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首页> 外文会议>Remote sensing for agriculture, ecosystems, and hydrology XI >Detection of vegetation LUE based on chlorophyll fluorescence separation algorithm from Fraunhofer line
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Detection of vegetation LUE based on chlorophyll fluorescence separation algorithm from Fraunhofer line

机译：基于Fraunhofer线叶绿素荧光分离算法的植被LUE检测

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摘要

Photosynthetic efficiency is very important, and not yet generally assessable by remote sensing. Much research has proved the possibility of the separation of solar-induced chlorophyll fluorescence (ChlF) from the reflected hyperspectral data. As the 'probe' of plant photosynthesis, it is possible to detect photosynthetic light use efficiency (LUE) by the separated solar-induced ChlF. A diurnal experiment was carried out on winter wheat on Apr. 18, 2008, and the canopy radiance spectra and leaf LUE data were measured synchronously. The solar-induced chlorophyll fluorescence signals at 760nm and 688nm were separated from the reflected radiance spectral based on Fraunhofer lines in two oxygen absorption bands. The result showed that LUE was negatively correlated to the separated chlorophyll signals. The statistical models for LUE based on the solar-induced chlorophyll fluorescence values at 688 nm and 760 nm bands had correlation coefficients (R~2) of 0.64 and 0.78, respectively. In addition, photochemical reflectance index (PRI) was also linked to LUE, and a statistical model for LUE based on PRI has a correlation coefficient (R~2) of 0.66. The presented method provides a novel solution for monitoring LUE from remote sensing data.
机译：光合作用效率非常重要，尚不能通过遥感普遍评估。大量研究证明了从反射的高光谱数据中分离出太阳诱导的叶绿素荧光（ChlF）的可能性。作为植物光合作用的“探针”，有可能通过分离的太阳诱导的ChlF来检测光合光利用效率（LUE）。于2008年4月18日对冬小麦进行了昼夜试验，同步测量了冠层辐射光谱和叶片LUE数据。基于弗劳恩霍夫谱线在两个氧气吸收带中，将太阳诱导的760nm和688nm的叶绿素荧光信号与反射辐射光谱分开。结果表明，LUE与分离的叶绿素信号呈负相关。基于太阳诱导的688 nm和760 nm波段叶绿素荧光值的LUE统计模型的相关系数（R〜2）分别为0.64和0.78。此外，光化学反射指数（PRI）也与LUE相关联，基于PRI的LUE统计模型的相关系数（R〜2）为0.66。提出的方法提供了一种从遥感数据监测LUE的新颖解决方案。

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