Abstract:The reflectance characteristics of Hevea brasiliensis leaves were analyzed by using spectral curve and transform features. The results showed that the positions of blue edge, red edge and yellow edge were appeared at near 525 nm, 725 nm and 550 nm, respectively. The correlation between the reflectance spectral data and nitrogen content in rubber leaves was significant within the sensitive waveband (700~1300 nm), which correlation coefficient was the highest (r=0.8422) at the most sensitive waveband (730 nm). The linear regression between the reflectance spectral data and the nitrogen contents was established with the multiple correlation coefficient (R2) at 0.7094.
