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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
08/04/2015 |
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Data da última atualização: |
08/04/2015 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
OLIVEIRA, L. D. da S.; MOURA, M. S. B. de; SOUZA, L. S. B. de; RODRIGUES, G. D. da S. |
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Afiliação: |
LEIDE DAYANE DA SILVA OLIVEIRA, Bolsista PIBIC/CNPq da Embrapa Semiárido; MAGNA SOELMA BESERRA DE MOURA, CPATSA; LUCIANA SANDRA BASTOS DE SOUZA, Doutoranda do Departamento de Engenharia Agrícola, Universidade Federal de Viçosa; GILSON DENNYS DA SILVA RODRIGUES, Bolsista INPE da Embrapa Semiárido. |
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Título: |
Albedo da cana-de-açúcar cv. VAT 90-212 irrigada no Submédio do Vale do Rio São Francisco. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 9., 2014, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2014. |
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Páginas: |
p. 43-48. |
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Série: |
(Embrapa Semiárido. Documentos, 261). |
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Idioma: |
Português |
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Conteúdo: |
O albedo de uma superfície vegetada varia dependendo da altura das plantas, da fase fenológica, da cobertura do solo, do ângulo das folhas, do índice de área foliar, do ângulo zenital, bem como da quantidade e do tipo de nuvens. O objetivo deste trabalho foi determinar a sazonalidade do albedo de um canavial irrigado por gotejamento subsuperficial no Submédio do Vale São Francisco. Para tanto, foi conduzido um experimento em uma área de cana-de-açúcar (Saccharum spp.) plantada com a cv. VAT 90-212, irrigada por gotejamento subsuperficial, pertencente à empresa Agrovale, no Município de Juazeiro, BA. Para a determinação do albedo, foi instalado, no topo de uma torre micrometeorológica, um saldo radiômetro composto por quatro sensores de radiação, direcionados para o Norte, distante 2,0 metros da torre. O albedo foi determinado, em base diária, para o ciclo de cana-planta de 2013-2014. Constatou-se que durante o ciclo da cana-de-açúcar, o albedo da cv. VAT 90-212 variou entre 13% e 25% (fase de máximo crescimento), com valores médios em torno de 21%. A sazonalidade dos valores do albedo da cana-de-açúcar indica a interação da radiação com as condições da superfície, principalmente no que se refere ao fator de cobertura do solo e indice de área foliar. |
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Palavras-Chave: |
Albedo; Balanço de radiação; Cana-de-açúcar; Coeficiente de reflectância. |
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Thesagro: |
Irrigação. |
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Thesaurus Nal: |
Saccharum; Sugarcane. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/121953/1/Resumo-05.pdf
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Marc: |
LEADER 02168nam a2200253 a 4500
001 2012968
005 2015-04-08
008 2014 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. D. da S.
245 $aAlbedo da cana-de-açúcar cv. VAT 90-212 irrigada no Submédio do Vale do Rio São Francisco.$h[electronic resource]
260 $aIn: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 9., 2014, Petrolina. Anais... Petrolina: Embrapa Semiárido$c2014
300 $ap. 43-48.
490 $a(Embrapa Semiárido. Documentos, 261).
520 $aO albedo de uma superfície vegetada varia dependendo da altura das plantas, da fase fenológica, da cobertura do solo, do ângulo das folhas, do índice de área foliar, do ângulo zenital, bem como da quantidade e do tipo de nuvens. O objetivo deste trabalho foi determinar a sazonalidade do albedo de um canavial irrigado por gotejamento subsuperficial no Submédio do Vale São Francisco. Para tanto, foi conduzido um experimento em uma área de cana-de-açúcar (Saccharum spp.) plantada com a cv. VAT 90-212, irrigada por gotejamento subsuperficial, pertencente à empresa Agrovale, no Município de Juazeiro, BA. Para a determinação do albedo, foi instalado, no topo de uma torre micrometeorológica, um saldo radiômetro composto por quatro sensores de radiação, direcionados para o Norte, distante 2,0 metros da torre. O albedo foi determinado, em base diária, para o ciclo de cana-planta de 2013-2014. Constatou-se que durante o ciclo da cana-de-açúcar, o albedo da cv. VAT 90-212 variou entre 13% e 25% (fase de máximo crescimento), com valores médios em torno de 21%. A sazonalidade dos valores do albedo da cana-de-açúcar indica a interação da radiação com as condições da superfície, principalmente no que se refere ao fator de cobertura do solo e indice de área foliar.
