúcar; Cultivo Continuo; Física; Física do Solo; Solo. |
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Thesaurus NAL: |
soil; sugarcane. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/178460/1/Revista-brasileira-de-ciencia-do-solo-v.16n.3p.397-402.pdf
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Marc: |
LEADER 02010naa a2200349 a 4500
001 1133350
005 2018-06-12
008 1992 bl uuuu u00u1 u #d
100 1 $aSILVA, M. S. L. da
245 $aInfluencia do cultivo continuo da cana-de-acucar em propriedades morfologicas e fisicas de solos argilosos de tabuleiro no Estado de Alagoas.
260 $c1992
520 $aCom o objetivo de avaliar o efeito do cultivo continuo da cana-de-acucar em propriedades de solos de tabuleiro, foram selecionados quatro talhoes da Usina Santa Clotilde, municipio de Rio Largo, AL, sendo um coberto por vegetacao de mata nativa e os demais, cultivados por periodos de 5,15 e 25 anos. Os solos foram caracterizados morfologicamente e nas amostras, coletadas por horizontes, foram determinadas a granulometria, umidade a -1/3 e /15 bar, densidade do solo, estabilidade de agregados, porosidade total, macro- e microporosidade. Os resultados mostraram: (a) que os solos tem uma morfologia similar, exceto para o horizonte superficial, onde a utilizacao agricola promoveo u desenvolvijmento de um horizonte Ap, com transicao abrupta para o horizonte BA subjacente, e (b) que, com relacao as propriedades fisicas, nas condicoes de solo e manejo das areas estudadas, o cultivo continuo da cana-de-acucar nao alterou de forma expressiva as caracteristicas dos solos, podendo ser observadas, apenas, pequenas modificacoes restritas ao horizonte superficial.
650 $asoil
650 $asugarcane
650 $aCana de Açúcar
650 $aCultivo Continuo
650 $aFísica
650 $aFísica do Solo
650 $aSolo
653 $aAlagoas
653 $aBrasil
653 $aCana-de-açúcar
653 $aMorfologia
653 $aMorphology
653 $aPhysic
653 $aPlateau
653 $aSoils
653 $aSolos
653 $aSugar cane
653 $aTabuleiros
700 1 $aRIBEIRO, M. R.
773 $tRevista Brasileira de Ciência do Solo, Campinas$gv. 16, p. 397-402, 1992.
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