棉 花 学 报     Cotton   Science    2010，22（1）：70-76

Monitoring Soil Nitrogen and Plant Nitrogen Based on Hyperspectral of Cotton Canopy
PAN Wen-Chao^1,2，LI Shao-kun^1,2*，WANG Ke-ru^1,2，XIAO Hua¹，CHEN Bing¹，WANG Fang-yong¹，SU Yi²，CHEN Jiang-lu²，LAI Jun-chen^1,2，HUANG Fang-de¹
(1.Key Laboratory of Oasis Ecology Agriculture of Xinjiang Construction Crop/The Center of Crop High-yield Research, Shihezi, Xinjiang 832003,China；2.Institute of Crop Science, Chinese Academy of Agricultural Sciences/The National Key Facilities for Crop Genetic Resources and Improvement, NFCRI, Beijing 100081,China)

Abstract：Through a 2-year community trial of nitrogen fertilizer in cotton, canopy hyperspectral data and synchronous determination of soil nitrogen content at different growth stages were obtained and the relationship between cotton canopy hyperspectral parameters and the soil nitrogen content was analyzed, soil nitrogen content estimation model based on hyperspectral parameter was established. The results showed that the nitrogen content increased with nitrogen level. The correlation between 14 kinds of selected parameters based on hyperspectral data of diffeled periods and plant nitrogen content was significantly different. The use of the soil nitrogen content model that established with spectral parameters P_Area 1100、Depth 980、Area 672、PPR(550,540) in four key developmental stages showed a higher prediction accuracy. It can be concluded that using spectra spectroscopic methods to monitor soil nitrogen content are feasible.
Key words：cotton；canopy spectra；soil nitrogen content; hyperspectral parameters
            [Full Text, 530KB]