650 $aSaccharum
650 $aSugarcane
650 $aIrrigação
653 $aAlbedo
653 $aBalanço de radiação
653 $aCana-de-açúcar
653 $aCoeficiente de reflectância
700 1 $aMOURA, M. S. B. de
700 1 $aSOUZA, L. S. B. de
700 1 $aRODRIGUES, G. D. da S.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
25/09/2008 |
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Data da última atualização: |
25/09/2008 |
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Autoria: |
JIMÉNEZ, J. -J.; DECAENS, T. |
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Título: |
Species co-occurrence and spatial pattern of earthworm community related to soil heterogeneity in a Neotropical gallery forest. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Competitive interactions and environmental factors act as filters and both determine community
assembly at different scales. The description of species co-occurrence patterns through relevant
null-model analysis has been seldom addressed for soil animals in the scientific literature. In
this study, we assessed the spatial distributional features of an earthworm community and
selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical
tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis,
and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia
analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale
by occupying different areas of varying physico-chemical properties, and ii) the species
co-occurrence pattern is not structured by competition.
At the local scale of our study (tens of meters) earthworm species co-occurred more frequently
than expected by chance (EBC), and the C-score was significantly different to the observed
value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence
of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged
from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern
of the spatial distribution of species. A significant species association and dissociation was
observed for different pair of species.
The Co-Inertia analysis showed the correlation between earthworms and soil variables, and the
Partial Mantel test revealed which soil variable was significantly linked to the spatial distribution
of species, which seemed to be species-specific. Compared to other studies conducted in the
area, and where a clear opposite spatial pattern was detected for two species, there was no
significant spatial exclusion in the gallery forest. This might be an indication of no resource use
limitation in this ecosystem, although this hypothesis needs to be tested further. In conclusion
the earthworm community of the gallery forest was not structured by interspecific competition,
although species showed a patchy distribution in space. MenosCompetitive interactions and environmental factors act as filters and both determine community
assembly at different scales. The description of species co-occurrence patterns through relevant
null-model analysis has been seldom addressed for soil animals in the scientific literature. In
this study, we assessed the spatial distributional features of an earthworm community and
selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical
tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis,
and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia
analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale
by occupying different areas of varying physico-chemical properties, and ii) the species
co-occurrence pattern is not structured by competition.
At the local scale of our study (tens of meters) earthworm species co-occurred more frequently
than expected by chance (EBC), and the C-score was significantly different to the observed
value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence
of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged
from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern
of the spatial distribution of species. A significant species association and dissociation was
observed for different pair of s... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02932naa a2200133 a 4500
001 1314945
005 2008-09-25
008 2008 bl uuuu u00u1 u #d
100 1 $aJIMÉNEZ, J. -J.
245 $aSpecies co-occurrence and spatial pattern of earthworm community related to soil heterogeneity in a Neotropical gallery forest.
260 $c2008
520 $aCompetitive interactions and environmental factors act as filters and both determine community assembly at different scales. The description of species co-occurrence patterns through relevant null-model analysis has been seldom addressed for soil animals in the scientific literature. In this study, we assessed the spatial distributional features of an earthworm community and selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis, and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale by occupying different areas of varying physico-chemical properties, and ii) the species co-occurrence pattern is not structured by competition. At the local scale of our study (tens of meters) earthworm species co-occurred more frequently than expected by chance (EBC), and the C-score was significantly different to the observed value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern of the spatial distribution of species. A significant species association and dissociation was observed for different pair of species. The Co-Inertia analysis showed the correlation between earthworms and soil variables, and the Partial Mantel test revealed which soil variable was significantly linked to the spatial distribution of species, which seemed to be species-specific. Compared to other studies conducted in the area, and where a clear opposite spatial pattern was detected for two species, there was no significant spatial exclusion in the gallery forest. This might be an indication of no resource use limitation in this ecosystem, although this hypothesis needs to be tested further. In conclusion the earthworm community of the gallery forest was not structured by interspecific competition, although species showed a patchy distribution in space.
700 1 $aDECAENS, T.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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