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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
11/12/1998 |
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Data da última atualização: |
11/12/1998 |
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Autoria: |
SENA, M. das G. C. de. |
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Afiliação: |
EMBRAPA-CNPMF. |
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Título: |
O papel da mandioca numa agricultura em transformacao: um estudo de caso |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Revista Brasileira de Mandioca, v.11, n.2, p.110-118, 1992 |
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ISSN: |
0101-5632 |
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Idioma: |
Português |
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Conteúdo: |
Em pesquisa realizada com produtores de mandioca do Reconcavo Baiano, buscou-se fazer uma reflexao a respeito da capacidade que tem a producao familiar de se reorganizar e se adaptar as novas condicoes de producao vigentes no agro nacional e como se situa a mandiocultura dentro desse quadro de transformacoes. Embora tendo o seu espaco reduzido, a mandioca permanece nas unidades de exploracao familiar, podendo ser atribuida essa permanencia a uma caracteristica sua que e a alternatividade, ou seja, ela pode ser, concomitantemente, valor de uso e valor de troca. Assim, apesar da redefinicao do seu papel, a mandioca permanece ocupando um lugar importante no ambito dos grupos de producao familiar, quer para consumo direto, quer atraves da realizacao no mercado, participando significativamente da receita dessas unidades. |
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Palavras-Chave: |
Family farming; Organizacao da producao; Organization of production; Social changes; Transformacoes sociais. |
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Thesagro: |
Agricultura Familiar. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01436naa a2200205 a 4500
001 1635332
005 1998-12-11
008 1992 bl uuuu u00u1 u #d
022 $a0101-5632
100 1 $aSENA, M. das G. C. de
245 $aO papel da mandioca numa agricultura em transformacao$bum estudo de caso
260 $c1992
520 $aEm pesquisa realizada com produtores de mandioca do Reconcavo Baiano, buscou-se fazer uma reflexao a respeito da capacidade que tem a producao familiar de se reorganizar e se adaptar as novas condicoes de producao vigentes no agro nacional e como se situa a mandiocultura dentro desse quadro de transformacoes. Embora tendo o seu espaco reduzido, a mandioca permanece nas unidades de exploracao familiar, podendo ser atribuida essa permanencia a uma caracteristica sua que e a alternatividade, ou seja, ela pode ser, concomitantemente, valor de uso e valor de troca. Assim, apesar da redefinicao do seu papel, a mandioca permanece ocupando um lugar importante no ambito dos grupos de producao familiar, quer para consumo direto, quer atraves da realizacao no mercado, participando significativamente da receita dessas unidades.
650 $aAgricultura Familiar
653 $aFamily farming
653 $aOrganizacao da producao
653 $aOrganization of production
653 $aSocial changes
653 $aTransformacoes sociais
773 $tRevista Brasileira de Mandioca$gv.11, n.2, p.110-118, 1992
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Biblioteca |
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Registro |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
23/03/2020 |
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Data da última atualização: |
23/03/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
C - 0 |
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Autoria: |
RIBEIRINHO, V. S.; CARVALHO, C. S.; RAMOS, N. P.; PACKER, A. P.; MILORI, D. M. B. P.; SANTOS, J. de O.; CERRI, C. E. P.; ANDRADE, C. A. de. |
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Afiliação: |
VICTOR SANCHES RIBEIRINHO; CRISTINA SILVA CARVALHO, UEMA; NILZA PATRICIA RAMOS, CNPMA; ANA PAULA CONTADOR PACKER, CNPMA; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA; JULIANA DE OLIVEIRA SANTOS MARCATTO, CNPMA; CARLOS EDUARDO PELLEGRINO CERRI, ESALQ-USP; CRISTIANO ALBERTO DE ANDRADE, CNPMA. |
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Título: |
Organic matter of tropical soil with coffee growth in CO2 enriched atmosphere. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Horticulture International Journal, v. 3, n. 6, p. 283-289, 2019. |
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ISSN: |
2576-4462 |
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DOI: |
https://doi.org/10.15406/hij.2019.03.00143 |
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Idioma: |
Inglês |
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Conteúdo: |
