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Journal of Arid Land  2012, Vol. 4 Issue (1): 52-62    DOI: 10.3724/SP.J.1227.2012.00052
Research Articles     
Retrieval of leaf biochemical properties by inversed PROSPECT model and hyperspectral indices: an application to Populus euphratica polymorphic leaves
ZhongGuo MA1, Xi CHEN1, Quan WANG1,2, PingHeng LI1, Guli Jiapaer1
1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2 Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan
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Abstract  Leaf biochemical properties have been widely assessed using hyperspectral reflectance information by inversion of PROSPECT model or by using hyperspectral indices, but few studies have focused on arid ecosystems. As a dominant species of riparian ecosystems in arid lands, Populus euphratica Oliv. is an unusual tree species with polymorphic leaves along the vertical profile of canopy corresponding to different growth stages. In this study, we evaluated both the inversed PROSPECT model and hyperspectral indices for estimating biochemical properties of P. euphratica leaves. Both the shapes and biochemical properties of P. euphratica leaves were found to change with the heights from ground surface. The results indicated that the model inversion calibrated for each leaf shape performed much better than the model calibrated for all leaf shapes, and also better than hyperspectral indices. Similar results were obtained for estimations of equivalent water thickness (EWT) and leaf mass per area (LMA). Hyperspectral indices identified in this study for estimating these leaf properties had root mean square error (RMSE) and R2 values between those obtained with the two calibration strategies using the inversed PROSPECT model. Hence, the inversed PROSPECT model can be applied to estimate leaf biochemical properties in arid ecosystems, but the calibration to the model requires special attention.

Key wordsTarim River Basin      climate change      hydrological change      water resources      streamflow     
Received: 27 June 2011      Published: 05 March 2012

The West Light Talents Cultivation Program of Chinese Academy of Sciences (XBBS 200801), the National Natural Science Foundation of China (40801146), and the JSPS Project (21403001).

Corresponding Authors: Xi CHEN     E-mail:
Cite this article:

ZhongGuo MA, Xi CHEN, Quan WANG, PingHeng LI, Guli Jiapaer. Retrieval of leaf biochemical properties by inversed PROSPECT model and hyperspectral indices: an application to Populus euphratica polymorphic leaves. Journal of Arid Land, 2012, 4(1): 52-62.

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