水稻、玉米的光谱数据与叶绿素的相关分析

Correlation Analysis Between Spectral Data and Chlorophyll of Rice and Maize

探讨了水稻和玉米的多时相的叶片反射光谱数据、群体反射光谱数据与叶绿素含量、叶绿素密度的相关关系 .通过对反射光谱数据进行导数光谱分析和“红边”位置分析 ,结果表明水稻和玉米的叶片反射光谱数据很好地反映了叶片叶绿素含量的信息 ,而它们的群体反射光谱数据与其叶片的叶绿素含量的相关性较小 ,但却能很好地反映叶片叶绿素密度的信息 .因此 ,可以利用群体植被的反射光谱数据进行植被叶片叶绿素密度的估计 .

In this paper, the correlation analysis between foliar reflectance spectra and chlorophyll concentration, between canopy reflectance spectra and foliar chlorophyll concentration, and between canopy reflectance spectra and foliar chlorophyll density of rece and maize have been conducted. Through first dervative analysis and “red edge” andlysis, result shows that the level of correlation between foliar reflectance spectra and foliar chlorophyll concentration is high, but the level of correlation between canopy reflectance spectra and foliar chlorophyll concentration is low. Moreover, the Goodness of Fit ( R 2 ) values between canopy spectra and foliar chlorophyll density is very high. This relationship can be used to estimate the chlorophyll density by the canopy reflectance spectra of rice and maize.