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《Transactions of The Chinese Society of Agricultural Engineering》 2003-02
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Correlation between chemical contents of leaves andcharacteristic variables of hyperspectra on rice field

Wang Xiuzheng 1, Huang Jingfeng 2, Li Yunmei 3, Wang Renchao 2(1. Institute Zhejiang Meteorology, Hangzhou 310004, China;2. Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou310029, China;3.The College of Geography Science, Nanjing Normal University, Nanjing 210097, China)  
The canopy spectra under different levels of nitrogen was used to study the nutritional status of nitrogen. The aim is to find out the relationship between bio chemical parameters (chlorophyll a content, chlorophyll b content, chlorophyll content, sum nitrogen, protein content, fibre content, sheath amylum) and the characteristic variables of hyperspectra on rice field. The results show that the correlation between chlorophyll a and chlorophyll content and the characteristic variables of hyperspectra is reduced while the position of the leaves are shifting from top to bottom. There are relationships between the characteristic variables of hyperspectra(such as the green peak or red valley of reflectivity, the red edge position, the blue edge area and the vegetation indices), and chlorophyll a content and chlorophyll content of up leaves and fibre content, and sheath amylum in leaves. However, the relationship between the characteristic variables of hyperspectra and protein content in leaves cannot be found.
【Fund】: 国家自然科学基金项目 (40 1 71 0 65;40 2 71 0 78)
【CateGory Index】: S127
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