Monitoring nitrogen variability in two Mediterranean ornamental shrubs through proximal fluorescence-based sensors at leaf and canopy level
Autor: | Lorenza Tuccio, Daniele Massa, Sonia Cacini, Paola Iovieno, Giovanni Agati |
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Rok vydání: | 2022 |
Předmět: |
Canopy
Nitrogen balance optical sensors Flavonols Ligustrum japonicum chemistry.chemical_element Prunus laurocerasus Horticulture Biology biology.organism_classification Nitrogen Prunus laurocerasus L chemistry.chemical_compound chemistry Fertilization Chlorophyll Ligustrum japonicum L Ornamental plant Shoot Chlorophyll fluorescence |
Zdroj: | Scientia horticulturae 294 (2022): 1–14. doi:10.1016/j.scienta.2021.110773 info:cnr-pdr/source/autori:Tuccio L.; Massa D.; Cacini S.; Iovieno P.; Agati G./titolo:Monitoring nitrogen variability in two Mediterranean ornamental shrubs through proximal fluorescence-based sensors at leaf and canopy level/doi:10.1016%2Fj.scienta.2021.110773/rivista:Scientia horticulturae/anno:2022/pagina_da:1/pagina_a:14/intervallo_pagine:1–14/volume:294 |
ISSN: | 0304-4238 |
Popis: | Over - fertilization is one of the most relevant issues affecting container-grown nursery plants. The massive application of chemicals results in severe pollution due to nitrogen (N) leaching, and leads to the production of unhealthy plants sensitive to fungal diseases and insect attacks that increase the use of pesticides. The ability of two fluorescence-based sensors (Dualex and Multiplex) for assessing the N-sufficiency of container grown Prunus laurocerasus L. and Ligustrum japonicum L. as test plants was investigated in a two-year long experiment under experimental and commercial growing conditions. An optimal N rate of 450 mg L−1 was identified for both species growing under different N fertilization levels (0 - 1350 mg N L−1). Fluorescence-based indices allowed for reliable estimation of both chlorophyll and nitrogen content at the leaf and canopy level. Absolute and relative sufficiency threshold values were provided and spatially compared under standard nursery conditions. The optimal shoot N concentration of 2.04% (P. laurocerasus) and 1.35% (L. japonicum), and the corresponding non-destructive nitrogen balance index (NBI) values were assessed and used for decision-making on N application and monitoring of the species considered. |
Databáze: | OpenAIRE |
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