| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Corte. |
|
Data corrente: |
11/01/2000 |
|
Data da última atualização: |
15/01/2014 |
|
Autoria: |
CARVALHO, M. M. de. |
|
Título: |
A comparative study of the responses of six stylosanthes species toacid soil factors with particular reference to aluminium. |
|
Ano de publicação: |
1978 |
|
Fonte/Imprenta: |
Queensland: University of Queensland, 1978. |
|
Páginas: |
298p. |
|
Idioma: |
Português |
|
Notas: |
Tese Doutorado. |
|
Conteúdo: |
The present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was shown to be due to the greater... MenosThe present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was s... Mostrar Tudo |
|
Palavras-Chave: |
Aluminium; Fertilizacao; Fertilization. |
|
Thesagro: |
Agronomia; Solo. |
|
Thesaurus Nal: |
agronomy; soil; Stylosanthes. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02166nam a2200229 a 4500
001 1322209
005 2014-01-15
008 1978 bl uuuu m 00u1 u #d
100 1 $aCARVALHO, M. M. de
245 $aA comparative study of the responses of six stylosanthes species toacid soil factors with particular reference to aluminium.
260 $aQueensland: University of Queensland$c1978
300 $a298p.
500 $aTese Doutorado.
520 $aThe present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was shown to be due to the greater...
650 $aagronomy
650 $asoil
650 $aStylosanthes
650 $aAgronomia
650 $aSolo
653 $aAluminium
653 $aFertilizacao
653 $aFertilization
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Corte (CNPGC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agricultura Digital. |
|
Data corrente: |
11/01/2021 |
|
Data da última atualização: |
14/08/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
BETTOLLI, M. L.; SOLMAN, S. A.; ROCHA, R. P. da; LLOPART, M.; GUTIERREZ, J. M.; FERNÁNDEZ, J.; OLMO, M. E.; LAVIN GULLON, A.; CHOU, S. C.; RODRIGUES, D. C.; COPPOLA, E.; HUARTE, R. B.; BARREIRO, M.; BLÁZQUEZ, J.; DOYLE, M.; FEIJOÓ, M.; HUTH, R.; MACHADO, L.; CUADRA, S. V. |
|
Afiliação: |
University of Buenos Aires (UBA); CONICET; Institut Franco-Argentin d'Estudes sur le Climat et ses Impacts (UMI-IFAECI/CNRS-CONICET-UBA); UBA; UMI-IFAECI/CNRS-CONICET-UBA; Centro de Investigaciones del Mar y La Atmósfera (CIMA), CONICET-UBA; USP; Unesp; Universidad de Cantabria; Universidad de Cantabria; UBA; CONICET; UMI-IFAECI/CNRS-CONICET-UBA; Universidad de Cantabria; INPE; INPE; International Center for Theoretical Physics, Trieste; UBA; CONICET; UMI-IFAECI/CNRS-CONICET-UBA; Universidad de la República, Montevideo; UMI-IFAECI/CNRS-CONICET-UBA; CIMA/CONICET-UBA; Universidad Nacional de La Plata; UBA; UMI-IFAECI/CNRS-CONICET-UBA; CIMA/CONICET-UBA; UMI-IFAECI/CNRS-CONICET-UBA; CIMA/CONICET-UBA; Academy of Sciences of the Czech Republic; Charles University; INPE; SANTIAGO VIANNA CUADRA, CNPTIA. |
|
Título: |
The CORDEX Flagship Pilot Study in southeastern South America: a comparative study of statistical and dynamical downscaling models in simulating daily extreme precipitation events. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Climate Dynamics, v. 56, n. 5-6, p. 1589-1608, Mar. 2021. |
|
DOI: |
https://doi.org/10.1007/s00382-020-05549-z |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract. The aim of this work is to present preliminary results of the statistical and dynamical simulations carried out within the framework of the Flagship Pilot Study in southeastern South America (FPS-SESA) endorsed by the Coordinated Regional Climate Downscaling Experiments (CORDEX) program. The FPS-SESA initiative seeks to promote inter-institutional collaboration and further networking with focus on extreme rainfall events. The main scientific aim is to study multi-scale processes and interactions most conducive to extreme precipitation events through both statistical and dynamical downscal-ing techniques, including convection-permitting simulations. To this end, a targeted experiment was designed considering the season October 2009 to March 2010, a period with a record number of extreme precipitation events within SESA. Also, three individual extreme events within that season were chosen as case studies for analyzing specific regional processes and sensitivity to resolutions. Four dynamical and four statistical downscaling models (RCM and ESD respectively) from different institutions contributed to the experiment. In this work, an analysis of the capability of the set of the FPS-SESA downscaling methods in simulating daily precipitation during the selected warm season is presented together with an inte-grated assessment of multiple sources of observations and available CORDEX Regional Climate Model simulations. Com-parisons among all simulations reveal that there is no single model that performs best in all aspects evaluated. The ability in reproducing the different features of daily precipitation depends on the model. However, the evaluation of the sequence of precipitation events, their intensity and timing suggests that FPS-SESA simulations based on both RCM and ESD yield promising results. Most models capture the extreme events selected, although with a