武陵源风景名胜区珙桐群落主要树种特征光谱研究  

Study on the spectral characteristics of main tree species in Davidia involucrate community in Wulingyuan scenic spot

作　　者：曾婷 田建林 丁彬彬 王高 周子群 徐琴倩 ZENG Ting;TIAN Jian-lin;DING Bin-bin;WANG Gao;ZHOU Zi-qun;XU Qin-qian(School of Civil Engineering&Architecture,Jishou University,Zhangjiajie 427000,Hunan,China)

机构地区：[1]吉首大学土木工程与建筑学院,湖南张家界427000

出　　处：《湖北农业科学》2023年第10期132-136,190,共6页Hubei Agricultural Sciences

基　　金：2022年度湖南省吉首大学校级科研课题研究生校级科研项目(JGY2022079);湖南省研究生科研创新项目(CX20211059);湖南省大学生创新创业训练计划项目(20211972994)。

摘　　要：为探明湖南省张家界市武陵源风景名胜区珍稀植物珙桐(Davidia involucrata Baill.)及其群落主要树种的特征光谱,借助ASD FieldSpec 4型便携地物光谱仪,运用微分法和去包络线法分析了珙桐、野鸦椿[Euscaphis japonica(Thunb.)Dippel]、红枫(Acer palmatum‘Atropurpureum’)、香樟[Cinnamomum camphora(Linn)Presl]、木荷(Schima superba Gardn.et Champ.)5类树种的反射光谱。结果表明,原始光谱曲线位于近红外波段处,珙桐群落主要树种反射率差异明显,可用于识别的最优波段为780~920 nm、1000~1349 nm、1427~1590 nm、1590~1785 nm、1981~2459 nm;490~530 nm、550~582 nm、680~760 nm、1110~1190 nm是一阶微分数据结合“三边”参数分析得出的最佳区分波段;基于去包络线曲线分析,曲线突出显示的4个吸收谷和1个反射峰,其特征波段是440~500 nm、520~640 nm、640~690 nm。光谱吸收特征参数基于曲线去包络线540~760 nm波段数据分析得出,可以通过该波段的吸收峰面积和光谱吸收系数对该5类树种进行区分。In order to find out the characteristic spectrum of Davidia involucrata,a rare plant in Wulingyuan scenic spot,Zhangjiajie City,Hunan Province,and its main tree species in the community,using the ASD FieldSpec 4 portable ground object spectrometer,the reflectance spectra of five tree species,including Davidia involucrata,Euscaphiss japonica,Acer palmatum‘Atropurpureum’,Cinnamomum camphora and Schima superba were analyzed using differential and continuum removal methods.The results showed that the original spectral curve was located in the near-infrared band,and there were significant differences in the reflectance of the main tree species in the Davidia involucrata community.The optimal bands for identification were 780~920 nm,1000~1349 nm,1427~1590 nm,1590~1785 nm,and 1981~2459 nm;490~530 nm,550~582 nm,680~760 nm,1110~1190 nm were the best distinguishing bands obtained by combining first-order differential data with“trilateral parameter”analysis;based on the analysis of the continuum removal curve,the curve highlighted four absorption valleys and one reflection peak,with characteristic bands of 440~500 nm,520~640 nm,640~690 nm.The spectral absorption characteristic parameters were analyzed based on the continuum removal data in the 540~760 nm band,and the five types of tree species could be distinguished by the absorption peak area and spectral absorption coefficient in this band.

关 键 词：武陵源风景名胜区 珙桐(Davidia involucrata Baill.) 群落 特征光谱 湖南省张家界市 

分 类 号：O433.4[机械工程—光学工程]