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Effect of Leaf Dust Retention on Spectral Characteristics of Euonymus japonicus and Its Dust Retention Prediction |
ZHU Ji-you1, YU Qiang1*, LIU Xiao-xi2, YU Yang3, YAO Jiang-ming4, SU Kai1, NIU Teng1, ZHU Hua5, ZHU Qiu-yu5 |
1. Forestry College, Beijing Forestry University, Beijing 100083,China
2. Foreign Languages College, Beijing Forestry University, Beijing 100083,China
3. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094,China
4. Forestry College, Guangxi University, Nanning 530005, China
5. Department of Testing, Guangxi Medical College, Nanning 530012, China |
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Abstract Atmospheric particulate pollution has become one of the serious urban environmental problems on a global scale. In order to explore the influence of leaf surface dust on the spectral characteristics of the leaves, a prediction model of leaf surface dross based on high-spectrum data was established. In order to explore the influence of leaf surface dust on the spectral characteristics of the leaves, a prediction model of leaf surface dross based on high-spectrum data was established. Our study focused on the common greening tree species (Euonymus japonicus) in Beijing, and collected 720 leaf samples in high, medium and low dust pollution gradient environments, and then used the ASDF Fildsoec Handheld spectrometer to obtain hyperspectral data. The results showed that the spectral reflection peaks were at 560 and 900 nm, respectively, and the absorption valleys were in the range of 400~500, 600~700 and 1 000~1 050 nm. The leaf reflectivity with or without dust retention showed different rules in different bands. The spectral reflectances in the range of 400~760 and 760~1 100 nm were as follows: dust-retaining leaves>dust-removing leaves, dust-retaining leavesR2,which were y=-1.18x2+0.542 4x+0.991 7, y=-7.67x2+3.692 4x+0.371 4, respectively. The regression model was validated by using the predicted samples, and the R2 reached 0.987 7 and 0.887 3, respectively. The fitting effect was good, indicating that the two prediction models can effectively estimate the dust retention of the leaf of Euonymus japonicus.
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Received: 2019-01-18
Accepted: 2019-05-20
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Corresponding Authors:
YU Qiang
E-mail: yuqiang@bjfu.edu.cn
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