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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Mandioca e Fruticultura; Embrapa Meio-Norte; Embrapa Semiárido. |
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Data corrente: |
25/07/2000 |
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Data da última atualização: |
05/06/2023 |
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Autoria: |
FUKUDA, W. M. G.; FUKUDA, C.; CARDOSO, C. E. L.; VASCONCELOS, O. L.; NUNES, L. C. |
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Afiliação: |
WANIA MARIA GONÇALVES FUKUDA; CHIGERU FUKUDA; CARLOS ESTEVAO LEITE CARDOSO, CNPMF; OSÓRIO LIMA VASCONCELOS; LUIS CARLOS NUNES. |
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Título: |
Implantação e evolução dos trabalhos de pesquisa participativa em melhoramento de mandioca no Nordeste Brasileiro. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Cruz das Almas: Embrapa Mandioca e Fruticultura, 2000. |
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Páginas: |
31 p. |
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Descrição Física: |
il. |
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Série: |
(Embrapa Mandioca e Fruticultura. Documentos, 92). |
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ISSN: |
1516-5728 |
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Idioma: |
Português |
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Notas: |
Memória. |
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Conteúdo: |
Este trabalho faz um breve historico sobre a implantacao e os avancos da pesquisa participativa em melhoramento de mandioca (PPMM) no Nordeste do Brasil, desenvolvida pela Embrapa Mandioca e Fruticultura. A metodologia foi desenvolvida inicialmente no Centro Internacional de Agricultura Tropical (CIAT), na Colombia e introduzida e adaptada as condicoes da regiao semi-arida do Nordeste brasileiro a partir de 1993. Os primeiros resultados demonstraram que a metodologia de PPMM como um complemento ao metodo convencional de melhoramento genetico da cultura, se adapta bem ao perfil do agricultor de mandioca do Nordeste e funciona como uma ferramenta eficiente na transferencia e difusao de novas variedades melhoradas. Alguns impactos intermediarios decorrentes deste trabalho ja foram identificados, como a adocao de novas variedades de mandioca pelos agricultores, a amplicacao da diversidade genetica nas lavouras e a capacitacao de tecnicos em metodologia de pesquisa participativa. Conclui-se que com esse novo enfoque, o melhoramento de mandioca podera contribuir de uma forma mais efetiva para o desenvolvimento do agronegocio da mandioca no Nordeste. Outras regioes do Brasil tambem poderao ser beneficiadas com a implantacao dessa metodologia, principalmente atraves de treinamentos de pessoal. |
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Palavras-Chave: |
Análise do gênero; Avaliacao participativa; Brasil; Breedings; Caracteristicas do Ecossistema; Criterio; Manihot esculentum; Nordeste; Northeast; Participatory evaluation; Selection; Varidade. |
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Thesagro: |
Mandioca; Melhoramento; Melhoramento Genético Vegetal; Seleção; Variedade. |
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Thesaurus Nal: |
Brazil; cassava; varieties. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/81562/1/Implantacao-evolucao-Wania-Fukuda-Docuemntos-92-2000.pdf
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Marc: |
LEADER 02555nam a2200445 a 4500
001 1639571
005 2023-06-05
008 2000 bl uuuu u0uu1 u #d
022 $a1516-5728
100 1 $aFUKUDA, W. M. G.
245 $aImplantação e evolução dos trabalhos de pesquisa participativa em melhoramento de mandioca no Nordeste Brasileiro.
260 $aCruz das Almas: Embrapa Mandioca e Fruticultura$c2000
300 $a31 p.$cil.
490 $a(Embrapa Mandioca e Fruticultura. Documentos, 92).
500 $aMemória.
520 $aEste trabalho faz um breve historico sobre a implantacao e os avancos da pesquisa participativa em melhoramento de mandioca (PPMM) no Nordeste do Brasil, desenvolvida pela Embrapa Mandioca e Fruticultura. A metodologia foi desenvolvida inicialmente no Centro Internacional de Agricultura Tropical (CIAT), na Colombia e introduzida e adaptada as condicoes da regiao semi-arida do Nordeste brasileiro a partir de 1993. Os primeiros resultados demonstraram que a metodologia de PPMM como um complemento ao metodo convencional de melhoramento genetico da cultura, se adapta bem ao perfil do agricultor de mandioca do Nordeste e funciona como uma ferramenta eficiente na transferencia e difusao de novas variedades melhoradas. Alguns impactos intermediarios decorrentes deste trabalho ja foram identificados, como a adocao de novas variedades de mandioca pelos agricultores, a amplicacao da diversidade genetica nas lavouras e a capacitacao de tecnicos em metodologia de pesquisa participativa. Conclui-se que com esse novo enfoque, o melhoramento de mandioca podera contribuir de uma forma mais efetiva para o desenvolvimento do agronegocio da mandioca no Nordeste. Outras regioes do Brasil tambem poderao ser beneficiadas com a implantacao dessa metodologia, principalmente atraves de treinamentos de pessoal.
