The models for estimation of dry biomass from different components of rapeseed using canopy spectral data

The canopy spectral reflectance of four varieties and 3 N levels were measured by a ASD FieldSpec Pro FR~(TM) under the field condition at different growth stages of rapeseed. The normalized difference vegetation index (NDVI) and ratio vegetation index (RVI) were calculated using canopy spectral data. The correlation coefficient between dry biomass of rapeseed and spectrum vegetation indices were significant at 0.05 level. The models for estimation of dry biomass from different components of rapeseed using canopy spectral data were established. All the model were also significant at 0.05 level.