Exploring VIS/NIR reflectance indices for the estimation of water status in highbush blueberry plants grown under full and deficit irrigation

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dc.contributor.authorRibera-Fonseca, Alejandra
dc.contributor.authorJorquera Fontena, Emilio
dc.contributor.authorCastro, Manuel
dc.contributor.authorAcevedo, Patricio
dc.contributor.authorParra, Juan Carlos
dc.contributor.authorReyes-Diaz, Marjorie
dc.date2019
dc.date.accessioned2021-04-30T16:35:22Z
dc.date.available2021-04-30T16:35:22Z
dc.description.abstractRemote sensing based on visible and near infrared (VIS/NIR) reflectance is being recognized as a promising option to estimate water status in crops. In this research, we explored the relationship between the midday leaf water potential (Psi(MD)) and stomatal conductance (g(s)) with the normalized difference vegetation index (NDVI) and the water index (WI) in leaves of blueberry shrubs subjected to two irrigation treatments based on crop evapotranspiration (ETc): mild water deficit (60% of ETc) and full-irrigation (100% of ETc). Moreover, the impact of the irrigation doses on photosynthesis as well as on fruit yield and quality was assessed. Noteworthy, we detected positive correlations between Psi(MD) with NDVI (R-2 = 0.61**; P < 0.01) and WI (R-2 = 0.60**, P < 0.01). Besides, g(s) was positively related to NDVI (R-2 = 0.58**, P < 0.01) and WI (R-2 = 0.69**, P < 0.01). Nonetheless, both indices appear to be more sensitive to water stressed plants. Despite mild water deficit decreased photosynthetic performance, fruit yield and quality were maintained or improved. Our results revealed that the spectral indices studied here could be used as non-destructive predictors of plant water stress in blueberry orchards. Further studies are needed to confirm our outcomes.
dc.identifier.citationSCIENTIA HORTICULTURAE,Vol.256,,2019
dc.identifier.doi10.1016/j.scienta.2019.108557
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3157
dc.language.isoen
dc.publisherELSEVIER
dc.sourceSCIENTIA HORTICULTURAE
dc.subject.englishReflectance
dc.subject.englishNormalized difference vegetation index (NDVI)
dc.subject.englishWater index (WI)
dc.subject.englishSpectral indices
dc.subject.englishWater content
dc.subject.englishIrrigation
dc.subject.englishEvapotranspiration
dc.titleExploring VIS/NIR reflectance indices for the estimation of water status in highbush blueberry plants grown under full and deficit irrigation
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
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