Determination of lignin content in Norway spruce foliage using NIR spectroscopy and hyperspectral data

Contents of biochemical compounds such as chlorophyll, nitrogen, cellulose or lignin in foliage can be used as indicators of the actual tree physiological status and the tree previsible damage. Imaging spectroscopy has been often applied for estimation of relations between foliage spectral and biochemical properties of chlorophyll or nitrogen contents ([4], [10], [15]). But it can also be used for the estimation of other important biochemical compounds in foliage such as lignin and cellulose ([6]; [12]), tannin [14] or polyphenolic compounds [13].