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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
12/04/2010 |
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Data da última atualização: |
13/04/2010 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
RIBEIRO, A. M.; OLIVEIRA, M. G. de C. |
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Afiliação: |
ALESSANDRO MOREIRA RIBEIRO, UEG; MARCIA GONZAGA DE CASTRO OLIVEIRA, CNPAF. |
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Título: |
O grande aliado do agricultor familiar. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Boletim Agropecuário 2009. Disponível em: http://www.boletimpecuario.com.br/artigos/showartigo.php?arquivo=artigo1807.txt. Acesso em: 6 nov. 2009. |
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Idioma: |
Português |
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Conteúdo: |
A agricultura familiar é constituída por pequenos e médios agricultores que representam a maioria dos produtores rurais no Brasil. Este segmento detém cerca de 20% das terras e corresponde a 30% da produção global, podendo chegar a 60% da produção em alguns produtos básicos da dieta do brasileiro como feijão, arroz, milho, hortaliças, mandioca e pequenos animais. |
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Thesagro: |
Agricultura familiar. |
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Categoria do assunto: |
B Sociologia Rural |
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Marc: |
LEADER 00886naa a2200145 a 4500
001 1663937
005 2010-04-13
008 2009 bl --- 0-- u #d
100 1 $aRIBEIRO, A. M.
245 $aO grande aliado do agricultor familiar.$h[electronic resource]
260 $c2009
520 $aA agricultura familiar é constituída por pequenos e médios agricultores que representam a maioria dos produtores rurais no Brasil. Este segmento detém cerca de 20% das terras e corresponde a 30% da produção global, podendo chegar a 60% da produção em alguns produtos básicos da dieta do brasileiro como feijão, arroz, milho, hortaliças, mandioca e pequenos animais.
650 $aAgricultura familiar
700 1 $aOLIVEIRA, M. G. de C.
773 $tBoletim Agropecuário 2009. Disponível em: http://www.boletimpecuario.com.br/artigos/showartigo.php?arquivo=artigo1807.txt. Acesso em: 6 nov. 2009.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/02/2019 |
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Data da última atualização: |
19/09/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
PONTE, N. H. T. da; SANTOS, R. I. N.; LOPES FILHO, W. R. L.; CUNHA, R. L.; MAGALHAES, M. M.; PINHEIRO, H. A. |
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Afiliação: |
NARA HELENA TAVARES DA PONTE, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; RODOLFO INACIO NUNES SANTOS, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; WAGNER ROMULO LIMA LOPES FILHO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; ROBERTO LISBOA CUNHA, CPATU; MARCELO MURAD MAGALHAES, CPATU; HUGO ALVES PINHEIRO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA. |
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Título: |
Morphological assessments evidence that higher number of pneumatophores improves tolerance to long-term waterlogging in oil palm (Elaeis guineensis) seedlings. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Flora, v. 250, p. 52-58, Jan. 2019. |
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Idioma: |
Português |
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Conteúdo: |
Oil palm (Elaeis guineensis Jacq.) apparently tolerates long-term waterlogging and numerous pneumatophores are evident morphological adaptation. The number of pneumatophores per plant is, however, quite variable. Thus we hypothesized that a higher number of pneumatophores may attenuate the stress effects on root system growth and induce higher tolerance to long-term waterlogging in oil palm seedlings. To test this hypothesis we compared morphological and physiological traits in well-watered (control) and waterlogged plants with 2?10, 30?40, 60?70, and 90?120 pneumatophores after ca. 77 days of waterlogging. Plant height was similar between control and waterlogged plants with 90?120 pneumatophores, but it was 21% lower in plants with 2?10 pneumatophores than in control. The stem diameter and bulb diameter and biomass were 16, 20 and 42% higher in waterlogged plants than in control, independent of number of pneumatophores. Similar number of leaves and leaflets were observed regardless of watering regime and pneumatophore number, but total leaflet area and leaflet biomass were higher in plants with 90?120 pneumatophores than in other plants. Root system biomass was remarkably decreased in waterlogged plants; however, such decreases were more