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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
24/10/2018 |
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Data da última atualização: |
24/10/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TAUBE, P. S.; SILVA, D. S.; VASCONCELOS, A. A.; REBELLATO, L.; MADEUREIRA, L. A. dos S.; HANSEL, F. A. |
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Afiliação: |
Paulo S. Taube, Universidade Federal do Oeste do Pará; Douglas S. Silva, Universidade Federal do Oeste do Pará; Arthur A. Vasconcelos, Universidade Federal do Oeste do Pará; Lilian Rebellato, Universidade Federal do Oeste do Pará; Luiz A. dos Santos Madureira, Universidade Federal de Santa Catarina; FABRICIO AUGUSTO HANSEL, CNPF. |
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Título: |
Exploratory on-line pyrolysis and thermally assisted hydrolysis and methylation for evaluating non-hydrolyzable organic matter in anthropogenic soil from Central Brazilian Amazon. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Brazilian Journal of Analytical Chemistry, v. 5, n. 19, p. 38-53, Jan. 2018. |
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DOI: |
10.30744/brjac.2179-3425.2018.5.19.38-53 |
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Idioma: |
Inglês |
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Conteúdo: |
Amazonian dark earths (ADE) are characterized by high fertility and organic carbon content, the latter being associated with black carbon (BC). BC is recalcitrant in nature due to its aromatic building blocks and it is expected to remain in the non-hydrolyzable fraction after the sequential extraction of soil organic matter (SOM). In this context, the aim of this study was to compare the composition of non-hydrolyzable SOM samples from an ADE and an adjacent soil using pyrolysis - gas chromatography - mass spectrometry and thermally-assisted hydrolysis and methylation with tetramethylammonium hydroxide. We tested two hypotheses: (i) non-hydrolyzable organic matter preserves BC in ADE and adjacent soils; and (ii) pyrolysis products are also produced thermally and are different for ADE and adjacent soils. The results of this study showed that polycyclic aromatic hydrocarbons were the main pyrolysis products for both soils. In addition, the benzene / toluene, naphthalene / methylnaphthalene and benzofuran / methylbenzofuran ratios of the pyrolysis products observed in the case of ADE were around two times higher than the corresponding values for the adjacent soil, except in the surface horizon, which indicates the presence of a higher recalcitrant BC in the ADE. The specific organic matter sources for the ADE and adjacent soil could not be differentiated. |
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Palavras-Chave: |
Black carbon; Py-GC-MS; THM-GC-MS. |
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Thesagro: |
Carbonização; Carvão. |
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Thesaurus Nal: |
Carbonization; Charcoal. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02292naa a2200277 a 4500
001 2098132
005 2018-10-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.30744/brjac.2179-3425.2018.5.19.38-53$2DOI
100 1 $aTAUBE, P. S.
245 $aExploratory on-line pyrolysis and thermally assisted hydrolysis and methylation for evaluating non-hydrolyzable organic matter in anthropogenic soil from Central Brazilian Amazon.$h[electronic resource]
260 $c2018
520 $aAmazonian dark earths (ADE) are characterized by high fertility and organic carbon content, the latter being associated with black carbon (BC). BC is recalcitrant in nature due to its aromatic building blocks and it is expected to remain in the non-hydrolyzable fraction after the sequential extraction of soil organic matter (SOM). In this context, the aim of this study was to compare the composition of non-hydrolyzable SOM samples from an ADE and an adjacent soil using pyrolysis - gas chromatography - mass spectrometry and thermally-assisted hydrolysis and methylation with tetramethylammonium hydroxide. We tested two hypotheses: (i) non-hydrolyzable organic matter preserves BC in ADE and adjacent soils; and (ii) pyrolysis products are also produced thermally and are different for ADE and adjacent soils. The results of this study showed that polycyclic aromatic hydrocarbons were the main pyrolysis products for both soils. In addition, the benzene / toluene, naphthalene / methylnaphthalene and benzofuran / methylbenzofuran ratios of the pyrolysis products observed in the case of ADE were around two times higher than the corresponding values for the adjacent soil, except in the surface horizon, which indicates the presence of a higher recalcitrant BC in the ADE. The specific organic matter sources for the ADE and adjacent soil could not be differentiated.
