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Biosci Biotechnol Biochem ; 88(5): 509-516, 2024 Apr 22.
Artículo en Inglés | MEDLINE | ID: mdl-38425056

RESUMEN

Nutrient availability in hydroponic solutions must be accurately monitored to maintain crop productivity; however, few cost-effective, accurate, real-time, and long-term monitoring technologies have been developed. In this study, we describe the development and application of cation-/anion-exchange chromatography with a neutral eluent (20-mmol/L sodium formate, pH 7.87) for the simultaneous separation (within 50 min) of ionic nutrients, including K+, NH4+, NO2-, NO3-, and phosphate ion, in a hydroponic fertilizer solution. Using the neutral eluent avoided degradation of the separation column during precipitation of metal ion species, such as hydroxides, with an alkaline eluent and oxidation of NO2- to NO3- with an acidic eluent. The suitability of the current method for monitoring ionic components in a hydroponic fertilizer solution was confirmed. Based on our data, we propose a controlled fertilizer strategy to optimize fertilizer consumption and reduce the chemical load of drained fertilizer solutions.


Asunto(s)
Fertilizantes , Hidroponía , Soluciones , Hidroponía/métodos , Cromatografía por Intercambio Iónico/métodos , Fertilizantes/análisis , Nutrientes/análisis , Cationes/análisis , Fosfatos/análisis , Concentración de Iones de Hidrógeno , Potasio/análisis
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