Article (Scientific journals)
Comparison of optical indicators for potato crop nitrogen status assessment including novel approaches based on leaf fluorescence and flavonoid content
Ben Abdallah, Feriel; Goffart, Jean Pierre; Philippe, William
2018In Journal of Plant Nutrition, 41 (20), p. 2705-2728
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Keywords :
leaf flavonoid content; leaf chlorophyll content; nitrogen; potato; optical sensors
Abstract :
[en] Some phenolic compounds are proposed as good indicators of crop nitrogen status (CNS). This research compared the use of leaf flavonoid content (LFC) as a potential indicator for evaluating potato CNS with other recognized indicators linked to leaf chlorophyll content (LCC). Three-year trials were conducted in Belgium on two potato cultivars including increasing nitrogen rates. Optical sensors (Dualex, Multiplex, Hydro N-tester, Cropscan) were used to evaluate LFC and/or LCC. Plant tissue samples were analyzed to calculate the biomass nitrogen concentration and the nitrogen nutrition index. The indicators were evaluated based on four criteria: the sensitivity, the earliness of the diagnosis, the accuracy, and the specificity. Apart from the low specificity to nitrogen, which can be improved by the use of a within-field reference plot, the LFC (combined with LCC or individually) matched the required criteria and could be suggested as a valuable indicator for assessing potato CNS.
Research center :
Centre Wallon de Recherches Agronomiques
Disciplines :
Agriculture & agronomy
Author, co-author :
Ben Abdallah, Feriel ;  Centre wallon de Recherches Agronomiques
Goffart, Jean Pierre;  Centre wallon de Recherches Agronomiques
Philippe, William;  entre wallon de Recherches Agronomiques
Language :
English
Title :
Comparison of optical indicators for potato crop nitrogen status assessment including novel approaches based on leaf fluorescence and flavonoid content
Publication date :
2018
Journal title :
Journal of Plant Nutrition
ISSN :
0190-4167
Publisher :
Marcel Dekker, United States - New York
Volume :
41
Issue :
20
Pages :
2705-2728
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
PotFluo
Funders :
SPW Agriculture, Ressources naturelles et Environnement - Service Public de Wallonie. Agriculture, Ressources naturelles et Environnement [BE]
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