650 $aCarbonization
650 $aCharcoal
650 $aCarbonização
650 $aCarvão
653 $aBlack carbon
653 $aPy-GC-MS
653 $aTHM-GC-MS
700 1 $aSILVA, D. S.
700 1 $aVASCONCELOS, A. A.
700 1 $aREBELLATO, L.
700 1 $aMADEUREIRA, L. A. dos S.
700 1 $aHANSEL, F. A.
773 $tBrazilian Journal of Analytical Chemistry$gv. 5, n. 19, p. 38-53, Jan. 2018.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
23/04/2013 |
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Data da última atualização: |
15/04/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
CUTRIM JÚNIOR, J. A. A.; CAVALCANTE, A. C. R.; CÂNDIDO, M. J. D.; SILVA, G. L.; OLIVEIRA, L. E. V.; VASCONCELOS, E. C. G.; MESQUITA, T. M. O. |
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Afiliação: |
José Antonio Alves Cutrim Junior, Pós-graduação - Universidade Federal do Ceará (UFC) - Fortaleza; Instituto Federal Maranhão (IFMA); ANA CLARA RODRIGUES CAVALCANTE, CNPC; Magno José Duarte Cândido, UFC - Fortaleza, CE; Gutenberg Lira Silva, Graduação - Universidade Estadual Vale do Acaraú (UVA) - Sobral, CE; Luiza Elvira Vieira Oliveira, Graduação - UVA - Sobral, CE; Elayne Cristina Gadelha Vasconcelos, Graduação - UVA - Sobral, CE; Tony Maiko Oliveira Mesquita, Graduação - UVA - Sobral, CE. |
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Título: |
Biomass flow in Tifton-85 bermudagrass canopy subjected to different management strategies under rotational grazing with dairy goats. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, Viçosa, MG, v. 42, n. 2, p. 77-86, 2013. |
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DOI: |
http://dx.doi.org/10.1590/S1516-35982013000200001 |
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Idioma: |
Inglês |
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Conteúdo: |
Biomass flow characteristics and forage accumulation were evaluated in Bermudagrass (Tifton 85) pasture managed under intermittent stocking with different management strategies. The management levels utilized were conventional (10 cm residual height and unfertilized), light (20 cm residual height and unfertilized), moderate (20 cm residual height with fertilization of 300 kg N/ha.year) and intensive (10 cm residual height with fertilization of 600 kg N/ha.year). A randomized design was used with repeated measurements over time, in two periods of the year, with four replicates. There was significant effect of management × period of the year on the leaf elongation rate (LER). The management levels under fertilization (0.59 and 0.60 cm/tiller.day for the intensive and moderate management, respectively) and the rainy season (0.49 cm/tiller.day) showed the greatest stem elongation rate. Leaf senescence rate (LSR) before and after and total LSR were modified by the management × period of the year interaction. The intensive management, with 0.38 leaves/tiller.day, as well as the dry period, with 0.27 leaves/tiller.day, showed higher leaf appearance rate. The lowest phyllochron was observed in intensive management and dry periods, as well as an interaction with the management of the same periods of the year. There was management × period of year interaction effect on leaf lifespan; the highest value was found under conventional management and dry period. Both production and forage accumulation rates were higher in the intensive and moderate management levels and dry season, and there was interaction of the intensive management system with the seasons. Managing pastures under moderate and intensive rotational stocking, which occurred mainly in the rainy and dry seasons, respectively, maximizes the flow of tissues and consequently production and accumulation of forage. MenosBiomass flow characteristics and forage accumulation were evaluated in Bermudagrass (Tifton 85) pasture managed under intermittent stocking with different management strategies. The management levels utilized were conventional (10 cm residual height and unfertilized), light (20 cm residual height and unfertilized), moderate (20 cm residual height with fertilization of 300 kg N/ha.year) and intensive (10 cm residual height with fertilization of 600 kg N/ha.year). A randomized design was used with repeated measurements over time, in two periods of the year, with four replicates. There was significant effect of management × period of the year on the leaf elongation rate (LER). The management levels under fertilization (0.59 and 0.60 cm/tiller.day for the intensive and moderate management, respectively) and