谐波分析红边光谱监测玉米重金属污染  

Harmonic Analysis of Spectrum Red Edge Monitoring Heavy Metal Pollution of Corn

作　　者：刘飞[1] 杨可明[1] 孙阳阳[1] 魏华锋 史钢强 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《湖北农业科学》2015年第15期3747-3750,共4页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(41271436);中央高校基本科研业务费专项资金(2009QD02)

摘　　要：针对日益严重的植被重金属污染问题,提出了谐波分析红边光谱监测玉米重金属污染的方法。设置了不同浓度重金属Cu和Pb胁迫下的玉米盆栽试验,利用谐波分析技术将摄取的玉米叶片红边范围内的光谱进行谐波分解,提取初始相位,并分析了初始相位与叶片光谱红边位置之间的关系。结果表明,初始相位间接反映了受重金属胁迫玉米光谱的"红边蓝移"现象,且叶片光谱的红边位置与重金属含量具有一定的线性关系。因此,可以通过谐波分解的初始相位正确地判断叶片光谱的红边位置,进而可以监测玉米的重金属污染。In view of the increasing heavy metal pollution of vegetation, harmonic analysis of spectrum red edge method was proposed in this paper to monitor the heavy metal pollution of coin, The experiment was seted up of corn potted plants, which stressed under different concentrations .of Cu and Pb, and harmonic analysis technology was used to decompose the spectrum within the scope of the corn leaf red edge, extract the initial phase, and analyze the relationship between the ini- tial phase and spectrum red edge position. Experimental results showed that initial phase reflects ＂Red Edge Blue Shift＂ phe- nomenon of spectrum, which stressed by heavy metal pollution, what＇s more, it had certain linear proportional relationship with heavy metal content and spectral red edge position of corn leaf. Therefore, red edge position of the leaf spectral can be resolved correctly by initial phase, in turn it could monitor the heavy metal pollution of corn.

关 键 词：高光谱遥感 谐波分析 重金属胁迫 初始相位 

分 类 号：X87[环境科学与工程—环境工程]