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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
27/11/2008 |
Data da última atualização: |
21/03/2013 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
GONÇALVES, F. J.; NUNES, C. M. C.; FILIPPI, M. C.; SIBOV, S. T. |
Afiliação: |
FABIO JOSE GONÇALVES, UFG; CAMILA MARILLAC COSTA NUNES, UFG; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; SERGIO TADEU SIBOV, UFG. |
Título: |
Isolamento de fungos micorrízicos de Cyrtopodium vernum, orquídea terrestre de campos rupestres do Estado de Goiás. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
In: CONGRESSO DE PESQUISA, ENSINO E EXTENSÃO, 5., 2008, Goiânia. Produção do conhecimento e transformação social: anais... Goiânia: Universidade Federal de Goiás, 2008. |
Descrição Física: |
1 CD-ROM. |
Idioma: |
Português |
Conteúdo: |
O objetivo deste trabalho foi isolar fungos associados a raízes de uma espécie de orquídea terrestre do gênero Cyrtopodium visando o melhor desenvolvimento de protocormos na propagação in vitro desta espécie. |
Palavras-Chave: |
Conpeex; Poletons. |
Thesagro: |
Cerrado; Orquídea; Simbiose. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/79569/1/pl-2008.101.pdf
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Marc: |
LEADER 00957nam a2200217 a 4500 001 1217545 005 2013-03-21 008 2008 bl uuuu u00u1 u #d 100 1 $aGONÇALVES, F. J. 245 $aIsolamento de fungos micorrízicos de Cyrtopodium vernum, orquídea terrestre de campos rupestres do Estado de Goiás. 260 $aIn: CONGRESSO DE PESQUISA, ENSINO E EXTENSÃO, 5., 2008, Goiânia. Produção do conhecimento e transformação social: anais... Goiânia: Universidade Federal de Goiás$c2008 300 $c1 CD-ROM. 520 $aO objetivo deste trabalho foi isolar fungos associados a raízes de uma espécie de orquídea terrestre do gênero Cyrtopodium visando o melhor desenvolvimento de protocormos na propagação in vitro desta espécie. 650 $aCerrado 650 $aOrquídea 650 $aSimbiose 653 $aConpeex 653 $aPoletons 700 1 $aNUNES, C. M. C. 700 1 $aFILIPPI, M. C. 700 1 $aSIBOV, S. T.
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Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
23/08/2018 |
Data da última atualização: |
01/10/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
VILLA, P. M.; MARTINS, S. V.; OLIVEIRA NETO, S. N. de; RODRIGUES, A. C.; MARTORANO, L. G.; MONSANTO, L. D.; CANCIO, N. M.; GASTAUER, M. |
Afiliação: |
Pedro Manuel Villa, UFV/Foundation for the Conservation of Biodiversity; Sebastião Venâncio Martins, UFV; Silvio Nolasco de Oliveira Neto, UFV; Alice Cristina Rodrigues, UFV; LUCIETA GUERREIRO MARTORANO, CPATU; Luisa Delgado Monsanto, National Institute of Agricultural Research; Norman Mota Cancio, National Institute of Agricultural Research; Markus Gastauer, Instituto Tecnológico Vale. |
Título: |
Intensification of shifting cultivation reduces forest resilience in the northern Amazon. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Forest Ecology and Management, v. 430, p. 312-320, 2018. |
DOI: |
10.1016/j.foreco.2018.08.014 |
Idioma: |
Português |
Conteúdo: |
Shifting cultivation is a traditional land-use system to ensure livelihood in the Northern Amazon. Here, we evaluated how intensification of shifting cultivation (SC) affects secondary forest recovery in the northern Amazon forest. To measure intensity of shifting cultivation, we used the number of previous SC cycles. We selected three study sites containing second-growth forest (SG) with different stand ages (5 and 10 years) after one, three or six SC cycles. Furthermore, we selected old-growth forest (OG) in each study site. In each selected SG and OG, three plots of 20×50m were established, totalizing 63 plots in the study area. In each plot, all trees, palms and lianas with diameter at breast height≥5 cm were tagged and identified to species level. We analyzed the effects of SC intensification and soil fertility on woody species richness, species composition and basal area using mixed effect models. Species richness and basal area, lower in SG than in OG, increased with regeneration time after abandonment, but reduced with intensification of SC. Community dissimilarities (Bray-Curtis distances) between OG and SG increased with the number of shifting cultivation cycles. Soil fertility differed between SG with different regeneration stages and reduced with number of SC cycles. We found that soil fertility and management intensity, i.e., number of previous SC cycles, explained pattern observed in richness, species composition and basal area equally good. Due to nutrient exports with crops and increasing nutrient leaching, soil fertility is expected to reduce with SC intensity. Therefore, our data indicate that intensification of SC reduces recovery of species richness, composition and basal area of SGs following productive periods. Thus, the intensification of SC reduces the resilience of