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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: |
24/03/2011 |
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Data da última atualização: |
06/04/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIMA, T. T. S.; MIRANDA, I. S.; VASCONCELOS, S. S. |
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Afiliação: |
TÂMARA THAIZ SANTANA LIMA, UFRA; IZILDINHA SOUZA MIRANDA, UFRA; STEEL SILVA VASCONCELOS, CPATU. |
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Título: |
Effects of water and nutrient availability on fine root growth in eastern Amazonian forest regrowth, Brazil. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
New Phytologist, v. 187, p. 622-630, 2010. |
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DOI: |
10.1111/j.1469-8137.2010.03299.x |
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Idioma: |
Inglês |
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Conteúdo: |
Fine root dynamics is widely recognized as an important biogeochemical process, but there are few data on ?ne root growth and its response to soil resource availability, especially for tropical forests. We evaluated the response of ?ne root dynamics to altered availability of soil water and nutrients in a 20-yr-old forest regrowth in eastern Amazonia. In one experiment the dry season reduction in soil moisture was alleviated by irrigation. In the other experiment, nutrient supply was reduced by litter removal. We used the ingrowth core technique to measure ?ne root mass growth, length growth, mortality and speci?c root length. Dry-season irrigation had no signi?cant effect on mass and length of live and dead roots, whereas litter removal reduced mass and length of live roots. For both irrigation and litter removal experiments, root growth was signi?cantly greater in the dry season than in the wet season. Increased root growth was associated with decreased soil water availability. However, root growth did not increase in response to nutrient reduction in litter removal plots. Overall, our results suggest that belowground allocation may differ according to the type of soil resource limitation. |
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Thesagro: |
Água; Biomassa; Chuva; Floresta; Irrigação; Raiz; Seca; Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01890naa a2200253 a 4500
001 1882820
005 2015-04-06
008 2010 bl --- 0-- u #d
024 7 $a10.1111/j.1469-8137.2010.03299.x$2DOI
100 1 $aLIMA, T. T. S.
245 $aEffects of water and nutrient availability on fine root growth in eastern Amazonian forest regrowth, Brazil.
260 $c2010
520 $aFine root dynamics is widely recognized as an important biogeochemical process, but there are few data on ?ne root growth and its response to soil resource availability, especially for tropical forests. We evaluated the response of ?ne root dynamics to altered availability of soil water and nutrients in a 20-yr-old forest regrowth in eastern Amazonia. In one experiment the dry season reduction in soil moisture was alleviated by irrigation. In the other experiment, nutrient supply was reduced by litter removal. We used the ingrowth core technique to measure ?ne root mass growth, length growth, mortality and speci?c root length. Dry-season irrigation had no signi?cant effect on mass and length of live and dead roots, whereas litter removal reduced mass and length of live roots. For both irrigation and litter removal experiments, root growth was signi?cantly greater in the dry season than in the wet season. Increased root growth was associated with decreased soil water availability. However, root growth did not increase in response to nutrient reduction in litter removal plots. Overall, our results suggest that belowground allocation may differ according to the type of soil resource limitation.
650 $aÁgua
650 $aBiomassa
650 $aChuva
650 $aFloresta
650 $aIrrigação
650 $aRaiz
650 $aSeca
650 $aSolo
700 1 $aMIRANDA, I. S.
700 1 $aVASCONCELOS, S. S.
773 $tNew Phytologist$gv. 187, p. 622-630, 2010.
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| Registros recuperados : 161 | |
| 6. |  | GLORIA, G. C. P.; AMADOR, J. T.; VASCONCELOS, S. S. Distribuição da biomassa de raízes em plantio de híbrido interespecifíco de palma de óleo. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA, 20.; SEMINÁRIO DE PÓS-GRADUAÇÃO DA EMBRAPA AMAZÔNIA ORIENTAL, 4., 2016, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2016. p. 420-424.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 11. | | BLANCHER, T.; VASCONCELOS, S. S.; CAPELA, C.; KATO, O. R. Produção de serapilheira em sistemas agroflorestais em Tomé-Açu, Amazônia Oriental. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 8., 2011, Belém, PA. Anais... Belém, PA: SBSAF: Embrapa Amazônia Oriental: UFRA: CEPLAC: EMATER: ICRAF, 2011. 1 CD-ROPM. Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 17. | | VASCONCELOS, S. S.; ZARIN, D. J.; ARAÚJO, M. M.; MIRANDA, I. de S. Aboveground net primary productivity in tropical forest regrowth increases following wetter dry-seasons. In: REUNIÃO ANUAL DA SBPC, 59., 2007, Belém, PA. Resumos... Belém, PA: SBPC, [2007].| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 20. | | AMADOR, J. T.; GLORIA, G. C. P.; OLIVEIRA, K. E. H. de; VASCONCELOS, S. S. Aplicabilidade do software Safira 1.1 como ferramenta para a determinação de comprimento de raízes de palma de óleo. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA, 20.; SEMINÁRIO DE PÓS-GRADUAÇÃO DA EMBRAPA AMAZÔNIA ORIENTAL, 4., 2016, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2016. p. 258-261.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 161 | |
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