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Registro Completo |
Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
08/11/2011 |
Data da última atualização: |
07/12/2011 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
ALLEM, L. N.; HOFFMANN, L. V.; NAGATA, A. K. I.; BARROSO, P. A. V. |
Afiliação: |
LAÍSA NOGUEIRA ALLEM; LUCIA VIEIRA HOFFMANN, CNPA; ALICE KAZUKO INOUE NAGATA, CNPH; PAULO AUGUSTO VIANNA BARROSO, CNPA. |
Título: |
Avaliação da perda de produtividade de plantas de algodão com moisadco comum. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ALGODÃO, 8., 2011, São Paulo. Evolução da cadeia para construção de um setor forte. Anais. Campina Grande, PB: Embrapa Algodão, 2011. |
Páginas: |
p.308-312 |
Idioma: |
Português |
Palavras-Chave: |
MOSAICO COMUM. |
Thesagro: |
Algodão; Produtividade. |
Thesaurus Nal: |
Gossypium. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/45843/1/FIP-023Poster.107.pdf
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Marc: |
LEADER 00668nam a2200193 a 4500 001 1905299 005 2011-12-07 008 2011 bl uuuu u00u1 u #d 100 1 $aALLEM, L. N. 245 $aAvaliação da perda de produtividade de plantas de algodão com moisadco comum. 260 $aIn: CONGRESSO BRASILEIRO DE ALGODÃO, 8., 2011, São Paulo. Evolução da cadeia para construção de um setor forte. Anais. Campina Grande, PB: Embrapa Algodão$c2011 300 $ap.308-312 650 $aGossypium 650 $aAlgodão 650 $aProdutividade 653 $aMOSAICO COMUM 700 1 $aHOFFMANN, L. V. 700 1 $aNAGATA, A. K. I. 700 1 $aBARROSO, P. A. V.
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Embrapa Algodão (CNPA) |
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Registro Completo
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
06/02/2018 |
Data da última atualização: |
30/10/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
GOMES, E. T. M.; BERBARA, R. L. L.; PEREIRA, M. G.; URQUIAGA, S.; TAVARES, O. C. H.; ASSUNÇÃO, S. A.; ZONTA, E.; AMARAL SOBRINHO, N. M. do; GARCPUAM A, C. |
Afiliação: |
ERNANE TARCÍSIO MARTINS GOMES, UFRRJ; RICARDO LUIS LOURO BERBARA, UFRRJ; MARCOS GERVASIO PEREIRA, UFRRJ; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ORLANDO CARLOS HUERTAS TAVARES, UFRRJ; SHIRLEI ALMEIDA ASSUNÇÃO, UFRRJ; EVERALDO ZONTA, UFRRJ; NELSON MOURA BRASIL DO AMARAL SOBRINHO, UFRRJ; ANDRÉS CALDERÍN GARCÍA, UFRRJ. |
Título: |
Effects of farmed managements in sandy soils on composition and stabilization of soil humic substances. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Land Degradation & Development, v. 29, n. 1, p. 68-79, 2018. |
DOI: |
10.1002/ldr.2839 |
Idioma: |
Inglês |
Conteúdo: |
Sandy soils in tropical climates with low organic matter (OM) content result in degradation and fertility loss. It is important to note that humified OM accumulation and stabilization increases soil fertility. This study aimed to characterize humic acids (HAs) in sandy soils on an agroecological farm operating for more than 20years. The structures of the HA of two Planosols under a grazing (G) and crop rotation (R) management system and of an Acrisol under an agroforestry management system (AFS) were characterized using HA extracted from a local Organosol under cassava monoculture (M) as a structural reference. Lower C-HA/C-FA ratio in sandy soil reveals a slightly humified OM and higher E-4/E-6 ratio value in HA confirming lower aromatic structure condensation. The HA in Planosols (R and G) and Acrisols (AFS) are predominantly formed by C-Alq-O,C-N-, CAlq-O-, and CAlq-di-O structures closely related to the soil physical properties and preserved by interaction with the mineral fraction confirmed by O-H, Si-O stretching of kaolinite and hematite bands in FTIR spectroscopy. Management and vegetal carbon type (-20.65 parts per thousand AFS -C-3) or (-15.55 parts per thousand (G) and -17.82 parts per thousand (R) -C-4) had no effect on HA formation. Evolution of structural change in HA modeled by chemometric analyses showed that more recalcitrant structure characteristic in HA can enhance OM preservation in these sandy soils. This study elucidated the OM stabilization mechanisms of sandy soil HA, their relationship with soil properties and models structural changes for