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Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) Ciência Rural
Vian,André Luis; Bredemeier,Christian; Turra,Marcos Alexandre; Giordano,Cecília Paz da Silva; Fochesatto,Elizandro; Silva,Jhonatan Alves da; Drum,Maicon Andreo.
ABSTRACT: Biomass production and nitrogen (N) accumulated in wheat shoots may be used for quantifying optimal topdressing nitrogen doses. The objective of this study was to develop and validate models for estimating the amount of biomass and nitrogen accumulated in shoots and the N topdressing dose of maximum technical efficiency in wheat using the normalized difference vegetation index (NDVI) measured by an active optical canopy sensor. Field experiments were carried out in two years and treatments consisted of N doses applied at plant emergence and as topdressing. NDVI, shoot biomass and N accumulated in shoots at the growth stage of six fully expanded leaves and grain yield were evaluated, being determined the topdressing N dose of maximum technical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Vegetation sensor; Variable rate; Greenseeker.
Ano: 2018 URL:
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