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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
09/02/2001 |
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Data da última atualização: |
09/02/2001 |
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Autoria: |
GOMES, J. C. C.; ROSENSTEIN, S. |
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Título: |
A geracao de conhecimento na transicao agroambiental: em defesa da pluralidade epistemologica e metodologica na pratica cientifica. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Cadernos de Ciencia e Tecnologia, Brasilia, v.17, n.3, p.29-57, set./dez. 2000. |
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Idioma: |
Português |
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Conteúdo: |
Este texto discute o papel da ciencia e da tecnologia na sociedade moderna, fundamentando a necessidade de uma abertura epistemologica e metodologica na producao do conhecimento agrario. Parte do pressuposto de que existe uma crise na ciencia e tecnologia, geradora de diferentes discursos, surgidos nas academias ou em movimentos sociais, e que tentam articular formas de resistencia a crise e suas manifestacoes. De um lado esta a visao mais em sintonia com o legado positivista, ou "concepcao herdada" da ciencia; de outro, uma postura que ve a producao do conhecimento afetada pelos valores e interesses de seus implicados (como uma disputa de poder). Neste contexto surge o apelo pelo desenvolvimento sustentavel,conceito nao isento de ambiguidades. As cosmovisoes terao reflexo nas propostas para dar suporte a formatos tecnologicos, variando desde aqueles sintonizados com o otimismo tecnologico, que propoem a segunda revolucao verde, ou uma ecologizacao mais moderna para atender as condicoes do mercado, ate aqueles que querem uma reorganizacao capitalista que inclua a questao ambiental e social aparecem fundidas como na agroecologia. |
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Palavras-Chave: |
Ciencia; Conhecimento agrario; Epistemologia; Epistemological; Scientific practices; Transicao agroambiental. |
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Thesagro: |
Tecnologia. |
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Thesaurus Nal: |
environment; technology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01895naa a2200241 a 4500
001 1103356
005 2001-02-09
008 2000 bl uuuu u00u1 u #d
100 1 $aGOMES, J. C. C.
245 $aA geracao de conhecimento na transicao agroambiental$bem defesa da pluralidade epistemologica e metodologica na pratica cientifica.
260 $c2000
520 $aEste texto discute o papel da ciencia e da tecnologia na sociedade moderna, fundamentando a necessidade de uma abertura epistemologica e metodologica na producao do conhecimento agrario. Parte do pressuposto de que existe uma crise na ciencia e tecnologia, geradora de diferentes discursos, surgidos nas academias ou em movimentos sociais, e que tentam articular formas de resistencia a crise e suas manifestacoes. De um lado esta a visao mais em sintonia com o legado positivista, ou "concepcao herdada" da ciencia; de outro, uma postura que ve a producao do conhecimento afetada pelos valores e interesses de seus implicados (como uma disputa de poder). Neste contexto surge o apelo pelo desenvolvimento sustentavel,conceito nao isento de ambiguidades. As cosmovisoes terao reflexo nas propostas para dar suporte a formatos tecnologicos, variando desde aqueles sintonizados com o otimismo tecnologico, que propoem a segunda revolucao verde, ou uma ecologizacao mais moderna para atender as condicoes do mercado, ate aqueles que querem uma reorganizacao capitalista que inclua a questao ambiental e social aparecem fundidas como na agroecologia.
650 $aenvironment
650 $atechnology
650 $aTecnologia
653 $aCiencia
653 $aConhecimento agrario
653 $aEpistemologia
653 $aEpistemological
653 $aScientific practices
653 $aTransicao agroambiental
700 1 $aROSENSTEIN, S.
773 $tCadernos de Ciencia e Tecnologia, Brasilia$gv.17, n.3, p.29-57, set./dez. 2000.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/11/2023 |
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Data da última atualização: |
13/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SANTOS, A. D.; SOUSA, M. B. e; ALVES, A. A. C.; OLIVEIRA, E. J. de. |
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Afiliação: |
ALEXANDRA DAMASCENO SANTOS, UNIVERSIDADE FEDERAL DO RECÔNCAVO DA BAHIA; MASSAINE BANDEIRA E SOUSA; ALFREDO AUGUSTO CUNHA ALVES, CNPMF; EDER JORGE DE OLIVEIRA, CNPMF. |
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Título: |
Environmental factors influence the production of flowers and fruits of cassava. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Scientia Horticulturae, v. 323, 112498, 2024. |
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Páginas: |
14 p. |
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Descrição Física: |
il. |
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Idioma: |
Inglês |
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Conteúdo: |
Cassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that temperature and accumulated degree days are environmental factors correlated with increased flowering in cassava. Moreover, the dispersion of the genotypes in the two principal component analysis showed differences across the six planting seasons, indicating the environmental influence on the expression of flowering in this species. These findings can help breeders make reliable decisions when setting up crossing fields to accelerate the acquisition of improved progenies. MenosCassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that tempe... Mostrar Tudo |
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Thesagro: |
Mandioca. |
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Thesaurus NAL: |
Cassava; Flowers; Fruits. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02564naa a2200217 a 4500
001 2158289
005 2023-11-13
008 2024 bl uuuu u00u1 u #d
100 1 $aSANTOS, A. D.
245 $aEnvironmental factors influence the production of flowers and fruits of cassava.$h[electronic resource]
260 $c2024
300 $a14 p.$cil.
520 $aCassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that temperature and accumulated degree days are environmental factors correlated with increased flowering in cassava. Moreover, the dispersion of the genotypes in the two principal component analysis showed differences across the six planting seasons, indicating the environmental influence on the expression of flowering in this species. These findings can help breeders make reliable decisions when setting up crossing fields to accelerate the acquisition of improved progenies.
650 $aCassava
650 $aFlowers
650 $aFruits
650 $aMandioca
700 1 $aSOUSA, M. B. e
700 1 $aALVES, A. A. C.
700 1 $aOLIVEIRA, E. J. de
773 $tScientia Horticulturae$gv. 323, 112498, 2024.
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