humified OM recovery and preservation, which contribute to increased fertility and agricultural production. MenosSandy soils in tropical climates with low organic matter (OM) content result in degradation and fertility loss. It is important to note that humified OM accumulation and stabilization increases soil fertility. This study aimed to characterize humic acids (HAs) in sandy soils on an agroecological farm operating for more than 20years. The structures of the HA of two Planosols under a grazing (G) and crop rotation (R) management system and of an Acrisol under an agroforestry management system (AFS) were characterized using HA extracted from a local Organosol under cassava monoculture (M) as a structural reference. Lower C-HA/C-FA ratio in sandy soil reveals a slightly humified OM and higher E-4/E-6 ratio value in HA confirming lower aromatic structure condensation. The HA in Planosols (R and G) and Acrisols (AFS) are predominantly formed by C-Alq-O,C-N-, CAlq-O-, and CAlq-di-O structures closely related to the soil physical properties and preserved by interaction with the mineral fraction confirmed by O-H, Si-O stretching of kaolinite and hematite bands in FTIR spectroscopy. Management and vegetal carbon type (-20.65 parts per thousand AFS -C-3) or (-15.55 parts per thousand (G) and -17.82 parts per thousand (R) -C-4) had no effect on HA formation. Evolution of structural change in HA modeled by chemometric analyses showed that more recalcitrant structure characteristic in HA can enhance OM preservation in these sandy soils. This study elucidated the OM stabilization mechanisms... Mostrar Tudo |
Palavras-Chave: |
Organic agriculture; Sandy soil; Soil preservation. |
Thesaurus NAL: |
humic acids; soil organic matter. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02571naa a2200289 a 4500 001 2087206 005 2018-10-30 008 2018 bl uuuu u00u1 u #d 024 7 $a10.1002/ldr.2839$2DOI 100 1 $aGOMES, E. T. M. 245 $aEffects of farmed managements in sandy soils on composition and stabilization of soil humic substances.$h[electronic resource] 260 $c2018 520 $aSandy soils in tropical climates with low organic matter (OM) content result in degradation and fertility loss. It is important to note that humified OM accumulation and stabilization increases soil fertility. This study aimed to characterize humic acids (HAs) in sandy soils on an agroecological farm operating for more than 20years. The structures of the HA of two Planosols under a grazing (G) and crop rotation (R) management system and of an Acrisol under an agroforestry management system (AFS) were characterized using HA extracted from a local Organosol under cassava monoculture (M) as a structural reference. Lower C-HA/C-FA ratio in sandy soil reveals a slightly humified OM and higher E-4/E-6 ratio value in HA confirming lower aromatic structure condensation. The HA in Planosols (R and G) and Acrisols (AFS) are predominantly formed by C-Alq-O,C-N-, CAlq-O-, and CAlq-di-O structures closely related to the soil physical properties and preserved by interaction with the mineral fraction confirmed by O-H, Si-O stretching of kaolinite and hematite bands in FTIR spectroscopy. Management and vegetal carbon type (-20.65 parts per thousand AFS -C-3) or (-15.55 parts per thousand (G) and -17.82 parts per thousand (R) -C-4) had no effect on HA formation. Evolution of structural change in HA modeled by chemometric analyses showed that more recalcitrant structure characteristic in HA can enhance OM preservation in these sandy soils. This study elucidated the OM stabilization mechanisms of sandy soil HA, their relationship with soil properties and models structural changes for humified OM recovery and preservation, which contribute to increased fertility and agricultural production. 650 $ahumic acids 650 $asoil organic matter 653 $aOrganic agriculture 653 $aSandy soil 653 $aSoil preservation 700 1 $aBERBARA, R. L. L. 700 1 $aPEREIRA, M. G. 700 1 $aURQUIAGA, S. 700 1 $aTAVARES, O. C. H. 700 1 $aASSUNÇÃO, S. A. 700 1 $aZONTA, E. 700 1 $aAMARAL SOBRINHO, N. M. do 700 1 $aGARCPUAM A, C. 773 $tLand Degradation & Development$gv. 29, n. 1, p. 68-79, 2018.
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