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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Solar radiation use efficiency by soybean under field conditions in the amazon region.
Autores:  SOUZA, P. J. de O. P. de
RIBEIRO, A.
ROCHA, E. J. P. da
FARIAS, J. R. B.
LOUREIRO, R. S.
BISPO, C. C.
SAMPAIO, L.
Data:  2010-01-05
Ano:  2009
Palavras-chave:  Interceptação da radiação
Radiation interception
Região amazônica
Índice de área foliar
Soja
Glycine max
Fisiologia vegetal
Área foliar
Radiação solar
Soybean
Glycine max
Radiation use efficiency
Plant physiology
Leaf area index
Amazonia
Resumo:  Abstract The objective of this work was to evaluate the ef? ciency of soybean (Glycine max) in intercepting and using solar radiation under natural ? eld conditions, in the Amazon region, Brazil. The meteorological data and the values of soybean growth and leaf area were obtained from an agrometeorological experiment carried out in Paragominas, Pará state, during 2007 and 2008. The radiation use ef? ciency (RUE) was obtained from the ratio between the above-ground biomass production and the intercepted photosynthetically active radiation (PAR) accumulated to 99 and 95 days after sowing, in 2007 and 2008, respectively. Climatic conditions during the experiment were very distinct, with reduction in rainfall in 2007, which began during the soybean mid-cycle, due to the El Niño phenomenon. An important reduction in the leaf area index and biomass production was observed during 2007. Under natural ? eld conditions in the Amazon region, the values of RUE were 1.46 and 1.99 g MJ-1 PAR in the 2007 and 2008 experiments, respectively. The probable reason for the differences found between these years might be associated to the water restriction in 2007 coupled with the higher air temperature and vapor pressure de? cit, and also to the increase in the fraction of diffuse radiation that reached the land surface in 2008. Index terms: Glycine max, Amazon region, leaf area index, radiation interception.

2009
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  30201

http://www.alice.cnptia.embrapa.br/handle/doc/579467

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/79100/1/ID-30201.pdf
Editor:  Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 10, p. 1211-1218, out. 2009.
Relação:  Embrapa Soja - Artigo em periódico indexado (ALICE)
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