矿区植被重金属胁迫高光谱分辨率数据分析

High spectral resolution data applied to identify plant stress response to heavy metal in mine site

研究矿区植被重金属胁迫,植被反射光谱测量必不可少。用成像光谱仪野外测试江西德兴铜矿区典型植被的冠层反射波谱曲线,利用导数光谱评价植被“红边”位置。分析得知,植被红边“蓝移”,最大“蓝移”达11nm。根据红边位置与叶绿素含量的正相关关系,并结合铜矿区地质、地貌特点以及开采情况,初步断定铜矿区植被主要受到重金属胁迫而且胁迫程度与植被冠层重金属含量也呈正相关关系。这可作为高光谱分辨率遥感技术在矿区植被修复方面的决策支持和参考依据。

Spectral curves measurement is very necessary to study plant stress.After measuring some spectral curves of typical plants a-round Dexing copper mine by spectroradiometer and estimating the position of red edge from hyperspectral data by derivative spectrum technology,it is show that the red edge of plant shifts from originally red to shorter blue.The biggest shift is amount to 11 nm.According to the relative relationship between the red edge position and chlorophyll content,it is primarily believed that stress induced shifts in the red edge of plants around the copper mine is mainly due to heavy metals and the degree of stress is positive to the metal content in water,combined with geology,topography and exploitation of mine site.Hyperspectral remote sensing technology will provide people with decision support and basis in reclamation of plant stress.What's more,it is crucial for the sustainable development of ecological environment of mine site.