650 $aBrazil
650 $acassava
650 $avarieties
650 $aMandioca
650 $aMelhoramento
650 $aMelhoramento Genético Vegetal
650 $aSeleção
650 $aVariedade
653 $aAnálise do gênero
653 $aAvaliacao participativa
653 $aBrasil
653 $aBreedings
653 $aCaracteristicas do Ecossistema
653 $aCriterio
653 $aManihot esculentum
653 $aNordeste
653 $aNortheast
653 $aParticipatory evaluation
653 $aSelection
653 $aVaridade
700 1 $aFUKUDA, C.
700 1 $aCARDOSO, C. E. L.
700 1 $aVASCONCELOS, O. L.
700 1 $aNUNES, L. C.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
26/11/2013 |
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Data da última atualização: |
18/02/2015 |
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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: |
CARDOSO, D. J.; LACERDA, A. E. B. de; ROSOT, M. A. D.; GARRASTAZU, M. C.; LIMA, R. T. |
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Afiliação: |
DENISE JETON CARDOSO, CNPF; ANDRE EDUARDO BISCAIA DE LACERDA, CNPF; MARIA AUGUSTA DOETZER ROSOT, CNPF; MARILICE CORDEIRO GARRASTAZU, CNPF; RENATO TEIXEIRA LIMA, VALOR FLORESTAL. |
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Título: |
Influence of spacing regimes on the development of loblolly pine (Pinus taeda L.) in Southern Brazil. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Forest Ecology and Management, n. 310, p. 761-769, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
The economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relation to volume per hectare and stand basal area at the end of the 24 year cycle. Our results demonstrate that it is possible to obtain the same volume per hectare, on average 385.7 m3 ha1, at the age of harvesting by combining different initial spacings with thinning intensities. The mean annual increment (MAI) was analyzed by reconstructing growth (volume) using the software Pisapro. The simulations showed that MAI has a positive correlation with initial spacing in which the densest spacing obtained a MAI approximately 45% higher than the widest treatment. The results provide managers with long-term data that can be used in forest management planning, e.g. by allowing companies to adjust their operations depending on the costs of planting, maintenance and other cultural treatments. The results also point out that depending on the aim of the production, initial spacing and thinning can be adjusted to meet target product specifications (e.g. larger dbh, lack of knots). MenosThe economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relatio... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Espécie exótica; Espécie florestal. |
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Thesagro: |
Densidade de Plantio; Pinus Taeda. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03175naa a2200229 a 4500
001 1972136
005 2015-02-18
008 2013 bl uuuu u00u1 u #d
100 1 $aCARDOSO, D. J.
245 $aInfluence of spacing regimes on the development of loblolly pine (Pinus taeda L.) in Southern Brazil.$h[electronic resource]
260 $c2013
520 $aThe economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relation to volume per hectare and stand basal area at the end of the 24 year cycle. Our results demonstrate that it is possible to obtain the same volume per hectare, on average 385.7 m3 ha1, at the age of harvesting by combining different initial spacings with thinning intensities. The mean annual increment (MAI) was analyzed by reconstructing growth (volume) using the software Pisapro. The simulations showed that MAI has a positive correlation with initial spacing in which the densest spacing obtained a MAI approximately 45% higher than the widest treatment. The results provide managers with long-term data that can be used in forest management planning, e.g. by allowing companies to adjust their operations depending on the costs of planting, maintenance and other cultural treatments. The results also point out that depending on the aim of the production, initial spacing and thinning can be adjusted to meet target product specifications (e.g. larger dbh, lack of knots).
650 $aDensidade de Plantio
650 $aPinus Taeda
653 $aBrasil
653 $aEspécie exótica
653 $aEspécie florestal
700 1 $aLACERDA, A. E. B. de
700 1 $aROSOT, M. A. D.
700 1 $aGARRASTAZU, M. C.
700 1 $aLIMA, R. T.
773 $tForest Ecology and Management$gn. 310, p. 761-769, 2013.
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Embrapa Florestas (CNPF) |
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