Abstract：The chlorophyll content of plant has relative correlation with photosynthetic capacity and growth levels of plant. It affects the plant canopy spectra, so the authors can use hyperspectral remote sensing to monitor chlorophyll content. By analyzing existing mature vegetation index model, the present research pointed out that the TCARI model has deficiencies, and then tried to improve the model. Then using the PROSPECT+SAIL model to simulate the canopy spectral under different levels of chlorophyll content and leaf area index (LAI), the related constant factor has been calculated. The research finally got modified transformed chlorophyll absorption ratio index (MTCARI). And then this research used optimized soil background adjust index (OSAVI) to improve the model. Using the measured data for test and verification, the model has good reliability.
Key words：Measurement of chlorophyll content;Vegetation index model;TCARI
[1] PU Rui-liang, GONG Peng(浦瑞良, 宫 鹏). Hyperspectral Remote Sensing and Application(高光谱遥感及其应用). Beijing: Higher Education Press(北京：高等教育出版社)，2003. 2. [2] Dawson T P, Curran P J. Remote Sensing of Environment, 1998，65：50. [3] Daughtry C S T, Walthall C I, Kim M S. Remote Sensing of Environment, 2000, 75: 229. [4] Kim M S, Daughtry C S T, Chappelle E W, et al. Proceedings of the 6th Symposium on Physical Measurements and Signatures in Remote Sensing Val D’ Isere, 1994. 299. [5] Haboudane D, Miller J R, Tremblay N. Remote Sensing of Environment, 2002, 81: 416. [6] Qi J. Remote Sensing Environment, 1994, 48: 119. [7] TONG Qing-xi，TIAN Guo-liang(童庆禧, 田国良). Typical Object Spectrum and Its Characteristics Analysis in China(中国典型地物波谱及其特征分析). Beijing: Science Press(北京：科学出版社), 1990. 32. [8] Jacquemoud S, Baret F. Remote Sensing of Environment, 1990, 34: 75. [9] Haboudane D, et al. IGARSS，2008. [10] Thomas J R, Oerther G F. Agron. J., 1972, 64: 11.
