| 光谱学与光谱分析 |
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| Response of Winter Wheat (Triticum aestivum L. ) Hyperspectral Characteristics to Low Temperature Stress |
| REN Peng, FENG Mei-chen*, YANG Wu-de, WANG Chao, LIU Ting-ting, WANG Hui-qin |
| Institute of Dry Farming Engineering, Shanxi Agricultural University, Taigu 030801, China |
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Abstract The simple winter wheat variety was conducted under the low temperature treatment at -2, -4, and -6 ℃, the canopy reflectance was measured and the red edge parameters were extracted to study the winter wheat canopy spectral characteristics effected by the low temperature stress and the hyperspectral response to the low temperature stress of winter wheat at jointing stage. The results showed that the canopy reflectance decreased in visible region and increases at near infrared band with the high intensively low temperature stress, and "green peak" was weakened and “red well” was not distinctive. Moreover, the derivate spectrum had the trend of shift to short wavelength direction with the strengthening of low temperature stress and the red edge presented the blue shift. The area of red edge and red edge amplitude exhibit increase. It indicated that the canopy spectrum of winter wheat is sensitive to the low temperature stress, and the hyperspectral technology can be used to monitor the low temperature stress of winter wheat at jointing stage.
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Received: 2014-01-24
Accepted: 2014-04-18
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Corresponding Authors:
FENG Mei-chen
E-mail: fmc101@163.com
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