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 | Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
12/03/2019 |
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Data da última atualização: |
12/03/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COSTA, A. G. F.; SEVERINO, L. S.; SOFIATTI, V.; FREITAS, J. G.; GONDIM, T. M. de S.; CARDOSO, G. D. |
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Afiliação: |
AUGUSTO GUERREIRO FONTOURA COSTA, CNPA; LIV SOARES SEVERINO, CNPA; VALDINEI SOFIATTI, CNPA; JALMI GUEDES FREITAS, CNPA; TARCISIO MARCOS DE SOUZA GONDIM, CNPA; GLEIBSON DIONIZIO CARDOSO, CNPA. |
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Título: |
Pre-harvest desiccation of castor crop using 2,4-D and glyphosate. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Industrial Crops and Products, v. 122, p. 261-265, 2018. |
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DOI: |
https://doi.org/10.1016/j.indcrop.2018.05.070 |
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Idioma: |
Inglês |
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Conteúdo: |
Castor is an industrial crop that depends on mechanization of harvest for increased production. The presence of green leaves and fresh fruits at harvest time affects the combine operation. Defoliation and desiccation are thus a requirement for efficient mechanized harvest. Desiccation was evaluated in castor crop sprayed with combi- nations of 2,4-D and glyphosate. The 12 treatments were combinations of two doses of 2,4-D (670 and 1340 g ha-1 of the a.i.) with three doses of glyphosate (1440, 1880, and 2160 g ha-1 of the a.i.), the same doses isolated, and a control treatment. The herbicides were sprayed at 90 days after emergence, and irrigation was continued until the harvest 21 days later. It was found that 2,4-D promoted full desiccation at any dose re- gardless of association with glyphosate, and the plants were killed one week after spraying. Glyphosate did not promote complete desiccation of castor plants in the doses tested. Seed yield was not affected in any treatment. |
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Thesagro: |
Herbicida Dessecante; Mamona. |
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Thesaurus Nal: |
Desiccation (plant physiology); Glyphosate; Herbicides. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 01750naa a2200253 a 4500
001 2106932
005 2019-03-12
008 2018 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.indcrop.2018.05.070$2DOI
100 1 $aCOSTA, A. G. F.
245 $aPre-harvest desiccation of castor crop using 2,4-D and glyphosate.$h[electronic resource]
260 $c2018
520 $aCastor is an industrial crop that depends on mechanization of harvest for increased production. The presence of green leaves and fresh fruits at harvest time affects the combine operation. Defoliation and desiccation are thus a requirement for efficient mechanized harvest. Desiccation was evaluated in castor crop sprayed with combi- nations of 2,4-D and glyphosate. The 12 treatments were combinations of two doses of 2,4-D (670 and 1340 g ha-1 of the a.i.) with three doses of glyphosate (1440, 1880, and 2160 g ha-1 of the a.i.), the same doses isolated, and a control treatment. The herbicides were sprayed at 90 days after emergence, and irrigation was continued until the harvest 21 days later. It was found that 2,4-D promoted full desiccation at any dose re- gardless of association with glyphosate, and the plants were killed one week after spraying. Glyphosate did not promote complete desiccation of castor plants in the doses tested. Seed yield was not affected in any treatment.
650 $aDesiccation (plant physiology)
650 $aGlyphosate
650 $aHerbicides
650 $aHerbicida Dessecante
650 $aMamona
700 1 $aSEVERINO, L. S.
700 1 $aSOFIATTI, V.
700 1 $aFREITAS, J. G.
700 1 $aGONDIM, T. M. de S.
700 1 $aCARDOSO, G. D.
773 $tIndustrial Crops and Products$gv. 122, p. 261-265, 2018.
