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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
27/08/2012 |
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Data da última atualização: |
10/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SCHWARTZ, G.; PEÑA-CLAROS, M.; LOPES, J. C. A.; GODEFRIDUS, M. J. M.; KANASHIRO, M. |
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Afiliação: |
GUSTAVO SCHWARTZ, CPATU; MARILEOS PEÑA-CLAROS, WAGENINGEN UNIVERSITY; JOSE DO CARMO ALVES LOPES, CPATU; M. J. MOHREN GODEFRIDUS, WAGENINGEN UNIVERSITY; MILTON KANASHIRO, CPATU. |
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Título: |
Mid-term effects of reduced-impact logging on the regeneration of seven tree commercial species in the Eastern Amazon. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 274, p. 116-125, Jun. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Reduced-impact logging (RIL) is a set of techniques aimed to maintain forest structure and functions of the harvested forest as similar as possible to pre-logging status, while reducing adverse impacts from logging activity on the remaining forest. We analysed the mid-term effects of RIL on the regeneration of the long-lived pioneers (LLP) Bagassa guianensis and Jacaranda copaia; the partially shade tolerant (PST) Hymenaea courbaril, Dipteryx odorata, and Carapa guianensis and the total shade tolerant species (TST) Symphonia globulifera and Manilkara huberi. This study was carried out in an intensive study plot in the 600,000-ha Tapajós National Forest, Eastern Amazon ? Brazil (03 020S and 54 560W). Three transects split in 10 10 m plots, adding up to 2.37 ha were sampled in an area where RIL was applied, and compared with a same size sampling in an unlogged area. The regeneration of individuals 620 cm in dbh was inventoried and measured before logging in 2003 and three times after logging (2004, 2006, and 2009). RIL modi?ed the forest structure creating more gap-phase plots, with the consequences of such disturbance still remaining after 6 years. Densities of B. guianensis, J. copaia, and S. globulifera increased, while C. guianensis diminished. The positive effect on the density of LLP species was, however, ephemeral and disappeared 2 years after logging. RIL had a positive effect on the height growth rate of S. globulifera and on the dbh growth rate of C. guianensis. Plants growing in the gap-phase plots had higher height growth rates (ANOVA, F2;2980 = 33.3, p < 0.001) than plants growing in other phases, but the same difference was not observed for dbh growth rates (ANOVA, F1;364 = 0.9, p = 0.33). Crown position had positive effects on height and dbh growth rates: the higher the crown position, the faster the plant grows in height (ANOVA, F3;2979 = 148.4, p < 0.001) and dbh (ANOVA, F3;362 = 26.1, p < 0.001). The application of RIL following the Brazilian regulations, may be considered a silvicultural technique for increasing density and growth rates of commercial species, but additional silvicultural interventions, as liberation for example, might be required for maintaining the ecological outcomes of RIL in the long run. MenosReduced-impact logging (RIL) is a set of techniques aimed to maintain forest structure and functions of the harvested forest as similar as possible to pre-logging status, while reducing adverse impacts from logging activity on the remaining forest. We analysed the mid-term effects of RIL on the regeneration of the long-lived pioneers (LLP) Bagassa guianensis and Jacaranda copaia; the partially shade tolerant (PST) Hymenaea courbaril, Dipteryx odorata, and Carapa guianensis and the total shade tolerant species (TST) Symphonia globulifera and Manilkara huberi. This study was carried out in an intensive study plot in the 600,000-ha Tapajós National Forest, Eastern Amazon ? Brazil (03 020S and 54 560W). Three transects split in 10 10 m plots, adding up to 2.37 ha were sampled in an area where RIL was applied, and compared with a same size sampling in an unlogged area. The regeneration of individuals 620 cm in dbh was inventoried and measured before logging in 2003 and three times after logging (2004, 2006, and 2009). RIL modi?ed the forest structure creating more gap-phase plots, with the consequences of such disturbance still remaining after 6 years. Densities of B. guianensis, J. copaia, and S. globulifera increased, while C. guianensis diminished. The positive effect on the density of LLP species was, however, ephemeral and disappeared 2 years after logging. RIL had a positive effect on the height growth rate of S. globulifera and on the dbh growth rate of C. guianensis. Plan... Mostrar Tudo |
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Thesagro: |
Árvore; Regeneração. |
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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 02908naa a2200205 a 4500
001 1932244
005 2022-11-10
008 2012 bl uuuu u00u1 u #d
100 1 $aSCHWARTZ, G.
