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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
30/01/2006 |
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Data da última atualização: |
14/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VOLLAND-TUDURI, N.; BRUAND, A.; BROSSARD, M.; BALBINO, L. C.; OLIVEIRA, M. I. L. de; MARTINS, E. de S. |
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Afiliação: |
NATHALIE VOLLAND-TUDURI; ARY BRUAND; MICHEL BROSSARD; LUIZ CARLOS BALBINO, CNPAF; MARIA INES LOPES DE OLIVEIRA; EDER DE SOUZA MARTINS. |
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Título: |
Mass proportion of microaggregates and bulk density in a Brazilian clayey Oxisol. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, v. 69, n. 5, p.1559-1564, Sept./Oct. 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
The physical properties of Brazilian Oxisols are closely related to the development of their microstructure, which typically consists of stable microaggregates >1 mm. There is no model available to predict changes in microstructure in Oxisols. The objective of this work was to relate the proportion of microaggregates to the bulk density (Db) in the soil studied. Five sites of a typic Haplustox under native forest vegetation (two sites) and pasture (three sites) in Rio de Janeiro were sampled. Soil bulk density, sand, silt, and clay content and aggregate-size distribution were measured from the surface to 1.6 m deep in increments of 0.1 m. Thin sections were prepared from undisturbed samples collected in duplicate from 0- to 0.1-, 0.3- to 0.4-, 0.8- to 0.9-, and 1.5- to 1.6-m depths, and backscattered electron scanning images (BESI) were generated. Clay content ranged from 672 to 798 g kg-1 and bulk density between 0.87 and 1.18 g cm-3 among the 80 samples studied. Bulk density was poorly correlated with clay content (R2=0.358) and at any depth was not significantly smaller under native forest vegetation than under pasture. Visual assessment of BESI revealed that soil material corresponded to either microaggregates (<0.1 mm) in loose arrangement or to much larger aggregates. Quantification of BESI from the deepest sampling depth of all soils showed that 96.2 and 95.7% of microaggregates were <0.8 mm with 73.2 and 95.7% between 0.1 and 0.5 mm under native forest vegetation and pasture, respectively. The mass proportion of microaggregates can be estimated using the <0.84-mm soil material that is obtained by dry sieving ( Phi <0.84). Finally, our results showed that Phi <0.84 varied with Db. Linear regression coefficients were calculated for the relationship between Phi <0.84 and the reciprocal of bulk density (1/Db) [ Phi <0.84=1.97 (1/Db) - 1.52, R2=0.82], assuming no interaction between microaggregates and macro aggregates, the porosity of these two structural types was estimated as 0.71 and 0.51, respectively. MenosThe physical properties of Brazilian Oxisols are closely related to the development of their microstructure, which typically consists of stable microaggregates >1 mm. There is no model available to predict changes in microstructure in Oxisols. The objective of this work was to relate the proportion of microaggregates to the bulk density (Db) in the soil studied. Five sites of a typic Haplustox under native forest vegetation (two sites) and pasture (three sites) in Rio de Janeiro were sampled. Soil bulk density, sand, silt, and clay content and aggregate-size distribution were measured from the surface to 1.6 m deep in increments of 0.1 m. Thin sections were prepared from undisturbed samples collected in duplicate from 0- to 0.1-, 0.3- to 0.4-, 0.8- to 0.9-, and 1.5- to 1.6-m depths, and backscattered electron scanning images (BESI) were generated. Clay content ranged from 672 to 798 g kg-1 and bulk density between 0.87 and 1.18 g cm-3 among the 80 samples studied. Bulk density was poorly correlated with clay content (R2=0.358) and at any depth was not significantly smaller under native forest vegetation than under pasture. Visual assessment of BESI revealed that soil material corresponded to either microaggregates (<0.1 mm) in loose arrangement or to much larger aggregates. Quantification of BESI from the deepest sampling depth of all soils showed that 96.2 and 95.7% of microaggregates were <0.8 mm with 73.2 and 95.7% between 0.1 and 0.5 mm under native forest vegetation and... Mostrar Tudo |
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Thesagro: |
Cerrado; Solo. |
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Thesaurus Nal: |
bulk density; clay fraction; forest soils; grassland soils; image analysis; microaggregates; Oxisols; particle size distribution; sand fraction; silt fraction; soil density; soil physical properties; soil structure; soil types. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03119naa a2200373 a 4500
001 1213861
005 2022-05-14
008 2005 bl uuuu u00u1 u #d
100 1 $aVOLLAND-TUDURI, N.
