Spectral characteristics of typical plants in Seriphidium transiliense desert grassland under enclosure

In order to understand the improvements of enclosure on Seriphidium transiliense desert grassland, the spectrum of 3 half-shrubby species including perennial S. transiliense, annual Petrosimonia sibirica and ephemeral Malcolmia maritime from inside and outside fence after different fencing times were measured by portable spectrometer. The results showed that there were significant difference between these 3 plants in visible spectrum which correlated with the plant ecophysiological characteristics. These 3 plants can be distinguished based on the difference of spectral reflectance between 350 and 680 nm. The red edge slope of S. transiliense inside fence was always greater than that of outside fence no matter how long the enclosure whereas the red edge slope of P. sibirica was contrary. There was no significant correlations between the spectrum at platform or red edge of M. maritimes and its ecophysiological characteristics