Optimal waveband identification for estimation of leaf area index of paddy rice

作     者：Fu-min WANG Jing-feng HUANG Qi-fa ZHOU Xiu-zhen WANG 

作者机构：Institute of Agricultural Remote Sensing and lnformation Application Zhejiang University Hangzhou 310029 China College of Life Sciences Zhejiang University Hangzhou 310058 China Zhejiang Meteorological Institute Hangzhou 310004 China 

出 版 物：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 (浙江大学学报（英文版）B辑（生物医学与生物技术）)

年 卷 期：2008年第9卷第12期

页      面：953-963页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 082804[工学-农业电气化与自动化] 0905[农学-畜牧学] 08[工学] 0828[工学-农业工程] 0906[农学-兽医学] 09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Natural Science Foundation of China (No. 40571115) the Hi-Tech Research and Development Program (863) of China (No. 2006AA120101) the National Basic Research Program (973) of China (No. 2006BAD10A09) 

主　　题：Rice Hyperspectral reflectance Leaf area index (LAI) Wavebands identification 

摘      要：The objectives of the study were to select suitable wavebands for rice leaf area index （LAI） estimation using the data acquired over a whole growing season, and to test the efficiency of the selected wavebands by comparing them with feature positions of rice canopy spectra. In this study, the field experiment in 2002 growing season was conducted at the experimental farm of Zhejiang University, Hangzhou, China. Measurements of hyperspectral reflectance （350-2500 nm） and corresponding LAI were made for a paddy rice canopy throughout the growing season. And three methods were employed to identify the optimal wavebands for paddy rice LAI estimation： correlation coefficient-based method, vegetation index-based method, and stepwise regression method. This research selected 15 wavebands in the region of 350-2500 nm, which appeared to be the optimal wavebands for the paddy rice LAI estimation. Of the selected wavebands, the most frequently occurring wavebands were centered around 554, 675, 723, and 1633 rim. They were followed by 444, 524, 576, 594, 804, 849, 974, 1074, 1219, 1510, and 2194 rim. Most of them made physical sense and had their counterparts in spectral known feature positions, which indicates the promising potential of the 15 selected wavebands for the retrieval of paddy rice LAI.