Index for potato nitrogen status diagnosis in a three-phase hydroponic system |
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| Authors: | Jaime Barros da Silva Filho Paulo Cezar Rezende Fontes Hermínia Emília Prieto Martinez Roberto Paulo Cecon Milton E. McGiffen |
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| Affiliation: | 1. Federal University of Vi?osa, Avenida Peter Henry Rolfs, Minas Gerais, Brazil;2. jaimeufv@gmail.com;4. Department of Botany and Plant Sciences, University of California Riverside, Riverside, USA |
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| Abstract: | AbstractUp to now, there has not been any research that has tried to establish nitrogen (N) status diagnosis in basic seed potatoes, propagated by sprout in a three-phase hydroponic system. The objective of this study was to develop a potential index to be used in the diagnosis of N status in potato, using a three-phase hydroponic system, with the potato cultivar Agata. The treatments consisted of four N concentrations: 0, 7.8, 13 and 26?mmol L?1. The experiment was conducted in a randomized block design with 12 replications in a non-acclimatized greenhouse. It was evaluated in a destructive and non-destructive way, and in real-time or space–time, 18 biometric characteristics of the reference leaf and of plant organs besides other variables related to the fourth leaf green color. Among the non-destructive characteristics measured, length, and diameter of the internodes and thickness of the fourth leaf showed the highest correlation coefficient (p?
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| Keywords: | chlorophyll color table flavonols NBI SPAD Solanum tuberosum L |
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