considerable spread in accumulated values and the location of heavy precipitation. MenosAbstract. The aim of this work is to present preliminary results of the statistical and dynamical simulations carried out within the framework of the Flagship Pilot Study in southeastern South America (FPS-SESA) endorsed by the Coordinated Regional Climate Downscaling Experiments (CORDEX) program. The FPS-SESA initiative seeks to promote inter-institutional collaboration and further networking with focus on extreme rainfall events. The main scientific aim is to study multi-scale processes and interactions most conducive to extreme precipitation events through both statistical and dynamical downscal-ing techniques, including convection-permitting simulations. To this end, a targeted experiment was designed considering the season October 2009 to March 2010, a period with a record number of extreme precipitation events within SESA. Also, three individual extreme events within that season were chosen as case studies for analyzing specific regional processes and sensitivity to resolutions. Four dynamical and four statistical downscaling models (RCM and ESD respectively) from different institutions contributed to the experiment. In this work, an analysis of the capability of the set of the FPS-SESA downscaling methods in simulating daily precipitation during the selected warm season is presented together with an inte-grated assessment of multiple sources of observations and available CORDEX Regional Climate Model simulations. Com-parisons among all simulations reveal that there is... Mostrar Tudo |
|
Palavras-Chave: |
Coordinated Regional Climate Downscaling Experiments; Eventos extremos de precipitação; Extreme precipitation; Observational uncertainty; Precipitação extrema; Simulação dinâmica; Simulação estatística; Southeastern South America; Statistical and dynamical downscaling. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03476naa a2200457 a 4500
001 2129164
005 2023-08-14
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s00382-020-05549-z$2DOI
100 1 $aBETTOLLI, M. L.
245 $aThe CORDEX Flagship Pilot Study in southeastern South America$ba comparative study of statistical and dynamical downscaling models in simulating daily extreme precipitation events.$h[electronic resource]
260 $c2021
520 $aAbstract. The aim of this work is to present preliminary results of the statistical and dynamical simulations carried out within the framework of the Flagship Pilot Study in southeastern South America (FPS-SESA) endorsed by the Coordinated Regional Climate Downscaling Experiments (CORDEX) program. The FPS-SESA initiative seeks to promote inter-institutional collaboration and further networking with focus on extreme rainfall events. The main scientific aim is to study multi-scale processes and interactions most conducive to extreme precipitation events through both statistical and dynamical downscal-ing techniques, including convection-permitting simulations. To this end, a targeted experiment was designed considering the season October 2009 to March 2010, a period with a record number of extreme precipitation events within SESA. Also, three individual extreme events within that season were chosen as case studies for analyzing specific regional processes and sensitivity to resolutions. Four dynamical and four statistical downscaling models (RCM and ESD respectively) from different institutions contributed to the experiment. In this work, an analysis of the capability of the set of the FPS-SESA downscaling methods in simulating daily precipitation during the selected warm season is presented together with an inte-grated assessment of multiple sources of observations and available CORDEX Regional Climate Model simulations. Com-parisons among all simulations reveal that there is no single model that performs best in all aspects evaluated. The ability in reproducing the different features of daily precipitation depends on the model. However, the evaluation of the sequence of precipitation events, their intensity and timing suggests that FPS-SESA simulations based on both RCM and ESD yield promising results. Most models capture the extreme events selected, although with a considerable spread in accumulated values and the location of heavy precipitation.
653 $aCoordinated Regional Climate Downscaling Experiments
653 $aEventos extremos de precipitação
653 $aExtreme precipitation
653 $aObservational uncertainty
653 $aPrecipitação extrema
653 $aSimulação dinâmica
653 $aSimulação estatística
653 $aSoutheastern South America
653 $aStatistical and dynamical downscaling
700 1 $aSOLMAN, S. A.
700 1 $aROCHA, R. P. da
700 1 $aLLOPART, M.
700 1 $aGUTIERREZ, J. M.
700 1 $aFERNÁNDEZ, J.
700 1 $aOLMO, M. E.
700 1 $aLAVIN GULLON, A.
700 1 $aCHOU, S. C.
700 1 $aRODRIGUES, D. C.
700 1 $aCOPPOLA, E.
700 1 $aHUARTE, R. B.
700 1 $aBARREIRO, M.
700 1 $aBLÁZQUEZ, J.
700 1 $aDOYLE, M.
700 1 $aFEIJOÓ, M.
700 1 $aHUTH, R.
700 1 $aMACHADO, L.
700 1 $aCUADRA, S. V.
773 $tClimate Dynamics$gv. 56, n. 5-6, p. 1589-1608, Mar. 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
