The canopy spectral reflectance,the multi-spectral image and the canopy temperature were fused to quantitatively analyze the rape moisture content based on nondestructive testing of rape water stress. Stepwise regression method was used to extract the features of moisture content from different sensors. The water stress index( CWSI) was obtained by detecting canopy-air temperature difference and environment temperature and humidity to compensate light influence. The results show that the spectral features a...