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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Aplicação de índices espectrais na avaliação do aumento da concentração de dióxido de carbono atmosférico em cafeeiro.
Autores:  HAMADA, E.
PONZONI, F. J.
GONÇALVES, R. R. V.
Data:  2016-01-26
Ano:  2015
Palavras-chave:  Cv Obatã
Radiometric
Mudanças climáticas
Radiometria.
Café
Dióxido de carbono
Clima
Coffea Arábica.
Climate change.
Resumo:  Abstract: Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. In addition, recent climate change have had widespread impacts on human and natural system. The morphology and the physiological processes of plants can be altered by increasing the atmospheric carbon dioxide (CO2) concentration. The objective of this study was to evaluate the spectral indexes of individual leaves of coffee cv. Obatã IAC 1669-20 under the effect of increased atmospheric CO2 concentration. Samples of coffee leaves were collected in August and in December 2013, from plants cultivated in the FACE experiment (Free Air CO2 Enrichment), located at Embrapa Environment, Jaguariúna - SP. Seven spectral index were evaluated. The spectral propriety of leaves collected in August detected the effect of CO2 enriched environment by adopting the PSSRa and PSSRb (Pigment Specific Simple Ratio, chlorophyll a and b, respectively) and NDVI (Normalized Difference Vegetation Index), at 1 % of significance. However, the same was not observed in leaves collected in December and the effect of CO2 enriched environment was not significant. Additional studies are been conducted in order to better understanding of the interaction process between the spectral properties of individual leaves and the enriched CO2 concentration environment.
Tipo:  Separatas
Idioma:  Português
Identificador:  In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 17., 2015, João Pessoa. Anais... São José dos Campos: INPE, 2015. p. 2759-2766.

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1035264
Direitos:  openAccess
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