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Registro Completo |
Biblioteca(s): |
Embrapa Roraima. |
Data corrente: |
14/12/2005 |
Data da última atualização: |
29/04/2022 |
Autoria: |
SCHWENGBER, D. R.; OLIVEIRA, J. M. F. de; MOURA NETO, M. A. de. |
Afiliação: |
DALTON ROBERTO SCHWENGBER, CPAF-RR; JANE MARIA FRANCO DE OLIVEIRA, CPAF-RR. |
Título: |
Omissão de nutrientes e corretivos e fosfatagem corretiva na cultura da mandioca em cerrado de Roraima. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Boa Vista: Embrapa Roraima, 2004. |
Páginas: |
4 p. |
Série: |
(Embrapa Roraima. Cumunicado Técnico, 22). |
ISBN: |
0102-099 |
Idioma: |
Português |
Palavras-Chave: |
Correção; Roraima. |
Thesagro: |
Mandioca; Solo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/191913/1/cot02204-omissaoNutrientes-dalton.pdf
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Marc: |
LEADER 00579nam a2200193 a 4500 001 1690955 005 2022-04-29 008 2004 bl uuuu u0uu1 u #d 100 1 $aSCHWENGBER, D. R. 245 $aOmissão de nutrientes e corretivos e fosfatagem corretiva na cultura da mandioca em cerrado de Roraima. 260 $aBoa Vista: Embrapa Roraima$c2004 300 $a4 p. 490 $a(Embrapa Roraima. Cumunicado Técnico, 22). 650 $aMandioca 650 $aSolo 653 $aCorreção 653 $aRoraima 700 1 $aOLIVEIRA, J. M. F. de 700 1 $aMOURA NETO, M. A. de
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Embrapa Roraima (CPAF-RR) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
15/05/2018 |
Data da última atualização: |
22/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
ROWLAND, L.; COSTA, A. C. L. da; OLIVEIRA, A. A. R.; OLIVEIRA, R. S.; BITTENCOURT, P. L.; COSTA, P. B.; GILES, A. L.; SOSA, A. I.; COUGHLIN, I.; GODLEE, J. L.; VASCONCELOS, S. S.; S. JUNIOR, J. A.; FERREIRA, L. V.; MENCUCCINI, M.; MEIR, P. |
Afiliação: |
Lucy Rowland, University of Exeter; Antonio C. L. da Costa, UFPA; Alex A. R. Oliveira, MPEG; Rafael S. Oliveira, UNICAMP; Paulo L. Bittencourt, UNICAMP; Patricia B. Costa, UNICAMP; Andre L. Giles, UNICAMP; Azul I. Sosa, UNICAMP; Ingrid Coughlin, USP; John L. Godlee, University of Edinburgh; STEEL SILVA VASCONCELOS, CPATU; João A. S. Junior, UFPA; Leandro V. Ferreira, MPEG; Maurizio Mencuccini, CREAF / ICREA; Patrick Meir, University of Edinburgh / Australian National University. |
Título: |
Drought stress and tree size determine stem CO2 efflux in a tropical forest. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
New Phytologist, v. 218, n. 4, p. 1393-1405, June 2018. |
DOI: |
10.1111/nph.15024 |
Idioma: |
Inglês |
Conteúdo: |
CO2 efflux from stems (CO2_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. We present a study of tropical forest CO2_stem from 215 trees across wet and dry seasons, at the world?s longest running tropical forest drought experiment site. We show a 27% increase in wet season CO2_stem in the droughted forest relative to a control forest. This was driven by increasing CO2_stem in trees 10?40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees > 20 cm diameter, including large increases in maintenance respiration in the largest droughted trees, > 40 cm diameter. However, we found no clear taxonomic influence on CO2_stem and were unable to accurately predict how drought sensitivity altered ecosystem scale CO2_stem, due to substantial uncertainty introduced by contrasting methods previously employed to scale CO2_stem fluxes. Our findings indicate that under future scenarios of elevated drought, increases in CO2_stem may augment carbon losses, weakening or potentially reversing the tropical forest carbon sink. However, due to substantial uncertainties in scaling CO2_stem fluxes, stand-scale future estimates of changes in stem CO2 emissions remain highly uncertain. |
Palavras-Chave: |
Estresse hídrico. |
Thesagro: |
Carbono; Floresta; Floresta Tropical. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/176915/1/nph.15024.pdf
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Marc: |
LEADER 02323naa a2200349 a 4500 001 2091469 005 2018-05-22 008 2018 bl uuuu u00u1 u #d 024 7 $a10.1111/nph.15024$2DOI 100 1 $aROWLAND, L. 245 $aDrought stress and tree size determine stem CO2 efflux in a tropical forest.$h[electronic resource] 260 $c2018 520 $aCO2 efflux from stems (CO2_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. We present a study of tropical forest CO2_stem from 215 trees across wet and dry seasons, at the world?s longest running tropical forest drought experiment site. We show a 27% increase in wet season CO2_stem in the droughted forest relative to a control forest. This was driven by increasing CO2_stem in trees 10?40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees > 20 cm diameter, including large increases in maintenance respiration in the largest droughted trees, > 40 cm diameter. However, we found no clear taxonomic influence on CO2_stem and were unable to accurately predict how drought sensitivity altered ecosystem scale CO2_stem, due to substantial uncertainty introduced by contrasting methods previously employed to scale CO2_stem fluxes. Our findings indicate that under future scenarios of elevated drought, increases in CO2_stem may augment carbon losses, weakening or potentially reversing the tropical forest carbon sink. However, due to substantial uncertainties in scaling CO2_stem fluxes, stand-scale future estimates of changes in stem CO2 emissions remain highly uncertain. 650 $aCarbono 650 $aFloresta 650 $aFloresta Tropical 653 $aEstresse hídrico 700 1 $aCOSTA, A. C. L. da 700 1 $aOLIVEIRA, A. A. R. 700 1 $aOLIVEIRA, R. S. 700 1 $aBITTENCOURT, P. L. 700 1 $aCOSTA, P. B. 700 1 $aGILES, A. L. 700 1 $aSOSA, A. I. 700 1 $aCOUGHLIN, I. 700 1 $aGODLEE, J. L. 700 1 $aVASCONCELOS, S. S. 700 1 $aS. JUNIOR, J. A. 700 1 $aFERREIRA, L. V. 700 1 $aMENCUCCINI, M. 700 1 $aMEIR, P. 773 $tNew Phytologist$gv. 218, n. 4, p. 1393-1405, June 2018.
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