245 $aMass proportion of microaggregates and bulk density in a Brazilian clayey Oxisol.$h[electronic resource]
260 $c2005
520 $aThe physical properties of Brazilian Oxisols are closely related to the development of their microstructure, which typically consists of stable microaggregates >1 mm. There is no model available to predict changes in microstructure in Oxisols. The objective of this work was to relate the proportion of microaggregates to the bulk density (Db) in the soil studied. Five sites of a typic Haplustox under native forest vegetation (two sites) and pasture (three sites) in Rio de Janeiro were sampled. Soil bulk density, sand, silt, and clay content and aggregate-size distribution were measured from the surface to 1.6 m deep in increments of 0.1 m. Thin sections were prepared from undisturbed samples collected in duplicate from 0- to 0.1-, 0.3- to 0.4-, 0.8- to 0.9-, and 1.5- to 1.6-m depths, and backscattered electron scanning images (BESI) were generated. Clay content ranged from 672 to 798 g kg-1 and bulk density between 0.87 and 1.18 g cm-3 among the 80 samples studied. Bulk density was poorly correlated with clay content (R2=0.358) and at any depth was not significantly smaller under native forest vegetation than under pasture. Visual assessment of BESI revealed that soil material corresponded to either microaggregates (<0.1 mm) in loose arrangement or to much larger aggregates. Quantification of BESI from the deepest sampling depth of all soils showed that 96.2 and 95.7% of microaggregates were <0.8 mm with 73.2 and 95.7% between 0.1 and 0.5 mm under native forest vegetation and pasture, respectively. The mass proportion of microaggregates can be estimated using the <0.84-mm soil material that is obtained by dry sieving ( Phi <0.84). Finally, our results showed that Phi <0.84 varied with Db. Linear regression coefficients were calculated for the relationship between Phi <0.84 and the reciprocal of bulk density (1/Db) [ Phi <0.84=1.97 (1/Db) - 1.52, R2=0.82], assuming no interaction between microaggregates and macro aggregates, the porosity of these two structural types was estimated as 0.71 and 0.51, respectively.
650 $abulk density
650 $aclay fraction
650 $aforest soils
650 $agrassland soils
650 $aimage analysis
650 $amicroaggregates
650 $aOxisols
650 $aparticle size distribution
650 $asand fraction
650 $asilt fraction
650 $asoil density
650 $asoil physical properties
650 $asoil structure
650 $asoil types
650 $aCerrado
650 $aSolo
700 1 $aBRUAND, A.
700 1 $aBROSSARD, M.
700 1 $aBALBINO, L. C.
700 1 $aOLIVEIRA, M. I. L. de
700 1 $aMARTINS, E. de S.
