| Autor: |
Abdallah, F. Ben, Philippe, W., Goffart, J. P. |
| Předmět: |
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| Zdroj: |
Journal of Plant Nutrition; 2018, Vol. 41 Issue 20, p2705-2728, 24p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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