Use of fluorescence indices as predictors of crop N status and yield for greenhouse sweet pepper crops
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URI: http://hdl.handle.net/10835/14936
DOI: https://doi.org/10.1007/s11119-021-09837-4
DOI: https://doi.org/10.1007/s11119-021-09837-4
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De Souza Ibarra, Stefani Romina; Peña-Fleitas, María Teresa; Thompson, Rodney; Gallardo Pino, Luisa; Grasso, Rafael; [et al.]Fecha
2021-09-09Resumen
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 performin...
Palabra/s clave
Capsicum annuum
Flavonols meter
Fluorimeter
Nitrogen Nutrition Index
Vegetable crops
Yield