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Title: Impactos do avanço da soja no balanço de radiação no leste da Amazônia
Other Titles: Impacts of soybean expansion on radiation balance in eastern Amazon
metadata.dc.creator: SOUZA, Paulo Jorge de Oliveira Ponte de
ROCHA, Edson José Paulino da
RIBEIRO, Aristides
Keywords: Soja
Mudanças climáticas
Mudanças de uso da terra
Climate change
Land use changes
Issue Date: Jun-2013
Publisher: Instituto Nacional de Pesquisas da Amazônia
Citation: SOUZA, Paulo Jorge de Oliveira Ponte de; ROCHA, Edson José Paulino da; RIBEIRO, Aristides. Impactos do avanço da soja no balanço de radiação no leste da Amazônia. Acta Amazonica, Manaus, v. 43, n. 2, p. 169-178, jun. 2013. DOI: Disponível em: Acesso em:.
Abstract: The deforestation of the Amazon, especially for pasture use, has been explored by several researchers who have pointed out as a consequence, serious environmental problems. The continuous expansion of agriculture on areas of cattle ranching in the Amazon, as well as on native areas, must be seen with caution since few studies have been conducted in order to investigate which probable environmental impacts can be generated due to the presence of soybean monoculture in the region. This study evaluates the local impacts of the replacement of forest by soybean (Glycine max (L.) Merrill) on radiation balance components in an area that represents the agricultural border advancement in Amazonia. A micrometeorological experiment was installed in an area of soybean cultivation in Paragominas-PA and data from forest ecosystems were collected in Caxiuanã forests located in Melgaço-PA both during 2006 and 2007. During the soybean growing season the mean impact found in net radiation represented a reduction of 17.9% of the value commonly observed in the forest. During the off-season the impact on net radiation was 15.5%. Principal mechanisms that control these impacts were associated with the high soybean albedo and high loss of long wave radiation. Although the greatest impact occurs during the crop growing season, the time of occurrence of this negative effect is restricted to only 1/3 of the year, which leads to a higher impact of the off-season on energy balance in cumulative terms.
ISSN: 1809-4392
Appears in Collections:Artigos Científicos - FAMET/IG

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