生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2013年
4期
582-587
,共6页
植被%氮素含量%地面成像光谱系统(FISS)%光谱特征
植被%氮素含量%地麵成像光譜繫統(FISS)%光譜特徵
식피%담소함량%지면성상광보계통(FISS)%광보특정
vegetation%nitrogen content%FISS%spectral features
地面成像光谱系统能够在更为微观的尺度上满足多元化应用需求，实现对植物群体、单个植株的快速精细探测，获取精细的植被生理参量的空间信息，从而弥补大尺度远距离遥感难以发挥作用的领域。本文采用ASD地物光谱仪和新型地面成像光谱系统FISS，以大豆叶片为研究对象，获取大豆叶片ASD光谱及FISS成像光谱数据，探讨大豆植株叶片的图像特征、反射率光谱、导数光谱、光谱指数等光谱特征变量与叶片氮素含量的相关性，建立植株叶片氮素含量的估算模型。研究结果表明：FISS地面成像光谱仪和ASD地面非成像光谱仪对氮素具有敏感指示的波段区间一致，480~520 nm和680~720 nm区间的波段范围与氮素含量具有较高的相关性；导数光谱特征所得精度要比原始光谱特征所得精度高，说明导数光谱对氮素含量的指示更为敏感，可以更加有效地提取氮素含量信息；反演模型对氮素含量反演精度的影响低于光谱特征对精度的影响。研究表明FISS数据由于其独特的测量方式和图谱合一的特点，可以更加准确地用于植被氮素含量的反演，实现植被叶片氮素含量的快速实时无损监测及图像可视化表达。
地麵成像光譜繫統能夠在更為微觀的呎度上滿足多元化應用需求，實現對植物群體、單箇植株的快速精細探測，穫取精細的植被生理參量的空間信息，從而瀰補大呎度遠距離遙感難以髮揮作用的領域。本文採用ASD地物光譜儀和新型地麵成像光譜繫統FISS，以大豆葉片為研究對象，穫取大豆葉片ASD光譜及FISS成像光譜數據，探討大豆植株葉片的圖像特徵、反射率光譜、導數光譜、光譜指數等光譜特徵變量與葉片氮素含量的相關性，建立植株葉片氮素含量的估算模型。研究結果錶明：FISS地麵成像光譜儀和ASD地麵非成像光譜儀對氮素具有敏感指示的波段區間一緻，480~520 nm和680~720 nm區間的波段範圍與氮素含量具有較高的相關性；導數光譜特徵所得精度要比原始光譜特徵所得精度高，說明導數光譜對氮素含量的指示更為敏感，可以更加有效地提取氮素含量信息；反縯模型對氮素含量反縯精度的影響低于光譜特徵對精度的影響。研究錶明FISS數據由于其獨特的測量方式和圖譜閤一的特點，可以更加準確地用于植被氮素含量的反縯，實現植被葉片氮素含量的快速實時無損鑑測及圖像可視化錶達。
지면성상광보계통능구재경위미관적척도상만족다원화응용수구，실현대식물군체、단개식주적쾌속정세탐측，획취정세적식피생리삼량적공간신식，종이미보대척도원거리요감난이발휘작용적영역。본문채용ASD지물광보의화신형지면성상광보계통FISS，이대두협편위연구대상，획취대두협편ASD광보급FISS성상광보수거，탐토대두식주협편적도상특정、반사솔광보、도수광보、광보지수등광보특정변량여협편담소함량적상관성，건립식주협편담소함량적고산모형。연구결과표명：FISS지면성상광보의화ASD지면비성상광보의대담소구유민감지시적파단구간일치，480~520 nm화680~720 nm구간적파단범위여담소함량구유교고적상관성；도수광보특정소득정도요비원시광보특정소득정도고，설명도수광보대담소함량적지시경위민감，가이경가유효지제취담소함량신식；반연모형대담소함량반연정도적영향저우광보특정대정도적영향。연구표명FISS수거유우기독특적측량방식화도보합일적특점，가이경가준학지용우식피담소함량적반연，실현식피협편담소함량적쾌속실시무손감측급도상가시화표체。
As the supplement of spaceborne and airborne imaging spectrometer system, Field Imaging Spectrometer System(FISS) spans a very broad range of applications to achieve fast fine detection of plant population and individual plant. Imaging spectrometer system of this new kind could provide vital information to obtain the fine spatial information of vegetation physiological parameters, especially for which spaceborne or airborne remote sensing could not be competent. In this study, we aimed to explore the relationships between image features, spectral reflectance, derivative spectra, spectral indices and nitrogen content of bean leaves with the combination of Field imaging spectrometer system (FISS) and Analytical Spectral Device (ASD). The results showed that the spectral range of ASD that sensitive to nitrogen content was consistent with FISS. The spectral range of 480~520 nm and 680~720 nm was high related to nitrogen content. In addition, the derivative spectra could more accurately be used to inverse nitrogen content than spectral reflectance and is more sensitive to nitrogen content. It should pay more attention on the chosen of spectral features than inversion model of nitrogen content. The study demonstrates that for the advantages of unification of spectra and image, FISS could be used to more accurately estimate vegetation nitrogen content In order to realize the leaf nitrogen content in vegetation real-time non-destructive monitoring and image visualization.
