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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido; Embrapa Unidades Centrais. |
Data corrente: |
25/06/1996 |
Data da última atualização: |
06/11/2023 |
Tipo da produção científica: |
Documentos |
Autoria: |
LIMA, M. G. de. |
Afiliação: |
MILCIADES GADELHA DE LIMA, CPATSA. |
Título: |
Análise dos dados meteorológicos da Estação Experimental de Mandacaru em Juazeiro, BA. |
Ano de publicação: |
1980 |
Fonte/Imprenta: |
Petrolina: EMBRAPA-CPATSA, 1980. |
Páginas: |
26 p. |
Série: |
(EMBRAPA-CPATSA. Documentos, 3). |
Idioma: |
Português |
Conteúdo: |
O estudo teve como objetivo fornecer subsidios aos tecnicos que lidam com a agropecuaria, neste regiao, apresentam-se o conjunto de dados obtidos, efetuando-se uma analise resumida dos mesmos. |
Palavras-Chave: |
Natural resource; Precipitação pluviométrica; Recursos naturais; Umidade do ar. |
Thesagro: |
Clima; Evaporação; Insolação; Meteorologia; Recurso natural; Temperatura. |
Thesaurus Nal: |
Natural resources. |
Categoria do assunto: |
-- P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/127563/1/n-3-Analise-dos-dados-meteorologicos.pdf
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Marc: |
LEADER 00933nam a2200265 a 4500 001 1127563 005 2023-11-06 008 1980 bl uuuu u0uu1 u #d 100 1 $aLIMA, M. G. de 245 $aAnálise dos dados meteorológicos da Estação Experimental de Mandacaru em Juazeiro, BA. 260 $aPetrolina: EMBRAPA-CPATSA$c1980 300 $a26 p. 490 $a(EMBRAPA-CPATSA. Documentos, 3). 520 $aO estudo teve como objetivo fornecer subsidios aos tecnicos que lidam com a agropecuaria, neste regiao, apresentam-se o conjunto de dados obtidos, efetuando-se uma analise resumida dos mesmos. 650 $aNatural resources 650 $aClima 650 $aEvaporação 650 $aInsolação 650 $aMeteorologia 650 $aRecurso natural 650 $aTemperatura 653 $aNatural resource 653 $aPrecipitação pluviométrica 653 $aRecursos naturais 653 $aUmidade do ar
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Embrapa Semiárido (CPATSA) |
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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. |
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
02/01/2017 |
Data da última atualização: |
20/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
AVILA, A. L. de; SCHWARTZ, G.; RUSCHEL, A. R.; LOPES, J. do C.; SILVA, J. N. M.; CARVALHO, J. O. P. de; DORMANN, C. F.; MAZZEI, L.; SOARES, M. H. M.; BAUHUS, J. |
Afiliação: |
Angela Luciana de Avila, University of Freiburg; GUSTAVO SCHWARTZ, CPATU; ADEMIR ROBERTO RUSCHEL, CPATU; JOSE DO CARMO ALVES LOPES, CPATU; José Natalino Macedo Silva, UFRA; João Olegário Pereira de Carvalho, UFRA; Carsten F. Dormann, University of Freiburg; LUCAS JOSE MAZZEI DE FREITAS, CPATU; MARCIO HOFMANN MOTA SOARES, CPATU; Jürgen Bauhus, University of Freiburg. |
Título: |
Recruitment, growth and recovery of commercial tree species over 30 years following logging and thinning in a tropical rain forest. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Forest Ecology and Management, v. 385, p. 225-235, Feb. 2017. |
DOI: |
http:// dx.doi.org/10.1016/j.foreco.2016.11.039 |
Idioma: |
Inglês |
Conteúdo: |
Sustainable production of timber from commercial species across felling cycles is a core challenge for tropical silviculture. In this study, we analysed how the intensity and type (harvesting and thinning) of silvicultural interventions affect: (a) recruitment of small stems (5 cm 6 DBH < 15 cm), (b) increment of future crop trees (15 cm 6 DBH < 50 cm) and (c) recovery of harvestable growing stocks (DBHP50 cm) of 52 commercial timber species in the Tapajós National Forest, Brazil. Intervention intensities comprised logging (on average 61 m3 ha1) and associated damage to remaining trees (1982) and thinning (refinement) to reduce basal area at the stand level (1993/1994). These interventions together resulted in a gradient of reduction in basal-area from 19 to 53% relative to pre-logging stocks. Trees (DBHP5 cm) were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. The dynamics were analysed at the stand level over 30 years and compared among treatments (including unlogged forest) and to pre-logging stands. Recruitment and growth temporarily increased following interventions and recovery of harvestable growing stock decreased with intervention intensity. Harvesting substantially increased recruitment of small stems relative to the unlogged forest, but recruitment rates decreased over time and did not increase following thinning. Gross increment of future crop trees was higher in logged than in unlogged forest and increased over time with high intensity of followup thinning, where it remained significantly higher than in control plots over time. Increased recruitment rates and volume increments were mainly driven by long-lived pioneer species, changing the composition of the growing stock. In 2012, recovery of harvestable growing stock of the 22 species harvested in 1982 varied between 19% and 57% in logged treatments relative to pre-logging levels. When considering an additional group of 30 species that were not harvested in the permanent sample plots but are now potentially commercial, relative recovery increased enough to support a second harvest under the present regulations (maximum harvest of 30 m3 ha1), except for treatment with high thinning intensity where stocks were still less than 30% relative to pre-harvest levels. In contrast, light and medium