柑橘树冠层叶密度高光谱信息反演试验分析
Citrus canopy LAI experiment inversion analysis with hyper spectrum

以地物谱仪作为核心的数据采集平台采集光谱数据后通过计算机进行处理拟合，利用光谱分析软件ViewSpecPro，辅助以Excel、SPSS等数据统计软件进行光谱数据反演，探究柑橘树冠层光谱的4种形式与叶面积指数（leaf area index,LAI）的相关性，从而利用相关性最高的光谱参数对LAI进行定量化模拟估算和实时采集。结果表明，LAI与光谱信息系数NDVI、ρ550的反射能量、ρ850的反射能量、一阶导数、红边幅值、红边面积等的拟合方程相关系数（R）分别为0.886、0.906、0.871、0.912、0.798、0.870，相应方程的显著水平P<0.05。NDVI、红边幅值和红边面积与LAI都达到较高的相关水平，可以对柑橘树冠层LAI进行模拟估算。+D23
A system was established as the core of the surface features spectrometer data acquisition platform.The spectral data were collected for processing by computer fitting using spectral analysis software ViewSpecPro,Excel and SPSS statistical software for data inversion to explore four forms of the canopy of citrus spectrum and LAI (leaf area index,LAI) correlation,the advantages of the most relevant spectral parameters of LAI estimation and simulation of quantitative real time acquisition were taken.Results showed that the correlation coefficient of LAI and spectral information on NDVI,the reflection energy of ρ550,the reflection energy of ρ850,the first derivative,the red edge amplitude,the red edge area was 0.886,0.906,0.871,0.912,0.798,0.870,with equation of a significant level less than 0.05.NDVI,red edge magnitude and the edge area and LAI reached a high level of correlation.Citrus tree canopy can be simulated and estimated.