| 光谱学与光谱分析 |
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| Nitrogen Stress Measurement of Canola Based on Multi-Spectral Charged Coupled Device Imaging Sensor |
| FENG Lei1, FANG Hui1, ZHOU Wei-jun2, HUANG Min1, HE Yong1* |
1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2. College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China |
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Abstract Site-specific variable nitrogen application is one of the major precision crop production management operations. Obtaining sufficient crop nitrogen stress information is essential for achieving effective site-specific nitrogen applications. The present paper describes the development of a multi-spectral nitrogen deficiency sensor, which uses three channels (green, red, near-infrared) of crop images to determine the nitrogen level of canola. This sensor assesses the nitrogen stress by means of estimated SPAD value of the canola based on canola canopy reflectance sensed using three channels (green, red, near-infrared) of the multi-spectral camera. The core of this investigation is the calibration methods between the multi-spectral references and the nitrogen levels in crops measured using a SPAD 502 chlorophyll meter. Based on the results obtained from this study, it can be concluded that a multi-spectral CCD camera can provide sufficient information to perform reasonable SPAD values estimation during field operations.
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Received: 2006-02-28
Accepted: 2006-07-15
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Corresponding Authors:
HE Yong
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| Cite this article: |
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FENG Lei,FANG Hui,ZHOU Wei-jun, et al. Nitrogen Stress Measurement of Canola Based on Multi-Spectral Charged Coupled Device Imaging Sensor [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(09): 1749-1752.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2006/V26/I09/1749 |
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