山东省招远金矿区春季赤松林的植物地球化学和反射光谱特征

Phytogeochemical Properties and Spectral Reflectance Characte-ristics of Korean Pine Forest in Spring in the Gold Mine Area of Zhaoyuan City(Shandong Province)

本文研究了山东省招远市台上金矿区与背景区赤松林的植物地球化学特征、赤松生长状况和光谱反射率特征的差异。结果表明，赤松对Ａｕ，Ａｇ，Ｃｕ，Ｐｂ等金属元素均呈强积累，赤松针叶中的Ａｕ、Ａｇ元素含量金矿区值和背景区值之比分别可达６和１８。重金属的过量吸收使金矿区赤松的生长状况变差，针叶内叶绿素含量减少，反射光谱特征明显变化。金矿区与背景区对比，赤松的红界蓝移幅度可达８—１２ｎｍ。随重金属污染程度的加重，近红外肩反射率值、叶绿素反射峰值与叶绿素吸收峰值之差均呈下降趋势，一阶导数谱７１０ｎｍ附近平顶斜率由正值变为负值，逐渐变小。反射光谱的这种变化规律可用以遥感探查赤松林下重金属矿藏。

This paper discussed the differences of growing status,phytogeochemi-cal properties and spectral reflectance characteristics of Korean Pine in Taishang go-ld mine area and background in Zhaoyuan City of Shandong province. The resultsare as follows 1.Au,Ag,Cu,Pb are intensely accumulated bv the Korean Pine. The ratio ofgold mine area to background for metal content in leaves of the Korean Pine is 6:1and 18:1 for Au and Ag respectively.2. Excessive absorption of heavy metals makes growing status of the Korean Pinebad so that its spectral characteristics have clearly changed. 3. Contrasting the gold mine area with background,the blue shift of red edgereaches 8 12nm. Following the increasement of heavy metal pollution,the slope ofinflection point of first derivative spectra at about 710 nm changes from positive tonegative and more and more small.The reflectance differences between chlorophyllabsorption peak and reflection peak as well as between chlorophyll absorption peakand infrared should reflectance all go down. The above paterns of reflectance spectra can used to detect heavy-metalliferousdeposit under korean pine forests with remote sensing method.