Determination of nitrogen, phosphorus, potassium nutrition status of sugar beet plant by spectrometry reflection techniques in land conditions

This study examines the potential of non-destructive detection and exchange of sugar beet plant nutrients in hyperspectral sensor systems. In particular, a comparison of the three nutrient content of sugar beet was made to facilitate a simplified and reproducible data analysis method for hyperspectral vegetation data. The reflection spectrum (400-1000 nm) of the leaves in the sugar beet vegetation period was replaced by a spectro-radiometer of the nutrient content of nitrogen, phosphorus and potassium. Analyzed for nutrient-specific spectral signatures. Calculation of spectral difference and reflection sensitivity for each wavelength emphasized high interest in the visible and near-infrared region of spectral signatures. Spectral bands showing the best correlation were different depending on the nutrient element. Spectral vegetation reflections related to physiological parameters were calculated (p <0.05). Differences in sugar beet vegetation period were determined and various bands were reduced according to multiple comparison method and models with a high determination coefficient (r2) six and less were developed. Nitrogen, phosphorus and potassium nutrient concentrations in sugar beet vegetation period were determined with developed models. The results showed that a distinctive differentiation of the change in sugar beet content of three nutrients using spectoradiometer measurements is possible using six or fewer bands in combination.