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	Provedor de dados Anais da ABC (AABC) (1) Scientia Agricola (1) Autor Gomes,Francisco Sérgio (1) Oliveira,Luiz Felipe Ramalho de (1) Oliveira,Marcio Leles Romarco de (1) Ponzoni,Flávio J. (1) Rebelo-Mochel,Flávia (1) Santana,Reynaldo Campos (1) Mais... Palavra-chave Leaf reflectance (2) Leaf nitrogen concentration (1) Mangroves (1) Non-destructive analyses (1) Spectral characterization of leaves (1) Spectral reflectance (1) Spectrometer (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Spectral characterization of mangrove leaves in the Brazilian Amazonian Coast: Turiaçu Bay, Maranhão State Anais da ABC (AABC) Rebelo-Mochel,Flávia; Ponzoni,Flávio J.. Mangrove communities are tropical systems which have fewer species than tropical forests, especially in Latin America and display a single architecture, usually lacking the various strata commonly found in other forest ecosystems. The identification of mangrove communities by orbital data is not a difficult task but the most interesting challenge is to identify themselves by the dominant species. The first step toward that floristic identification is the spectral characterization of detached leaves. Leaves from four species of mangrove trees were spectrally characterized considering the Directional Hemispherical Reflectance Factor (DHRF) determined through radiometric measurements using an integrating sphere LICOR 1800 attached to a spectroradiometer... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf reflectance; Mangroves; Spectral characterization of leaves. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000400009 Estimating foliar nitrogen in Eucalyptus using vegetation indexes Scientia Agricola Oliveira,Luiz Felipe Ramalho de; Oliveira,Marcio Leles Romarco de; Gomes,Francisco Sérgio; Santana,Reynaldo Campos. ABSTRACT Nitrogen (N) has commonly been applied in Eucalyptus stands in Brazil and it has a direct relation with biomass production and chlorophyll content. Foliar N concentrations are used to diagnose soil and plant fertility levels and to develop N fertilizer application rates. Normally, foliar N is obtained using destructive methods, but indirect analyses using Vegetation Indexes (VIs) may be possible. The aim of this work was to evaluate VIs to estimate foliar N concentration in three Eucalyptus clones. Lower crown leaves of three clonal Eucalyptus plantations (25 months old) were classified into five color patterns using the Munsell Plant Tissue Color Chart. For each color, N concentration was determined by the Kjeldahl method and foliar reflectance... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf nitrogen concentration; Non-destructive analyses; Spectrometer; Spectral reflectance; Leaf reflectance. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200142 Registros recuperados: 2 Primeira ... 1 ... Última

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