the rainy season (0.49 cm/tiller.day) showed the greatest stem elongation rate. Leaf senescence rate (LSR) before and after and total LSR were modified by the management × period of the year interaction. The intensive management, with 0.38 leaves/tiller.day, as well as the dry period, with 0.27 leaves/tiller.day, showed higher leaf appearance rate. The lowest phyllochron was observed in intensive management and dry periods, as well as an interaction with the management of the same periods of the year. There was management × period of year interaction effect on leaf lifespan; the highest value was found under conventional management and dry period. Both production and forage a... Mostrar Tudo |
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Palavras-Chave: |
Acúmulo de forragem; Adubação nitrogenada; Capim massai; Capim-tifton 85; Cynodon spp; Fluxo de biomassa; Grassland Management; Panicum infestum. |
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Thesagro: |
Cabra leiteira; Caprino; Fertilizante nitrogenado; Morfogênese; Pastejo rotativo. |
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Thesaurus NAL: |
biomass; Goats; Grazing; Morphogenesis; nitrogen fertilizers; Rotational grazing. |
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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/122394/1/CNPC-2013-Biomass-flow.pdf
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Marc: |
LEADER 03238naa a2200433 a 4500
001 1956441
005 2015-04-15
008 2013 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/S1516-35982013000200001$2DOI
100 1 $aCUTRIM JÚNIOR, J. A. A.
245 $aBiomass flow in Tifton-85 bermudagrass canopy subjected to different management strategies under rotational grazing with dairy goats.$h[electronic resource]
260 $c2013
520 $aBiomass flow characteristics and forage accumulation were evaluated in Bermudagrass (Tifton 85) pasture managed under intermittent stocking with different management strategies. The management levels utilized were conventional (10 cm residual height and unfertilized), light (20 cm residual height and unfertilized), moderate (20 cm residual height with fertilization of 300 kg N/ha.year) and intensive (10 cm residual height with fertilization of 600 kg N/ha.year). A randomized design was used with repeated measurements over time, in two periods of the year, with four replicates. There was significant effect of management × period of the year on the leaf elongation rate (LER). The management levels under fertilization (0.59 and 0.60 cm/tiller.day for the intensive and moderate management, respectively) and the rainy season (0.49 cm/tiller.day) showed the greatest stem elongation rate. Leaf senescence rate (LSR) before and after and total LSR were modified by the management × period of the year interaction. The intensive management, with 0.38 leaves/tiller.day, as well as the dry period, with 0.27 leaves/tiller.day, showed higher leaf appearance rate. The lowest phyllochron was observed in intensive management and dry periods, as well as an interaction with the management of the same periods of the year. There was management × period of year interaction effect on leaf lifespan; the highest value was found under conventional management and dry period. Both production and forage accumulation rates were higher in the intensive and moderate management levels and dry season, and there was interaction of the intensive management system with the seasons. Managing pastures under moderate and intensive rotational stocking, which occurred mainly in the rainy and dry seasons, respectively, maximizes the flow of tissues and consequently production and accumulation of forage.
650 $abiomass
650 $aGoats
650 $aGrazing
650 $aMorphogenesis
650 $anitrogen fertilizers
650 $aRotational grazing
650 $aCabra leiteira
650 $aCaprino
650 $aFertilizante nitrogenado
650 $aMorfogênese
650 $aPastejo rotativo
653 $aAcúmulo de forragem
653 $aAdubação nitrogenada
653 $aCapim massai
653 $aCapim-tifton 85
653 $aCynodon spp
653 $aFluxo de biomassa
653 $aGrassland Management
653 $aPanicum infestum
700 1 $aCAVALCANTE, A. C. R.
700 1 $aCÂNDIDO, M. J. D.
700 1 $aSILVA, G. L.
700 1 $aOLIVEIRA, L. E. V.
700 1 $aVASCONCELOS, E. C. G.
700 1 $aMESQUITA, T. M. O.
773 $tRevista Brasileira de Zootecnia, Viçosa, MG$gv. 42, n. 2, p. 77-86, 2013.
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Embrapa Caprinos e Ovinos (CNPC) |
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