245 $aMid-term effects of reduced-impact logging on the regeneration of seven tree commercial species in the Eastern Amazon.$h[electronic resource]
260 $c2012
520 $aReduced-impact logging (RIL) is a set of techniques aimed to maintain forest structure and functions of the harvested forest as similar as possible to pre-logging status, while reducing adverse impacts from logging activity on the remaining forest. We analysed the mid-term effects of RIL on the regeneration of the long-lived pioneers (LLP) Bagassa guianensis and Jacaranda copaia; the partially shade tolerant (PST) Hymenaea courbaril, Dipteryx odorata, and Carapa guianensis and the total shade tolerant species (TST) Symphonia globulifera and Manilkara huberi. This study was carried out in an intensive study plot in the 600,000-ha Tapajós National Forest, Eastern Amazon ? Brazil (03 020S and 54 560W). Three transects split in 10 10 m plots, adding up to 2.37 ha were sampled in an area where RIL was applied, and compared with a same size sampling in an unlogged area. The regeneration of individuals 620 cm in dbh was inventoried and measured before logging in 2003 and three times after logging (2004, 2006, and 2009). RIL modi?ed the forest structure creating more gap-phase plots, with the consequences of such disturbance still remaining after 6 years. Densities of B. guianensis, J. copaia, and S. globulifera increased, while C. guianensis diminished. The positive effect on the density of LLP species was, however, ephemeral and disappeared 2 years after logging. RIL had a positive effect on the height growth rate of S. globulifera and on the dbh growth rate of C. guianensis. Plants growing in the gap-phase plots had higher height growth rates (ANOVA, F2;2980 = 33.3, p < 0.001) than plants growing in other phases, but the same difference was not observed for dbh growth rates (ANOVA, F1;364 = 0.9, p = 0.33). Crown position had positive effects on height and dbh growth rates: the higher the crown position, the faster the plant grows in height (ANOVA, F3;2979 = 148.4, p < 0.001) and dbh (ANOVA, F3;362 = 26.1, p < 0.001). The application of RIL following the Brazilian regulations, may be considered a silvicultural technique for increasing density and growth rates of commercial species, but additional silvicultural interventions, as liberation for example, might be required for maintaining the ecological outcomes of RIL in the long run.
650 $aAmazonia
650 $aÁrvore
650 $aRegeneração
700 1 $aPEÑA-CLAROS, M.
700 1 $aLOPES, J. C. A.
700 1 $aGODEFRIDUS, M. J. M.
700 1 $aKANASHIRO, M.
773 $tForest Ecology and Management$gv. 274, p. 116-125, Jun. 2012.
