Spectral characteristics analysis of typical poisonous weeds in Gannan alpine meadow

Spectral characteristics of grassland plants have important implications for the identification of species. In the present study, spectral differences with 5 species of typical poisonous weeds of Heteropappus bowerii, Ligularia sagitta, Thermopsis lanceolata, Anaphalis lactea and Potentilla anserina in Gannan alpine meadow were analyzed using canopies spectra and parameterized characteristics. Although the tendencies of the original spectral curves of these poisonous weeds were similar, these weeds can be easily distinguished by indices as red valley,green peak, red edge, water uptake, spectral index, and spectral reordering after the first derivative spectra and reordering of the original spectral curves. These results suggested that vegetation classification based on spectral analysis had important significance on the remote sensing research, vegetation investigation and classification of Gannan alpine meadow.