入侵植物加拿大一枝黄花的高光谱特性研究

Hyperspectral Characteristics of Invasive Plant Canada goldenrod (Solidago canadensis L.)

加拿大一枝黄花(Solidago canadensis L.)原产北美,是一种世界性的入侵性外来杂草,目前正在我国东、南部地区迅速扩散,严重威胁生态系统生物多样性和农林业生产。该研究利用美国ASD公司生产的ASD FieldSpec ProFRTM光谱辐射仪,测定了杭州湾地区加拿大一枝黄花的冠层表观反射率光谱,并分析了其高光谱反射率特征。结果显示:黄光区域内基于位置和面积的高光谱特征参量Dy、λy和SDy具有较小的变异系数,可以作为识别加拿大一枝黄花的特征参量。研究表明:利用高光谱遥感技术来识别外来入侵杂草是可行的。

Canada goldenrod（Solidago canadensis L.） is one kind of invasive alien weeds all over the world,which originates from North American.S.canadensis poses a serious threat to native ecosystem and their biodiversity and production of agriculture and forest,which spreads rapidly in Eastern and Northern China.The hyperspectral reflectance of S.canadensis was measured at the canopy level using the portable spectroradiometer（Field Spec Full Range,Analytical Spectral Devices,Inc.,Colorado,CO,USA） in Hangzhou Bay.The hyperspectral feature parameters including Dy、λy and SDy had lower coefficients of variable,which were extracted from the first derivative reflectance in the yellow light region based on location and area and could be applied to discriminate S.canadensis as the feature parameters.The spectral response characteristics of S.canadensis were analyzed.The result demonstrated that it was feasible to discriminate the invasive alien weeds using hyperspectral remote sensing.