thinning intensity promoted recovery of harvestable growing stock. These findings indicate that intensive thinning should be avoided and silvicultural interventions oriented towards future crop trees of target species should be adopted. This may enhance recovery and reduce unintended changes in composition of the commercial growing stock. MenosSustainable production of timber from commercial species across felling cycles is a core challenge for tropical silviculture. In this study, we analysed how the intensity and type (harvesting and thinning) of silvicultural interventions affect: (a) recruitment of small stems (5 cm 6 DBH < 15 cm), (b) increment of future crop trees (15 cm 6 DBH < 50 cm) and (c) recovery of harvestable growing stocks (DBHP50 cm) of 52 commercial timber species in the Tapajós National Forest, Brazil. Intervention intensities comprised logging (on average 61 m3 ha1) and associated damage to remaining trees (1982) and thinning (refinement) to reduce basal area at the stand level (1993/1994). These interventions together resulted in a gradient of reduction in basal-area from 19 to 53% relative to pre-logging stocks. Trees (DBHP5 cm) were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. The dynamics were analysed at the stand level over 30 years and compared among treatments (including unlogged forest) and to pre-logging stands. Recruitment and growth temporarily increased following interventions and recovery of harvestable growing stock decreased with intervention intensity. Harvesting substantially increased recruitment of small stems relative to the unlogged forest, but recruitment rates decreased over time and did not increase following thinning. Gross increment of future crop trees was higher in logged than in unlogged forest and increased over time with high intensity... Mostrar Tudo |
Palavras-Chave: |
Exploração madeireira; Recuperação; Sistema silvicultural policíclico. |
Thesagro: |
Floresta Tropical. |
Thesaurus NAL: |
Amazonia. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 03635naa a2200301 a 4500 001 2059750 005 2022-05-20 008 2017 bl uuuu u00u1 u #d 024 7 $ahttp:// dx.doi.org/10.1016/j.foreco.2016.11.039$2DOI 100 1 $aAVILA, A. L. de 245 $aRecruitment, growth and recovery of commercial tree species over 30 years following logging and thinning in a tropical rain forest.$h[electronic resource] 260 $c2017 520 $aSustainable production of timber from commercial species across felling cycles is a core challenge for tropical silviculture. In this study, we analysed how the intensity and type (harvesting and thinning) of silvicultural interventions affect: (a) recruitment of small stems (5 cm 6 DBH < 15 cm), (b) increment of future crop trees (15 cm 6 DBH < 50 cm) and (c) recovery of harvestable growing stocks (DBHP50 cm) of 52 commercial timber species in the Tapajós National Forest, Brazil. Intervention intensities comprised logging (on average 61 m3 ha1) and associated damage to remaining trees (1982) and thinning (refinement) to reduce basal area at the stand level (1993/1994). These interventions together resulted in a gradient of reduction in basal-area from 19 to 53% relative to pre-logging stocks. Trees (DBHP5 cm) were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. The dynamics were analysed at the stand level over 30 years and compared among treatments (including unlogged forest) and to pre-logging stands. Recruitment and growth temporarily increased following interventions and recovery of harvestable growing stock decreased with intervention intensity. Harvesting substantially increased recruitment of small stems relative to the unlogged forest, but recruitment rates decreased over time and did not increase following thinning. Gross increment of future crop trees was higher in logged than in unlogged forest and increased over time with high intensity of followup thinning, where it remained significantly higher than in control plots over time. Increased recruitment rates and volume increments were mainly driven by long-lived pioneer species, changing the composition of the growing stock. In 2012, recovery of harvestable growing stock of the 22 species harvested in 1982 varied between 19% and 57% in logged treatments relative to pre-logging levels. When considering an additional group of 30 species that were not harvested in the permanent sample plots but are now potentially commercial, relative recovery increased enough to support a second harvest under the present regulations (maximum harvest of 30 m3 ha1), except for treatment with high thinning intensity where stocks were still less than 30% relative to pre-harvest levels. In contrast, light and medium thinning intensity promoted recovery of harvestable growing stock. These findings indicate that intensive thinning should be avoided and silvicultural interventions oriented towards future crop trees of target species should be adopted. This may enhance recovery and reduce unintended changes in composition of the commercial growing stock. 650 $aAmazonia 650 $aFloresta Tropical 653 $aExploração madeireira 653 $aRecuperação 653 $aSistema silvicultural policíclico 700 1 $aSCHWARTZ, G. 700 1 $aRUSCHEL, A. R. 700 1 $aLOPES, J. do C. 700 1 $aSILVA, J. N. M. 700 1 $aCARVALHO, J. O. P. de 700 1 $aDORMANN, C. F. 700 1 $aMAZZEI, L. 700 1 $aSOARES, M. H. M. 700 1 $aBAUHUS, J. 773 $tForest Ecology and Management$gv. 385, p. 225-235, Feb. 2017.
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