Spectral characteristics of Phyllostachys pubescens stand and its differential analysis with typical vegetation

The spectral characteristics of bamboo in different seasons were investigated and compared with typical vegetation by analyzing the spectral curve and first derivative curve, which provided the theoretical basis for remote sensing monitoring. The results showed that:1) a reflection peak and an absorption valley were observed in the bamboo spectral curve at the visible band, and the corresponding wavelengths of these peaks were 556 and 680 mm, respectively. Moreover, the reflectance at the nearinfrared band was significantly increased. 2) The characteristics of first derivative curve for on and off year bamboo were different, the peaks of onyear bamboo at the red edge band in spring and summer presented “two humps”, and the peaks presented “single peak” in autumn and winter, the red edge located at 700 nm in summer and appeared at 718 nm in spring, autumn and winter; however, the peaks of offyear bamboo at the red edge band in autumn presented “two humps”, and the peaks presented “single peak” in winter, the peaks all located at 718 nm in four seasons; the red edge amplitude of bamboo in different seasons was in the order of springsummerwinterautumn. 3)The difference of reflectivity at 500-600, 660-680 and 700-900 nm between the bamboo and other typical vegetations was obvious, so the bands were the best for remote sensing. Moreover, these characteristics, such as “green peak”, “red valley”, position of red edge, amplitude of red edge and the peak type at red edge band, can be taken as main parameters for remote sensing identification of bamboo, and the best season for monitoring is spring, followed by autumn.