Fecha/hora: 16/06/2024 00:05:00

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	01/11/2021	
Fecha de la última actualización: 	01/11/2021	
Autoria: 	DE SOUZA, R.; PEÑA-FLEITAS, M.T.; THOMPSON, R.B.; GALLARDO, M.; GRASSO, R.; PADILLA, F.M.	
Afiliación: 	ROMINA DE SOUZA, Department of Agronomy, University of Almeria, Almería, Spain; Universidad de la República, CENUR LN Departamento del Agua - Facultad de Agronomía, Salto, 50000, Uruguay; M. TERESA PEÑA-FLEITAS, Department of Agronomy, University of Almeria, Almería, Spain; RODNEY B. THOMPSON, Department of Agronomy, University of Almeria, Almería, Spain; CIAIMBITAL Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology, University of Almeria, Almería, Spain; MARÍA GALLARDO, Department of Agronomy, University of Almeria, Almería, Spain; CIAIMBITAL Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology, University of Almeria, Almería, Spain; RAFAEL GILLSON GRASSO RODRIGUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FRANCISCO M. PADILLA, Department of Agronomy, University of Almeria, Almería, Spain; CIAIMBITAL Research Centre for Mediterranean Intensive Agrosystems and Agrifood Biotechnology, University of Almeria, Almería, Spain.	
Título: 	Use of fluorescence indices as predictors of crop N status and yield for greenhouse sweet pepper crops.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Precision Agriculture, 2021, OPEN ACCESS. Doi: https://doi.org/10.1007/s11119-021-09837-4	
ISSN: 	1385-2256	
DOI: 	10.1007/s11119-021-09837-4	
Idioma: 	Inglés	
Notas: 	Article history: Accepted 18 August 2021; Published 09 September 2021.
Contiene información suplementaria.	
Contenido: 	ABSTRACT. - To increase nitrogen (N) use efficiency and reduce water pollution from vegetable production, it is necessary to optimize N management. Fluorescence-based optical sensors are devices that can improve N fertilization through non-destructive field monitoring of crop variables. The aim of this work was to compare the performance of five fluorescence indices (SFR-R, SFR-G, FLAV, NBI-R, and NBI-G) to predict crop variables, as dry matter production, crop N content, crop N uptake, Nitrogen Nutrition Index (NNI), absolute and relative yield, in sweet pepper (Capsicum annuum) crops grown in greenhouse. Fluorescence measurements were periodically made with the Multiplex® 3.6 sensor throughout three cropping cycles subjected to five N application treatments. The performance of fluorescence indices to predict crop variables considered calibration and validation analyses. In general, the five fluorescence indices were strongly related with NNI, crop N content and relative yield. The best performing indices to predict crop N content and NNI at the early stages of the crops (i.e., vegetative and flowering phenological stages) were the SFR indices, both under red (SFR-R) and green (SFR-G) excitation. However, in the final stage of the crop (i.e., harvest stage), the best performing indices were NBI, both under red (NBI-R) and green (NBI-G) excitation, and FLAV. The two SFR indices best predicted relative yield of sweet pepper at early growth stages. Overall, the fluorescence sensor and the fluorescence indices evaluated were able to predict crop variables related to N status in sweet pepper. They have the capacity to be incorporated into best N management practices. © 2021, The Author(s).	
Palabras-Clave: 	Flavonols meter; Fluorimeter; Nitrogen Nutrition Index; Vegetable crops; Yield.	
Thesagro: 	CAPSICUM ANNUUM.	
Categoría del tema: 	F01 Cultivo	
URL: 	https://link.springer.com/content/pdf/10.1007/s11119-021-09837-4.pdf
https://static-content.springer.com/esm/art%3A10.1007%2Fs11119-021-09837-4/MediaObjects/11119_2021_9837_MOESM1_ESM.docx	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102828-1) - PXI - AP - DD - PP/Precision Agriculture/2021 -  -  - DIS