| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
28/06/2000 |
|
Data da última atualização: |
25/02/2019 |
|
Autoria: |
ARAÚJO, A. P.; TEIXEIRA, M. G.; ALMEIDA, D. L. de. |
|
Afiliação: |
ADELSON PAULO ARAÚJO, Universidade Federal Rural do Rio de Janeiro - UFRRJ; MARCELO GRANDI TEIXEIRA, CNPAB; DEJAIR LOPES DE ALMEIDA, CNPAB. |
|
Título: |
Growth and yield of common bean cultivars at two soil phosphorus levels under biological nitrogen fixation. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 4, p. 809-817, abr. 2000. |
|
Idioma: |
Inglês |
|
Notas: |
Título em Português: Crescimento e produção de cultivares de feijoeiro em dois níveis de fósforo no solo sob fixação biológica de nitrogênio. |
|
Conteúdo: |
The genotypic differences on growth and yield of common bean (Phaseolus vulgaris L.) in response to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P (12 and 50 kg ha-1 of P ¾ P1 and P2 respectively), in randomized block design in factorial arrangement. Vegetative biomass was sampled at three ontogenetic stages. The effects of genotype and phosphorus were significant for most traits, but not the genotype phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particularly on root system. At P1, P accumulation persisted after the beginning of pod filling, and P translocation from roots to shoots was lower. The nodule senescence observed after flowering might have reduced N2 fixation during pod filling. The responses of vegetative growth to the higher P supply did not reflect with the same magnitude on yield, which increased only 6% at P2; hence the harvest index was lower at P2. The cultivars with highest yields also presented lower grain P concentrations. A sub-optimal supply of N could have limited the expression of the yield potential of cultivars, reducing the genotypic variability of responses to P levels. |
|
Palavras-Chave: |
Bean. |
|
Thesagro: |
Colheita; Feijão; Phaseolus Vulgaris. |
|
Thesaurus Nal: |
Genotype; Harvest index; Harvesting; Nodulation. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/17278/1/pab98_149.pdf
|
|
Marc: |
LEADER 02133naa a2200253 a 4500
001 1101809
005 2019-02-25
008 2000 bl uuuu u00u1 u #d
100 1 $aARAÚJO, A. P.
245 $aGrowth and yield of common bean cultivars at two soil phosphorus levels under biological nitrogen fixation.
260 $c2000
500 $aTítulo em Português: Crescimento e produção de cultivares de feijoeiro em dois níveis de fósforo no solo sob fixação biológica de nitrogênio.
520 $aThe genotypic differences on growth and yield of common bean (Phaseolus vulgaris L.) in response to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P (12 and 50 kg ha-1 of P ¾ P1 and P2 respectively), in randomized block design in factorial arrangement. Vegetative biomass was sampled at three ontogenetic stages. The effects of genotype and phosphorus were significant for most traits, but not the genotype phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particularly on root system. At P1, P accumulation persisted after the beginning of pod filling, and P translocation from roots to shoots was lower. The nodule senescence observed after flowering might have reduced N2 fixation during pod filling. The responses of vegetative growth to the higher P supply did not reflect with the same magnitude on yield, which increased only 6% at P2; hence the harvest index was lower at P2. The cultivars with highest yields also presented lower grain P concentrations. A sub-optimal supply of N could have limited the expression of the yield potential of cultivars, reducing the genotypic variability of responses to P levels.
650 $aGenotype
650 $aHarvest index
650 $aHarvesting
650 $aNodulation
650 $aColheita
650 $aFeijão
650 $aPhaseolus Vulgaris
653 $aBean
700 1 $aTEIXEIRA, M. G.
700 1 $aALMEIDA, D. L. de
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 35, n. 4, p. 809-817, abr. 2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Solos. |
|
Data corrente: |
10/01/2007 |
|
Data da última atualização: |
20/10/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
Internacional - A |
|
Autoria: |
SIMPSON, A. J.; SONG, G.; SMITH, E.; LAM, B.; NOVOTNY, E. H.; HAYES, M. H. B. |
|
Afiliação: |
ANDRE J. SIMPSON, UNIVERSITY OF TORONTO; GUIXUE SONG, UNIVERSITY OF LIMERICK; EMMA SMITH, UNIVERSITY OF TORONTO; BUUAN LAM, UNIVERSITY OF TORONTO; ETELVINO HENRIQUE NOVOTNY, CNPS; MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK. |
|
Título: |
Unraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Environmental Science & Technology, v. 41, n. 3, p. 876-883, Feb. 2007. |
|
DOI: |
https://doi.org/10.1021/es061576c |
|
Idioma: |
Inglês |
|
Conteúdo: |
Humin is the most recalcitrant and least understood fraction of soil organic matter. By definition, humin is that fraction not extracted by traditional aqueous alkaline soil extractants. Here we show that >_70% of the traditional humin fraction is solubilized when 0.1 M NaOH + 6 M urea and dimethyl sulfoxide (DMSO) + 6% H2SO4 are used in series after conventional extraction. Multidimensional solution-state NMR is applied in this study to gain an understanding of the major constituents present in these "solubilized humin fractions". The spectra indicated strong contributions from five main categories of components, namely. peptides, aliphatic species, carbohydrates, peptidoglycan, and lignin. Diffusion edited spectroscopy indicated that all species are present as macromolecules (or stable aggregate species). Although the distribution of the components is generally similar, peptidoglycan is present at significant levels supporting a higher microbial contribution to humin than to humic and fulvic fractions. The abundance of plant- and microbial-derived materials found does not exclude "humic" materials (e.g., oxidized lignin) or the presence of novel compounds at lower concentrations but suggests that a large proportion of humin is formed from classes of known compounds and parent biopolymers. |
|
Palavras-Chave: |
Organic polymers. |
|
Thesaurus NAL: |
Biopolymers; Carbohydrates; Peptides; Proteins; Soil. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 02103naa a2200265 a 4500
001 1339170
005 2021-10-20
008 2007 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1021/es061576c$2DOI
100 1 $aSIMPSON, A. J.
245 $aUnraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy.$h[electronic resource]
260 $c2007
520 $aHumin is the most recalcitrant and least understood fraction of soil organic matter. By definition, humin is that fraction not extracted by traditional aqueous alkaline soil extractants. Here we show that >_70% of the traditional humin fraction is solubilized when 0.1 M NaOH + 6 M urea and dimethyl sulfoxide (DMSO) + 6% H2SO4 are used in series after conventional extraction. Multidimensional solution-state NMR is applied in this study to gain an understanding of the major constituents present in these "solubilized humin fractions". The spectra indicated strong contributions from five main categories of components, namely. peptides, aliphatic species, carbohydrates, peptidoglycan, and lignin. Diffusion edited spectroscopy indicated that all species are present as macromolecules (or stable aggregate species). Although the distribution of the components is generally similar, peptidoglycan is present at significant levels supporting a higher microbial contribution to humin than to humic and fulvic fractions. The abundance of plant- and microbial-derived materials found does not exclude "humic" materials (e.g., oxidized lignin) or the presence of novel compounds at lower concentrations but suggests that a large proportion of humin is formed from classes of known compounds and parent biopolymers.
650 $aBiopolymers
650 $aCarbohydrates
650 $aPeptides
650 $aProteins
650 $aSoil
653 $aOrganic polymers
700 1 $aSONG, G.
700 1 $aSMITH, E.
700 1 $aLAM, B.
700 1 $aNOVOTNY, E. H.
700 1 $aHAYES, M. H. B.
773 $tEnvironmental Science & Technology$gv. 41, n. 3, p. 876-883, Feb. 2007.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Solos (CNPS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
