| Correlation analysis of canopy reflectance and coverage of rape in semi-wet rainfed agriculture area |
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| DOI：10.7606/j.issn.1000-7601.2007.04.45 |
| Key Words: rape reflectance spectra coverage vegetation index correlation |
| Author Name | Affiliation | | WANG Jing | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | GUO Ni | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | WANG Xiao-ping | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | DENG Chao-ping | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | GUO Hai-ying | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | HUANG Bin | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | ZHANG Mou-cao | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China | | WANG Yin-zhen | Lanzhou Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster, Key open laboratory of arid climate change and disaster reduction of CMA, Lanzhou,Gansu 730020, China |
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| Abstract: |
| The relationship between coverage and canopy reflectance of rape in seedling, budding and early flowering stage in Xifeng district of Qingyang City was studied. The result showed that rape coverage had a distinct correlation with the spectral reflectance of 450，550，650，850 and 1 650 nm band. And especially in budding stage, this correlation was very significant. In addition, the correlations of ten normal vegetation indexes with coverage were proved, which are more significant than those with single band reflectance. By using the best two VI monitoring models about coverage were constructed, and the fitting degrees are better. But in seedling stage the differences of linear and non-linear regression models are indistinct，in budding stage the linear equation is better, and in early flowering stage the exponential equation is better. |
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