The increase of atmospheric CO2 should result in higher carbon fixation by plants of the C3 photosynthetic cycle, such as coffee. However, not much is known about the relationship between atmospheric CO2 increase, higher carbon fixation through photosynthesis and the potential carbon sequestration in soil. Based on the hypothesis that there will be greater stabilization of carbon in soil due to increase of atmospheric CO2 concentration, the study was carried a field coffee grown area with FACE (Free-Air Carbon dioxide Enrichment) system. The CO2 enrichment treatment maintained the concentration of this gas 200 ?mol mol-1 above the ambient value. The stocks of carbon and nitrogen in soil and some attributes related to the humification of organic matter were evaluated 43 months after the beginning of the experiment. In addition, the decomposition of residues of coffee plants (leaves) and the emission of N2O were also evaluated. The stocks of carbon and nitrogen in soil of at 0-5 cm layer were in average 18% higher (2.6 Mg ha-1 carbon and 0.2 Mg ha-1 nitrogen) in CO2 enrichment treatment. As the decomposition of vegetal remains was not affected by atmospheric CO2 enrichment, the increase of carbon and nitrogen in soil was due to the greater contribution of vegetal material, which resulted in a less humic organic matter. In the equilibrium between carbon soil stabilization and N2O emission, the enrichment of atmospheric CO2 in the coffee crop resulted in negative feedback for global warming due to the increased sequestration potential of carbon by soil. MenosThe increase of atmospheric CO2 should result in higher carbon fixation by plants of the C3 photosynthetic cycle, such as coffee. However, not much is known about the relationship between atmospheric CO2 increase, higher carbon fixation through photosynthesis and the potential carbon sequestration in soil. Based on the hypothesis that there will be greater stabilization of carbon in soil due to increase of atmospheric CO2 concentration, the study was carried a field coffee grown area with FACE (Free-Air Carbon dioxide Enrichment) system. The CO2 enrichment treatment maintained the concentration of this gas 200 ?mol mol-1 above the ambient value. The stocks of carbon and nitrogen in soil and some attributes related to the humification of organic matter were evaluated 43 months after the beginning of the experiment. In addition, the decomposition of residues of coffee plants (leaves) and the emission of N2O were also evaluated. The stocks of carbon and nitrogen in soil of at 0-5 cm layer were in average 18% higher (2.6 Mg ha-1 carbon and 0.2 Mg ha-1 nitrogen) in CO2 enrichment treatment. As the decomposition of vegetal remains was not affected by atmospheric CO2 enrichment, the increase of carbon and nitrogen in soil was due to the greater contribution of vegetal material, which resulted in a less humic organic matter. In the equilibrium between carbon soil stabilization and N2O emission, the enrichment of atmospheric CO2 in the coffee crop resulted in negative feedback for gl... Mostrar Tudo |
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Palavras-Chave: |
Carbon stock; Humification index. |
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Thesagro: |
Café; Matéria Orgânica; Solo Tropical. |
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Thesaurus NAL: |
Coffea arabica var. arabica; Free air carbon dioxide enrichment; Humic substances. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/211977/1/Ramos-NP-organic-matter-2019.pdf
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Marc: |
LEADER 02564naa a2200325 a 4500
001 2121331
005 2020-03-23
008 2019 bl uuuu u00u1 u #d
022 $a2576-4462
024 7 $ahttps://doi.org/10.15406/hij.2019.03.00143$2DOI
100 1 $aRIBEIRINHO, V. S.
245 $aOrganic matter of tropical soil with coffee growth in CO2 enriched atmosphere.$h[electronic resource]
260 $c2019
520 $aThe increase of atmospheric CO2 should result in higher carbon fixation by plants of the C3 photosynthetic cycle, such as coffee. However, not much is known about the relationship between atmospheric CO2 increase, higher carbon fixation through photosynthesis and the potential carbon sequestration in soil. Based on the hypothesis that there will be greater stabilization of carbon in soil due to increase of atmospheric CO2 concentration, the study was carried a field coffee grown area with FACE (Free-Air Carbon dioxide Enrichment) system. The CO2 enrichment treatment maintained the concentration of this gas 200 ?mol mol-1 above the ambient value. The stocks of carbon and nitrogen in soil and some attributes related to the humification of organic matter were evaluated 43 months after the beginning of the experiment. In addition, the decomposition of residues of coffee plants (leaves) and the emission of N2O were also evaluated. The stocks of carbon and nitrogen in soil of at 0-5 cm layer were in average 18% higher (2.6 Mg ha-1 carbon and 0.2 Mg ha-1 nitrogen) in CO2 enrichment treatment. As the decomposition of vegetal remains was not affected by atmospheric CO2 enrichment, the increase of carbon and nitrogen in soil was due to the greater contribution of vegetal material, which resulted in a less humic organic matter. In the equilibrium between carbon soil stabilization and N2O emission, the enrichment of atmospheric CO2 in the coffee crop resulted in negative feedback for global warming due to the increased sequestration potential of carbon by soil.
650 $aCoffea arabica var. arabica
650 $aFree air carbon dioxide enrichment
650 $aHumic substances
650 $aCafé
650 $aMatéria Orgânica
650 $aSolo Tropical
653 $aCarbon stock
653 $aHumification index
700 1 $aCARVALHO, C. S.
700 1 $aRAMOS, N. P.
700 1 $aPACKER, A. P.
700 1 $aMILORI, D. M. B. P.
700 1 $aSANTOS, J. de O.
700 1 $aCERRI, C. E. P.
700 1 $aANDRADE, C. A. de
773 $tHorticulture International Journal$gv. 3, n. 6, p. 283-289, 2019.
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Embrapa Meio Ambiente (CNPMA) |
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