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
04/09/2014 |
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Data da última atualização: |
12/08/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ARAÚJO, E, F.; ANDRADE JUNIOR, A. S. de; SILVA, E. M.; SANTOS, E, de O.; SOUZA, K. B. de. |
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Afiliação: |
EMANUEL FRANÇA ARAÚJO, UFPI, Bom Jesus/PI.; ADERSON SOARES DE ANDRADE JUNIOR, CPAMN; EVERALDO MOREIRA SILVA, UFPI/CPCE Bom Jesus/PI.; EDSON DE OLIVEIRA SANTOS, UFPI, Bom Jesus/PI.; KAÍSE BARBOSA DE SOUZA, UFPI, Bom Jesus/PI. |
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Título: |
Comparação de seis métodos empíricos de estimativa da evapotranspiração de referência para a cidade de Picos - PI. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENGENHARIA AGRÍCOLA, 43., 2014, Campo Grande-MS. Resumos expandidos... Campo Grande-MS: SBEA, 2014. |
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Idioma: |
Português |
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Notas: |
CONBEA 2014. |
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Conteúdo: |
A evapotranspiração de referência (ETo) sendo quantificada diariamente é a base para se determinar a lâmina de irrigação a ser aplicada aos cultivos. Este trabalho objetivou comparar e avaliar o desempenho de métodos empíricos de estimativa da ETo, de modo a proporcionar maior acessibilidade à estimativa de ETo no município de Picos, Piauí. Os dados climáticos foram obtidos junto ao Instituto Nacional de Meteorologia (INMET), em escala diária referentes ao período chuvoso (novembro a abril) e seco (maio a outubro), nos anos de 2010 a 2012. Os métodos de estimativa de ETo avaliados foram os de Makking (MK), Hargreaves-Samani (HS), Blaney-Criddle (BC), Ivanov (IVN) Jensen-Haise (JH), Camargo (CM), e Priestley-Taylor (PT), admitindo como método padrão para comparação o de Penman-Monteith FAO (PM-FAO 56). Foram realizados cálculos do erro padrão da estimativa (EPE), dos coeficientes de determinação (R2), correlação (r), índice de Willmott (d) e de confiança (c). Os modelos JH, HS e CM foram os que mais se aproximaram do padrão de FAO para média mensal. Em relação ao período chuvoso e seco, o método JH apresentou o melhor desempenho para ambos os períodos, seguido dos métodos PT e MK para o período chuvoso e PT para o período seco. |
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Palavras-Chave: |
FAO Penman-Monteith. |
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Thesagro: |
Evapotranspiração; Irrigação. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/107823/1/R0311-1.pdf
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Marc: |
LEADER 02023nam a2200205 a 4500
001 1994296
005 2023-08-12
008 2014 bl uuuu u00u1 u #d
100 1 $aARAÚJO, E, F.
245 $aComparação de seis métodos empíricos de estimativa da evapotranspiração de referência para a cidade de Picos - PI.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ENGENHARIA AGRÍCOLA, 43., 2014, Campo Grande-MS. Resumos expandidos... Campo Grande-MS: SBEA$c2014
500 $aCONBEA 2014.
520 $aA evapotranspiração de referência (ETo) sendo quantificada diariamente é a base para se determinar a lâmina de irrigação a ser aplicada aos cultivos. Este trabalho objetivou comparar e avaliar o desempenho de métodos empíricos de estimativa da ETo, de modo a proporcionar maior acessibilidade à estimativa de ETo no município de Picos, Piauí. Os dados climáticos foram obtidos junto ao Instituto Nacional de Meteorologia (INMET), em escala diária referentes ao período chuvoso (novembro a abril) e seco (maio a outubro), nos anos de 2010 a 2012. Os métodos de estimativa de ETo avaliados foram os de Makking (MK), Hargreaves-Samani (HS), Blaney-Criddle (BC), Ivanov (IVN) Jensen-Haise (JH), Camargo (CM), e Priestley-Taylor (PT), admitindo como método padrão para comparação o de Penman-Monteith FAO (PM-FAO 56). Foram realizados cálculos do erro padrão da estimativa (EPE), dos coeficientes de determinação (R2), correlação (r), índice de Willmott (d) e de confiança (c). Os modelos JH, HS e CM foram os que mais se aproximaram do padrão de FAO para média mensal. Em relação ao período chuvoso e seco, o método JH apresentou o melhor desempenho para ambos os períodos, seguido dos métodos PT e MK para o período chuvoso e PT para o período seco.
650 $aEvapotranspiração
650 $aIrrigação
653 $aFAO Penman-Monteith
700 1 $aANDRADE JUNIOR, A. S. de
700 1 $aSILVA, E. M.
700 1 $aSANTOS, E, de O.
700 1 $aSOUZA, K. B. de
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