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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
10/12/2004 |
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Data da última atualização: |
28/10/2009 |
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Autoria: |
REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M. |
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Título: |
Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2003. |
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Páginas: |
52 p. |
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Série: |
(Embrapa Cerrados. Documentos, 81). |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 10(elevado a 3) - 10 (elevado a 7) cells. g. of roots. In the samples of the Cerrado ecosystem, the collect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospirillum spp. associated to its roots. MenosABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazon... Mostrar Tudo |
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Palavras-Chave: |
Degredação. |
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Thesagro: |
Bactéria; Brachiaria; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem. |
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Thesaurus Nal: |
Azospirillum amazonense; degradation; microbiology; nitrogen fixation; pastures; soil. |
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Categoria do assunto: |
-- |
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URL: |
https://www.infoteca.cnptia.embrapa.br/infoteca/bitstream/doc/567997/1/doc81.pdf
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Marc: |
LEADER 02982nam a2200313 a 4500
001 1567997
005 2009-10-28
008 2003 bl uuuu 00u1 u #d
100 1 $aREIS JÚNIOR, F. B. dos
245 $aAssociação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria.
260 $aPlanaltina, DF: Embrapa Cerrados$c2003
300 $a52 p.
490 $a(Embrapa Cerrados. Documentos, 81).
520 $aABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospirillum genus. The associations between these microrganisms and the plants are generally conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective efffect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospirillum genus associated with the roots of these plants. Different pastures (B.humidicola, B. decumbens and B. brizantha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The collects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and qualification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasiliense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 10(elevado a 3) - 10 (elevado a 7) cells. g. of roots. In the samples of the Cerrado ecosystem, the collect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospirillum spp. associated to its roots.
650 $aAzospirillum amazonense
650 $adegradation
650 $amicrobiology
650 $anitrogen fixation
650 $apastures
650 $asoil
650 $aBactéria
650 $aBrachiaria
650 $aFixação de Nitrogênio
650 $aMicrobiologia do Solo
650 $aPastagem
653 $aDegredação
700 1 $aTEIXEIRA, K. R. dos S.
700 1 $aURQUIAGA, S.
700 1 $aREIS, V. M.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
25/03/2020 |
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Data da última atualização: |
25/03/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
MONTIBELLER, B.; SANCHES, I. D.; LUIZ, A. J. B.; GONÇALVES, F.; AGUIAR, D. A. de. |
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Afiliação: |
BRUNO MONTIBELLER, University of Tartu; IEDA DEL'ARCO SANCHES, INPE; ALFREDO JOSE BARRETO LUIZ, CNPMA; FABIO GONÇALVES, Canopy Remote Sensing Solutions; DANIEL ALVES DE AGUIAR, Agrosatélite Geotecnologia Aplicada. |
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Título: |
Spectral-temporal profile analysis of maize, soybean and sugarcane based on OLI/Landsat-8 data. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Brazilian Journal of Agriculture, Piracicaba, v. 94, n. 3, p. 242-258, 2019. |
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ISSN: |
2318-2407 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Remote sensing (RS) technology is a viable complementary alternative to current agriculture surveying methods. RS data spectral information is the main variable used for several purposes, such as crop type identification. However, different management practices (MP) adopted in crop cultivation may alter its spectral characteristics. The objective of this work is to analyze the spectral-temporal profile (STP) variation of soybean, maize and sugarcane cultivated under different MP. We used time series of the six spectral bands of the OLI/Landsat-8 sensor and of two vegetation indexes (VI) to investigate the intraspecific variation (same crop specie) and the interspecific variation (different crop species). We applied hierarchical cluster analyses to determine the crop´s STP variation. The bands results were more efficient than the VI. This shows that despite the widely use of VI, better results are retrieved when using the bands STP, which also allows differentiating and analyzing crops cultivated under different MP. k-- Resumo: Dados de sensoriamento remoto são uma alternativa complementar aos métodos atuais de levantamento agrícola. A informação espectral dos dados de sensoriamento remoto é a principal variável utilizada para diversos propósitos como, por exemplo, a identificação do tipo de cultura. Porém, diferentes métodos de manejo (MM) adotados durante o cultivo podem alterar as características espectrais das culturas. Assim, o objetivo deste trabalho é analisar a variação do perfil espectro-temporal (PET) da soja, do milho e da cana-de-açúcar cultivadas com diferentes