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dc.contributor.authorDe Souza, Romina
dc.contributor.authorPeña Fleitas, María Teresa 
dc.contributor.authorThompson, Rodney 
dc.contributor.authorGallardo Pino, María Luisa
dc.contributor.authorPadilla Ruiz, Francisco Manuel 
dc.date.accessioned2020-03-02T11:08:11Z
dc.date.available2020-03-02T11:08:11Z
dc.date.issued2020-02-26
dc.identifier.issn2072-4292
dc.identifier.urihttp://hdl.handle.net/10835/7737
dc.description.abstractVegetation indices (VIs) can be useful tools to evaluate crop nitrogen (N) status. To be effective, VIs measurements must be related to crop N status. The nitrogen nutrition index (NNI) is a widely accepted parameter of crop N status. The present work evaluates the performance of several VIs to estimate NNI in sweet pepper (Capsicum annuum). The performance of VIs to estimate NNI was evaluated using parameters of linear regression analysis conducted for calibration and validation. Three different sweet pepper crops were grown with combined irrigation and fertigation, in Almería, Spain. In each crop, five different N concentrations in the nutrient solution were frequently applied by drip irrigation. Proximal crop reflectance was measured with Crop Circle ACS470 and GreenSeeker handheld sensors, approximately every ten days, throughout the crops. The relative performance of VIs differed between phenological stages. Relationships of VIs with NNI were strongest in the early fruit growth and flowering stages, and less strong in the vegetative and harvest stages. The green band-based VIs, GNDVI, and GVI, provided the best results for estimating crop NNI in sweet pepper, for individual phenological stages. GNDVI had the best performance in the vegetative, flowering, and harvest stages, and GVI had the best performance in the early fruit growth stage. Some of the VIs evaluated are promising tools to estimate crop N status in sweet pepper and have the potential to contribute to improving crop N management of sweet pepper crops.es_ES
dc.language.isoenes_ES
dc.publisherMDPIes_ES
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectcanopy reflectancees_ES
dc.subjectcrop N statuses_ES
dc.subjectCapsicum annuumes_ES
dc.subjectproximal optical sensorses_ES
dc.titleAssessing Performance of Vegetation Indices to Estimate Nitrogen Nutrition Index in Pepperes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherversionhttps://www.mdpi.com/2072-4292/12/5/763es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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