SGs, turning this ancient form of land-use unsustainable. Environmental sustainability of SC may be achieved by extending fallow periods, limiting the maximum yield. To attend growing demands of indigenous and non-indigenous communities, we propose other alternatives of land-use such as permanent agroforestry systems. MenosShifting cultivation is a traditional land-use system to ensure livelihood in the Northern Amazon. Here, we evaluated how intensification of shifting cultivation (SC) affects secondary forest recovery in the northern Amazon forest. To measure intensity of shifting cultivation, we used the number of previous SC cycles. We selected three study sites containing second-growth forest (SG) with different stand ages (5 and 10 years) after one, three or six SC cycles. Furthermore, we selected old-growth forest (OG) in each study site. In each selected SG and OG, three plots of 20×50m were established, totalizing 63 plots in the study area. In each plot, all trees, palms and lianas with diameter at breast height≥5 cm were tagged and identified to species level. We analyzed the effects of SC intensification and soil fertility on woody species richness, species composition and basal area using mixed effect models. Species richness and basal area, lower in SG than in OG, increased with regeneration time after abandonment, but reduced with intensification of SC. Community dissimilarities (Bray-Curtis distances) between OG and SG increased with the number of shifting cultivation cycles. Soil fertility differed between SG with different regeneration stages and reduced with number of SC cycles. We found that soil fertility and management intensity, i.e., number of previous SC cycles, explained pattern observed in richness, species composition and basal area equally good. Due to nutrie... Mostrar Tudo |
Thesagro: |
Área Basal; Deterioração do Solo; Floresta Secundaria; Solo; Uso da Terra. |
Thesaurus NAL: |
Basal area; Land degradation; Secondary forests. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 03063naa a2200313 a 4500 001 2094415 005 2018-10-01 008 2018 bl uuuu u00u1 u #d 024 7 $a10.1016/j.foreco.2018.08.014$2DOI 100 1 $aVILLA, P. M. 245 $aIntensification of shifting cultivation reduces forest resilience in the northern Amazon.$h[electronic resource] 260 $c2018 520 $aShifting cultivation is a traditional land-use system to ensure livelihood in the Northern Amazon. Here, we evaluated how intensification of shifting cultivation (SC) affects secondary forest recovery in the northern Amazon forest. To measure intensity of shifting cultivation, we used the number of previous SC cycles. We selected three study sites containing second-growth forest (SG) with different stand ages (5 and 10 years) after one, three or six SC cycles. Furthermore, we selected old-growth forest (OG) in each study site. In each selected SG and OG, three plots of 20×50m were established, totalizing 63 plots in the study area. In each plot, all trees, palms and lianas with diameter at breast height≥5 cm were tagged and identified to species level. We analyzed the effects of SC intensification and soil fertility on woody species richness, species composition and basal area using mixed effect models. Species richness and basal area, lower in SG than in OG, increased with regeneration time after abandonment, but reduced with intensification of SC. Community dissimilarities (Bray-Curtis distances) between OG and SG increased with the number of shifting cultivation cycles. Soil fertility differed between SG with different regeneration stages and reduced with number of SC cycles. We found that soil fertility and management intensity, i.e., number of previous SC cycles, explained pattern observed in richness, species composition and basal area equally good. Due to nutrient exports with crops and increasing nutrient leaching, soil fertility is expected to reduce with SC intensity. Therefore, our data indicate that intensification of SC reduces recovery of species richness, composition and basal area of SGs following productive periods. Thus, the intensification of SC reduces the resilience of SGs, turning this ancient form of land-use unsustainable. Environmental sustainability of SC may be achieved by extending fallow periods, limiting the maximum yield. To attend growing demands of indigenous and non-indigenous communities, we propose other alternatives of land-use such as permanent agroforestry systems. 650 $aBasal area 650 $aLand degradation 650 $aSecondary forests 650 $aÁrea Basal 650 $aDeterioração do Solo 650 $aFloresta Secundaria 650 $aSolo 650 $aUso da Terra 700 1 $aMARTINS, S. V. 700 1 $aOLIVEIRA NETO, S. N. de 700 1 $aRODRIGUES, A. C. 700 1 $aMARTORANO, L. G. 700 1 $aMONSANTO, L. D. 700 1 $aCANCIO, N. M. 700 1 $aGASTAUER, M. 773 $tForest Ecology and Management$gv. 430, p. 312-320, 2018.
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