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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
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