红透山铜矿区长白落叶松反射光谱响应特征分析

Analysis of Spectral Response Characteristics of Larix olgensis Henry in Hongtoushan Copper Mine

为利用遥感技术高效检测红透山铜矿区污染土壤中铜含量,以长白落叶松为中介,通过盆栽实验研究不同程度铜污染土壤中植物在不同时间段反射光谱和所含色素的变化,以确定最佳光谱检测时间。研究结果表明:不同铜含量下光谱差异最明显的红外反射坪波段区间是800~1200 nm;长白落叶松针叶中各种色素含量大小顺序依次为叶绿素a、叶绿素b、类胡萝卜素;秋季9月底的长白落叶松光谱反射率与叶绿素a和总叶绿素的相关性最高,该时段的光谱对主要色素含量的响应最敏感、效果最稳定;光谱检测最佳时段为秋季9月底,其次为春季5月初。

In order to use remote sensing technology to effectively detect copper content in the contaminated soil of Hongtoushan copper mine area,Larix olgensis Henry was used as a medium to study the changes of reflection spectra and pigments of plants in copper contaminated soil of different degrees at different time periods through pot experiments,so as to determine the best spectral detection time.The results show that the band range of infrared reflection plateau with the most obvious spectral difference under different copper content is 800~1200 nm;the order of pigment content in the needles of Larix olgensis was chlorophyll a,chlorophyll b and carotenoids;at the end of September in autumn,the correlation between the spectral reflectance of Larix olgensis and chlorophyll a and total chlorophyll is the highest,and the spectral response to the main pigment content is the most sensitive and the effect is the most stable;the best time for spectral detection is the end of September in autumn,followed by the beginning of May in spring.