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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: |
11/11/2022 |
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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 01913naa a2200253 a 4500
001 1882820
005 2022-11-11
008 2010 bl uuuu u00u1 u #d
024 7 $a10.1111/j.1469-8137.2010.03299.x$2DOI
100 1 $aLIMA, T. T. S.
245 $aEffects of water and nutrient availability on fine root growth in eastern Amazonian forest regrowth, Brazil.$h[electronic resource]
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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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
25/01/2017 |
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Data da última atualização: |
25/01/2017 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
SCHMIDT, G. S. |
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Afiliação: |
GILBERTO SILBER SCHMIDT, CNPSA. |
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Título: |
Razões para as empresas avícolas não utilizarem hormônios. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Revista Em Foco, Concórdia, ed. 75, ano 5, p. 14-15, 2016. |
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Idioma: |
Português |
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Palavras-Chave: |
Hormone. |
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Thesagro: |
Avicultura; Hormônio; Indústria agrícola; Produção animal. |
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Thesaurus NAL: |
Agricultural industry; Poultry production. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00558nam a2200181 a 4500
001 2061706
005 2017-01-25
008 2016 bl uuuu u00u1 u #d
100 1 $aSCHMIDT, G. S.
245 $aRazões para as empresas avícolas não utilizarem hormônios.$h[electronic resource]
260 $aRevista Em Foco, Concórdia, ed. 75, ano 5, p. 14-15, 2016.$c2016
650 $aAgricultural industry
650 $aPoultry production
650 $aAvicultura
650 $aHormônio
650 $aIndústria agrícola
650 $aProdução animal
653 $aHormone
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