Inversion of Populus×euramericana cv."74/76" Chlorophyll Concentration Based on the Hyper-Spectrum
Parameters of Populus× euramericana cv."74/76" leaves determined by Field-Spec Pro were adopted to study spectral characteristics of the leaves which contained different chlorophyll contents,to examine the relationships of chlorophyll content and 11 vegetation spectral inversion models,as well as the spectral inversion model of leaf chlorophyll content.The spectral reflectance presented typical plant spectral characteristics.The blue valley appeared in 350-500 nm and centered at 350 nm.The green peak appeared in 500-600 nm and centered at 552 nm.The red valley located in 600-700 nm and centered at 672 nm.Infrared ray,wave length longger than 700 nm,entering the near infrared reflectance platform,and centered at 762 nm.The chlorophyll content of P.× euramericana cv."74/76" leaves and 11 vegetation indices were highly correlated.The correlation of mND705 vegetation index and chlorophyll content in the leaves was the most significant with a R2 of 0.69.The established chlorophyll retrieval model based on vegetation index showed that inversion precision of inversion model y=0.09x1,6217 of mND705 vegetation index of high-spectrum was the highest,the fitting R2 and predicted R2 which all reached maximum,were 0.812 4 and 0.703 5,respectively.RMSE was 0.007 0,indicating that the method of monitor the Populus × euramericana cv."74/76” leaves spectral can be used to the measurement of leaf chlorophyll content.
Populus × euramericana cv."74/76"chlorophyllspectral reflectanceinversion modelvegetation index
国家科技期刊平台
NSTL
万方数据
维普