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Embrapa Algodão (CNPA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
01/10/2015 |
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Data da última atualização: |
30/05/2022 |
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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: |
AVILA, A. L. de; RUSCHEL, A. R.; CARVALHO, J. O. P. de; MAZZEI, L.; SILVA, J. N. M.; LOPES, J. do C.; ARAUJO, M. M.; DORMANN, C. F.; BAUHUS, J. |
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Afiliação: |
Angela Luciana de Avila, University of Freiburg; ADEMIR ROBERTO RUSCHEL, CPATU; João Olegário Pereira de Carvalho, UFRA; LUCAS JOSE MAZZEI DE FREITAS, CPATU; José Natalino Macedo Silva, UFRA; JOSE DO CARMO ALVES LOPES, CPATU; Maristela Machado Araujo, UFSM; Carsten F. Dormann, University of Freiburg; Jürgen Bauhus, University of Freiburg. |
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Título: |
Medium-term dynamics of tree species composition in response to silvicultural intervention intensities in a tropical rain forest. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Biological Conservation, v. 191, p. 577-586, Nov. 2015. |
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DOI: |
http://dx.doi.org/10.1016/j.biocon.2015.08.004 |
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Idioma: |
Inglês |
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Conteúdo: |
Managed forests are important landscape components in tropical regions and may contribute to biodiversity conservation. Yet, managing tropical forests sustainably requires an understanding of ecosystem responses to silvicultural interventions. We investigated how silvicultural intervention intensity affects tree species composition and diversity over 30 years in the Brazilian Amazon by comparing them to pre-logging conditions and to an unlogged control. The interventions comprised logging in 1982 and thinning in 1993?1994 and ranged in intensity from 19 to 53% reduction in the original basal area (BA). Trees with a diameter at breast height (DBH) ≥ 5 cm were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. Silvicultural intervention intensity influenced both tree species composition and its trajectory within 30 years. In contrast, tree species diversity was not impaired. High intervention intensities (with BA reduction > 6.6 m2 ha− 1) had a substantial influence on the community of trees (DBH ≥ 10 cm), which did not show signs of return to pre-logging species composition. The reduction of BA through harvesting damage and thinning had a stronger effect on species composition than logging of mature trees itself. Thus, damage should be kept to a minimal level and strong thinning interventions should be avoided. This may enhance ecosystem recovery and maintenance of biodiversity at other trophic levels. Since current permitted harvesting intensities in the Brazilian Amazon are lower than the lowest intensity examined in our study, legal harvesting practices are unlikely to cause substantial, long-term changes in tree species composition. MenosManaged forests are important landscape components in tropical regions and may contribute to biodiversity conservation. Yet, managing tropical forests sustainably requires an understanding of ecosystem responses to silvicultural interventions. We investigated how silvicultural intervention intensity affects tree species composition and diversity over 30 years in the Brazilian Amazon by comparing them to pre-logging conditions and to an unlogged control. The interventions comprised logging in 1982 and thinning in 1993?1994 and ranged in intensity from 19 to 53% reduction in the original basal area (BA). Trees with a diameter at breast height (DBH) ≥ 5 cm were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. Silvicultural intervention intensity influenced both tree species composition and its trajectory within 30 years. In contrast, tree species diversity was not impaired. High intervention intensities (with BA reduction > 6.6 m2 ha− 1) had a substantial influence on the community of trees (DBH ≥ 10 cm), which did not show signs of return to pre-logging species composition. The reduction of BA through harvesting damage and thinning had a stronger effect on species composition than logging of mature trees itself. Thus, damage should be kept to a minimal level and strong thinning interventions should be avoided. This may enhance ecosystem recovery and maintenance of biodiversity at other trophic levels. Since current permitted harvestin... Mostrar Tudo |
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Palavras-Chave: |
Diversidade; Exploração; Recuperação florestal. |
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Thesagro: |
Madeira. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02601naa a2200289 a 4500
001 2025610
005 2022-05-30
008 2015 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.biocon.2015.08.004$2DOI
100 1 $aAVILA, A. L. de
245 $aMedium-term dynamics of tree species composition in response to silvicultural intervention intensities in a tropical rain forest.$h[electronic resource]
260 $c2015
520 $aManaged forests are important landscape components in tropical regions and may contribute to biodiversity conservation. Yet, managing tropical forests sustainably requires an understanding of ecosystem responses to silvicultural interventions. We investigated how silvicultural intervention intensity affects tree species composition and diversity over 30 years in the Brazilian Amazon by comparing them to pre-logging conditions and to an unlogged control. The interventions comprised logging in 1982 and thinning in 1993?1994 and ranged in intensity from 19 to 53% reduction in the original basal area (BA). Trees with a diameter at breast height (DBH) ≥ 5 cm were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. Silvicultural intervention intensity influenced both tree species composition and its trajectory within 30 years. In contrast, tree species diversity was not impaired. High intervention intensities (with BA reduction > 6.6 m2 ha− 1) had a substantial influence on the community of trees (DBH ≥ 10 cm), which did not show signs of return to pre-logging species composition. The reduction of BA through harvesting damage and thinning had a stronger effect on species composition than logging of mature trees itself. Thus, damage should be kept to a minimal level and strong thinning interventions should be avoided. This may enhance ecosystem recovery and maintenance of biodiversity at other trophic levels. Since current permitted harvesting intensities in the Brazilian Amazon are lower than the lowest intensity examined in our study, legal harvesting practices are unlikely to cause substantial, long-term changes in tree species composition.
650 $aAmazonia
650 $aMadeira
653 $aDiversidade
653 $aExploração
653 $aRecuperação florestal
700 1 $aRUSCHEL, A. R.
700 1 $aCARVALHO, J. O. P. de
700 1 $aMAZZEI, L.
700 1 $aSILVA, J. N. M.
700 1 $aLOPES, J. do C.
700 1 $aARAUJO, M. M.
700 1 $aDORMANN, C. F.
700 1 $aBAUHUS, J.
773 $tBiological Conservation$gv. 191, p. 577-586, Nov. 2015.
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