expressive in plants with 2?10 pneumatophores. Leaf water potential, leaf gas exchange and chlorophyll fluorescence were unaffected by waterlogging. Thus, we conclude that waterlogging causes few changes in seedlings? above-ground morphology but remarkably affects root system development, mainly in those plants with lower number of pneumatophores. Regardless of pneumatophores, the stressed oil palm seedlings were able to adjust their leaf water status and gas exchange to cope properly with the imposed waterlogging. MenosOil palm (Elaeis guineensis Jacq.) apparently tolerates long-term waterlogging and numerous pneumatophores are evident morphological adaptation. The number of pneumatophores per plant is, however, quite variable. Thus we hypothesized that a higher number of pneumatophores may attenuate the stress effects on root system growth and induce higher tolerance to long-term waterlogging in oil palm seedlings. To test this hypothesis we compared morphological and physiological traits in well-watered (control) and waterlogged plants with 2?10, 30?40, 60?70, and 90?120 pneumatophores after ca. 77 days of waterlogging. Plant height was similar between control and waterlogged plants with 90?120 pneumatophores, but it was 21% lower in plants with 2?10 pneumatophores than in control. The stem diameter and bulb diameter and biomass were 16, 20 and 42% higher in waterlogged plants than in control, independent of number of pneumatophores. Similar number of leaves and leaflets were observed regardless of watering regime and pneumatophore number, but total leaflet area and leaflet biomass were higher in plants with 90?120 pneumatophores than in other plants. Root system biomass was remarkably decreased in waterlogged plants; however, such decreases were more expressive in plants with 2?10 pneumatophores. Leaf water potential, leaf gas exchange and chlorophyll fluorescence were unaffected by waterlogging. Thus, we conclude that waterlogging causes few changes in seedlings? above-ground morpholog... Mostrar Tudo |
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Palavras-Chave: |
Palma de óleo. |
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Thesagro: |
Água; Biomassa; Crescimento; Dendê; Elaeis Guineensis; Morfologia Vegetal. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02588naa a2200265 a 4500
001 2106294
005 2022-09-19
008 2019 bl uuuu u00u1 u #d
100 1 $aPONTE, N. H. T. da
245 $aMorphological assessments evidence that higher number of pneumatophores improves tolerance to long-term waterlogging in oil palm (Elaeis guineensis) seedlings.$h[electronic resource]
260 $c2019
520 $aOil palm (Elaeis guineensis Jacq.) apparently tolerates long-term waterlogging and numerous pneumatophores are evident morphological adaptation. The number of pneumatophores per plant is, however, quite variable. Thus we hypothesized that a higher number of pneumatophores may attenuate the stress effects on root system growth and induce higher tolerance to long-term waterlogging in oil palm seedlings. To test this hypothesis we compared morphological and physiological traits in well-watered (control) and waterlogged plants with 2?10, 30?40, 60?70, and 90?120 pneumatophores after ca. 77 days of waterlogging. Plant height was similar between control and waterlogged plants with 90?120 pneumatophores, but it was 21% lower in plants with 2?10 pneumatophores than in control. The stem diameter and bulb diameter and biomass were 16, 20 and 42% higher in waterlogged plants than in control, independent of number of pneumatophores. Similar number of leaves and leaflets were observed regardless of watering regime and pneumatophore number, but total leaflet area and leaflet biomass were higher in plants with 90?120 pneumatophores than in other plants. Root system biomass was remarkably decreased in waterlogged plants; however, such decreases were more expressive in plants with 2?10 pneumatophores. Leaf water potential, leaf gas exchange and chlorophyll fluorescence were unaffected by waterlogging. Thus, we conclude that waterlogging causes few changes in seedlings? above-ground morphology but remarkably affects root system development, mainly in those plants with lower number of pneumatophores. Regardless of pneumatophores, the stressed oil palm seedlings were able to adjust their leaf water status and gas exchange to cope properly with the imposed waterlogging.
650 $aÁgua
650 $aBiomassa
650 $aCrescimento
650 $aDendê
650 $aElaeis Guineensis
650 $aMorfologia Vegetal
653 $aPalma de óleo
700 1 $aSANTOS, R. I. N.
700 1 $aLOPES FILHO, W. R. L.
700 1 $aCUNHA, R. L.
700 1 $aMAGALHAES, M. M.
700 1 $aPINHEIRO, H. A.
773 $tFlora$gv. 250, p. 52-58, Jan. 2019.
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