光滑葉片的偏振高光譜特性及與葉綠素含量的關(guān)系

doi:10.3969/2018jms.0037

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光滑葉片的偏振高光譜特性及與葉綠素含量的關(guān)系
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                        10.3969/2018jms.0037
                    
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中圖分類號(hào):S164
基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目（41471277）；公益性行業(yè)（氣象）科研專項(xiàng)（GYH201406027）；廣西科技計(jì)劃項(xiàng)目（桂科AB16380260）

Polarized hyperspectral characteristics of smooth leaves and its relationship with chlorophyll content

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摘要:

為探討偏振光遙感快速估算植物葉綠素含量并用于農(nóng)業(yè)氣象自動(dòng)化觀測(cè)，根據(jù)植物葉綠素顆粒可產(chǎn)生偏振光響應(yīng)的物理特性，應(yīng)用SPAD-502葉綠素儀和加偏振鏡的FieldSpec^{^®}3 Hi-Res便攜式高光譜儀，在多角度觀測(cè)平臺(tái)上測(cè)量和研究了表面光滑的桑樹、紅葉石楠、茶花3種代表性葉片的偏振高光譜特性與葉綠素含量的關(guān)系。結(jié)果表明：對(duì)于光滑葉片而言，550 nm附近的綠峰強(qiáng)度隨著葉綠素含量的增加緩慢降低，即偏振高光譜與葉綠素含量呈非線性關(guān)系；綠峰波段的偏振度（DOP）與葉綠素含量的關(guān)系最好，其次為偏振反射，再次為最高反射和總反射，最低反射的關(guān)系最不明顯。該研究對(duì)進(jìn)一步開展偏振光遙感評(píng)價(jià)作物生長(zhǎng)狀況、災(zāi)害及估產(chǎn)具有重要意義。

Abstract:

The study aims to rapidly estimate chlorophyll content in plants by polarized light remote sensing and apply the method in agrometeorological automatic observation. According to the physical characteristic that the polarized response is produced by chlorophyll particles, SPAD-502 chlorophyll meter and FieldSpec^®3 Hi-Res portable hyper-spectrometer with polarizer were used on the multi-angle observation platform to measure and study the relationship between polarized hyperspectral characteristics and the chlorophyll content of three representative plant leaves with smooth surface, including mulberry, photinia frase and camellia. The results indicate that the intensity of green peak of smooth leaves near 550nm decreases gradually with the increase of chlorophyll content. In other words, the polarization hyperspectrum has a non-linear relationship with chlorophyll content. The Degree of Polarization(DOP) of green peak band has the best relationship with chlorophyll content, followed by polarization reflection, with the highest reflection and total reflection behind, and the relationship with the lowest reflection is the least. This study has great significance for further study on evaluation of crop growth status, disaster and yield estimation with polarized remote sensing.

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秦川,黃敬峰,王海峰,孫涵,張垚,李瑩瑩.光滑葉片的偏振高光譜特性及與葉綠素含量的關(guān)系.氣象科學(xué),2019,39(3):421-426 QIN Chuan, HUANG Jingfeng, WANG Haifeng, SUN Han, ZHANG Yao, LI Yingying. Polarized hyperspectral characteristics of smooth leaves and its relationship with chlorophyll content. Journal of the Meteorological Sciences,2019,39(3):421-426

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收稿日期:2016-12-25
最后修改日期:2018-04-02
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在線發(fā)布日期: 2019-07-01
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