MM. Séries temporais de seis bandas espectrais do sensor OLI/Landsat-8 e dois índices de vegetação (IV) foram utilizados para analisar as variações intraespecíficas (mesma cultura) e interespecíficas (diferentes culturas). Para determinar as variações entre os PET das culturas, foi utilizado análises hierárquicas de clusters. Os resultados das análises baseadas nas bandas foram mais eficientes dos que as baseadas nos IV, apesar do amplo uso destes últimos. MenosAbstract: Remote sensing (RS) technology is a viable complementary alternative to current agriculture surveying methods. RS data spectral information is the main variable used for several purposes, such as crop type identification. However, different management practices (MP) adopted in crop cultivation may alter its spectral characteristics. The objective of this work is to analyze the spectral-temporal profile (STP) variation of soybean, maize and sugarcane cultivated under different MP. We used time series of the six spectral bands of the OLI/Landsat-8 sensor and of two vegetation indexes (VI) to investigate the intraspecific variation (same crop specie) and the interspecific variation (different crop species). We applied hierarchical cluster analyses to determine the crop´s STP variation. The bands results were more efficient than the VI. This shows that despite the widely use of VI, better results are retrieved when using the bands STP, which also allows differentiating and analyzing crops cultivated under different MP. k-- Resumo: Dados de sensoriamento remoto são uma alternativa complementar aos métodos atuais de levantamento agrícola. A informação espectral dos dados de sensoriamento remoto é a principal variável utilizada para diversos propósitos como, por exemplo, a identificação do tipo de cultura. Porém, diferentes métodos de manejo (MM) adotados durante o cultivo podem alterar as características espectrais das culturas. Assim, o objetivo deste trabalho é analisa... Mostrar Tudo |
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Palavras-Chave: |
Agricultural dynamics; Análise de clusters; Dinâmica agrícola; Índices de vegetação; Variação interespecífica; Variação intraespecífica. |
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Thesagro: |
Cana de Açúcar; Levantamento; Milho; Sensoriamento Remoto; Soja. |
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Thesaurus NAL: |
Cluster analysis; Interspecific variation; Intraspecific variation; Remote sensing; Vegetation index. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1121366/1/Luizspectraltemporal2019.pdf
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Marc: |
LEADER 03233naa a2200373 a 4500
001 2121366
005 2020-03-25
008 2019 bl uuuu u00u1 u #d
022 $a2318-2407
100 1 $aMONTIBELLER, B.
245 $aSpectral-temporal profile analysis of maize, soybean and sugarcane based on OLI/Landsat-8 data.$h[electronic resource]
260 $c2019
520 $aAbstract: Remote sensing (RS) technology is a viable complementary alternative to current agriculture surveying methods. RS data spectral information is the main variable used for several purposes, such as crop type identification. However, different management practices (MP) adopted in crop cultivation may alter its spectral characteristics. The objective of this work is to analyze the spectral-temporal profile (STP) variation of soybean, maize and sugarcane cultivated under different MP. We used time series of the six spectral bands of the OLI/Landsat-8 sensor and of two vegetation indexes (VI) to investigate the intraspecific variation (same crop specie) and the interspecific variation (different crop species). We applied hierarchical cluster analyses to determine the crop´s STP variation. The bands results were more efficient than the VI. This shows that despite the widely use of VI, better results are retrieved when using the bands STP, which also allows differentiating and analyzing crops cultivated under different MP. k-- Resumo: Dados de sensoriamento remoto são uma alternativa complementar aos métodos atuais de levantamento agrícola. A informação espectral dos dados de sensoriamento remoto é a principal variável utilizada para diversos propósitos como, por exemplo, a identificação do tipo de cultura. Porém, diferentes métodos de manejo (MM) adotados durante o cultivo podem alterar as características espectrais das culturas. Assim, o objetivo deste trabalho é analisar a variação do perfil espectro-temporal (PET) da soja, do milho e da cana-de-açúcar cultivadas com diferentes MM. Séries temporais de seis bandas espectrais do sensor OLI/Landsat-8 e dois índices de vegetação (IV) foram utilizados para analisar as variações intraespecíficas (mesma cultura) e interespecíficas (diferentes culturas). Para determinar as variações entre os PET das culturas, foi utilizado análises hierárquicas de clusters. Os resultados das análises baseadas nas bandas foram mais eficientes dos que as baseadas nos IV, apesar do amplo uso destes últimos.
650 $aCluster analysis
650 $aInterspecific variation
650 $aIntraspecific variation
650 $aRemote sensing
650 $aVegetation index
650 $aCana de Açúcar
650 $aLevantamento
650 $aMilho
650 $aSensoriamento Remoto
650 $aSoja
653 $aAgricultural dynamics
653 $aAnálise de clusters
653 $aDinâmica agrícola
653 $aÍndices de vegetação
653 $aVariação interespecífica
653 $aVariação intraespecífica
700 1 $aSANCHES, I. D.
700 1 $aLUIZ, A. J. B.
700 1 $aGONÇALVES, F.
700 1 $aAGUIAR, D. A. de
773 $tBrazilian Journal of Agriculture, Piracicaba$gv. 94, n. 3, p. 242-258, 2019.
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Embrapa Meio Ambiente (CNPMA) |
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