| 光谱学与光谱分析 |
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| Study on Hyperspectral Characteristics of Apple Florescence Canopy |
| ZHU Xi-cun1, ZHAO Geng-xing1*, LEI Tong1, LI Xi-can2, CHEN Zhi-qiang1 |
1. College of Resources and Environment, Shandong Agricultural University，Taian 271018, China
2. College of Information Science and Engineering, Shandong Agricultural University, Taian 271018, China |
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Abstract The present study aims to systematically analyze the hyperspectral characteristics of apple florescence canopy and explore the sensitive spectra to provide the theoretical basis for large area apple information extracting and remote sensing retrieval for nutrition diagnosis. Based on the 120 hyperspectral data of apple florescence canopy acquired with ASD Field Spec 3 portable object spectrometer, the effects of different sample numbers on hyperspectral characteristics were analyzed. Using variance analysis method, the hyperspectral characteristics of apple florescence canopy and the sensitive wave bands were obtained. The results showed that with the increase in cumulative sample numbers, the hyperspectrum curves of apple florescence became stable and smooth. At the 550 nm green peak and the 760-1 300 nm reflection plateau, the reflection rate reduced with the increase in flowering amount, while in the red valley of 670 nm, the reflection rate increased with the increase in flowering amount; At the wave bands of 350-500, 600-680 and 760-1 300 nm, the variance analysis results showed very significant differences, indicating that they were sensitive wave bands of florescence canopy. With the increase in flowering amount, the red-edge position, the red-edge slope and red-edge area tended to decrease gradually.
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Received: 2008-08-10
Accepted: 2008-12-20
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Corresponding Authors:
ZHAO Geng-xing
E-mail: zhaogx@sdau.edu.cn
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