| 光谱学与光谱分析 |
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| Inversion of Organic Matter Content of the North Fluvo-Aquic Soil Based on Hyperspectral and Multi-Spectra |
| WANG Yan-cang1, 2, 3, GU Xiao-he2, 3*, ZHU Jin-shan1, LONG Hui-ling2, XU Peng2, LIAO Qin-hong2 |
1. College of Geometrics, Shandong University of Science and Technology, Qindao 266590, China
2. National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
3. Key Laboratory of Information Technology in Agriculture，Ministry of Agriculture, Beijing 100097, China |
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Abstract The present study aims to assess the feasibility of multi-spectral data in monitoring soil organic matter content. The data source comes from hyperspectral measured under laboratory condition, and simulated multi-spectral data from the hyperspectral. According to the reflectance response functions of Landsat TM and HJ-CCD (the Environment and Disaster Reduction Small Satellites, HJ), the hyperspectra were resampled for the corresponding bands of multi-spectral sensors. The correlation between hyperspectral, simulated reflectance spectra and organic matter content was calculated, and used to extract the sensitive bands of the organic matter in the north fluvo-aquic soil. The partial least square regression (PLSR) method was used to establish experiential models to estimate soil organic matter content. Both root mean squared error (RMSE) and coefficient of the determination (R2) were introduced to test the precision and stability of the modes. Results demonstrate that compared with the hyperspectral data, the best model established by simulated multi-spectral data gives a good result for organic matter content, with R2=0.586, and RMSE=0.280. Therefore, using multi-spectral data to predict tide soil organic matter content is feasible.
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Received: 2013-04-12
Accepted: 2013-06-28
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Corresponding Authors:
GU Xiao-he
E-mail: guxh@nercita.org.cn
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