773 $tSoil Science Society of America Journal$gv. 69, n. 5, p.1559-1564, Sept./Oct. 2005.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
06/03/2012 |
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Data da última atualização: |
25/06/2012 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
NEVES, G. de O.; OLIVEIRA, L. A. de; SANTOS, A. de O.; SANTANA, F. A.; VIANA, E. de S.; AMORIM, E. P. |
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Afiliação: |
GREZIANE DE OLIVEIRA NEVES, Colégio Estadual Dr. Lauro Passos; LUCIANA ALVES DE OLIVEIRA, CNPMF; ALLANA DE OLIVEIRA SANTOS, FAMAM; FERNANDA ALVES SANTANA, UFRB; ELISETH DE SOUZA VIANA, CNPMF; EDSON PERITO AMORIM, CNPMF. |
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Título: |
Teores de compostos bioativos e proteína em variedades de banana. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DE CIÊNCIA, TECNOLOGIA, INOVAÇÃO E CULTURA NO RECÔNCAVO DA BAHIA - RECITEC RECÔNCAVO. 1., 2011, Cruz das Almas. Anais... Cruz das Almas: Universidade Federal do Recôncavo da Bahia, 2011. 1 CD-ROM. |
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Páginas: |
2 p. |
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Idioma: |
Português |
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Notas: |
Em paralelo aconteceram também os seguintes eventos: V Seminário de Pesquisa do Recôncavo da Bahia; V Seminário Estudantil de Pesquisa da UFRB; V Seminário da Pós-Graduação da UFRB; II Seminário Regional de Pesquisa da EBDA; 5ª Jornada Científica da Embrapa Mandioca e Fruticultura; VIII Seminário Estudantil de Pesquisa e Extensão da FAMAM; Semana de Ciência, Tecnologia e Inovação no Agronegócio; Fórum de Gestores de Iniciação Científica e Tecnológica da Bahia; II Simpósio Baiano de Defesa Agropecuária; I Semana de Educação Tutorial da UFRB. |
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Conteúdo: |
A banana (Musa spp.) é originária do continente asiático, e atualmente vem sendo explorada na maioria dos países tropicais, ocupando o segundo lugar em volume de frutas produzidas e consumidas no Brasil. Nos últimos anos, a população adquiriu a visão de que os alimentos, além de nutrir, podem também oferecer compostos ou elementos biologicamente ativos que proporcionam benefícios adicionais à saúde. |
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Palavras-Chave: |
Carotenoides; Carotenoides totais. |
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Thesagro: |
Banana; Vitamina C. |
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Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/61416/1/TEORES-DE-COMPOSTOS-BIOATIVOS-E-PROTEINA-EM-VARIEDADES-DE-BA.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55184/1/Teores-compostos-Luciana-oliveira-100-11.pdf
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Marc: |
LEADER 01799nam a2200241 a 4500
001 1927081
005 2012-06-25
008 2011 bl uuuu u00u1 u #d
100 1 $aNEVES, G. de O.
245 $aTeores de compostos bioativos e proteína em variedades de banana.
260 $aIn: REUNIÃO ANUAL DE CIÊNCIA, TECNOLOGIA, INOVAÇÃO E CULTURA NO RECÔNCAVO DA BAHIA - RECITEC RECÔNCAVO. 1., 2011, Cruz das Almas. Anais... Cruz das Almas: Universidade Federal do Recôncavo da Bahia, 2011. 1 CD-ROM.$c2011
300 $a2 p.
500 $aEm paralelo aconteceram também os seguintes eventos: V Seminário de Pesquisa do Recôncavo da Bahia; V Seminário Estudantil de Pesquisa da UFRB; V Seminário da Pós-Graduação da UFRB; II Seminário Regional de Pesquisa da EBDA; 5ª Jornada Científica da Embrapa Mandioca e Fruticultura; VIII Seminário Estudantil de Pesquisa e Extensão da FAMAM; Semana de Ciência, Tecnologia e Inovação no Agronegócio; Fórum de Gestores de Iniciação Científica e Tecnológica da Bahia; II Simpósio Baiano de Defesa Agropecuária; I Semana de Educação Tutorial da UFRB.
520 $aA banana (Musa spp.) é originária do continente asiático, e atualmente vem sendo explorada na maioria dos países tropicais, ocupando o segundo lugar em volume de frutas produzidas e consumidas no Brasil. Nos últimos anos, a população adquiriu a visão de que os alimentos, além de nutrir, podem também oferecer compostos ou elementos biologicamente ativos que proporcionam benefícios adicionais à saúde.
650 $aBanana
650 $aVitamina C
653 $aCarotenoides
653 $aCarotenoides totais
700 1 $aOLIVEIRA, L. A. de
700 1 $aSANTOS, A. de O.
700 1 $aSANTANA, F. A.
700 1 $aVIANA, E. de S.
700 1 $aAMORIM, E. P.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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