重金属污染胁迫下盐肤木的生化效应及波谱特征  

Biogeochemistry Responses and Spectral Characteristics of Rhus Chinensis Mill under Heavy Metal Contamination Stress

作　　者：李庆亭[1] 杨锋杰[2] 张兵[1] 张霞[1] 周广柱[2] 

机构地区：[1]中国科学院,遥感应用研究所,遥感信息科学国家重点实验室,北京100101 [2]山东科技大学,地球信息科学与工程学院,山东青岛266510

出　　处：《遥感学报》2008年第2期284-290,共7页NATIONAL REMOTE SENSING BULLETIN

基　　金：国土资源部专项计划项目(编号:30302408-3);国家自然科学基金(编号:40571113)

摘　　要：利用遥感生物地球化学的原理和方法,分析了德兴铜矿的重金属污染状况和植物盐肤木的生物地球化学效应,对盐肤木生物地球化学效应的波谱特征进行了系统的提取和分析。研究发现酸、铜、镉等是德兴铜矿地区主要的环境污染因子,野外调查及样品的化验分析表明盐肤木对铜元素呈现一定的富集作用和很强的位移效应,是适合铜矿复垦的植被。利用导数光谱、包络线去除、红边效应、植被指数等光谱信息处理方法对盐肤木的野外波谱分析表明,随着叶片中Cu等金属元素含量的增大,其产生的毒化效应的波谱特征越明显,盐肤木叶片光谱反射率明显升高,波形蓝移,红边陡坡斜率增大,叶绿素吸收深度变浅,吸收中心稍有蓝移,水的吸收深度变浅,吸收中心位置红移,绿度指数变化明显。对波谱特征及其与重金属含量的相关关系综合分析后认为,红边特征、植被指数NDV I、叶绿素吸收深度与叶片铜含量关系显著,可以作为植被铜污染遥感图像特征提取的参考。The activities of mining produce great heavy metal pollution which threatens the surrounding ecosystem and human's health,the heavy metals can be transported to the surrounding soil,river and underground water.The heavy metal's stress to the biology can cause the variation of plants and community,which is called biogeochemistry effects.The excessive copper impedes the growth and development of vegetation,such as greenness decreasing,photosynthesis weakening,and the absorption capacity of other elements decreasing.The leaves of the vegetation lack water and get withered,so the spectral characteristics change with the influence of the stress.Dexing copper mine is an oversize multi-metal mine bed in our country.The development of mining has caused the pollution of mine environment,such as the ecologic problem in mine vegetation,land,water and the heavy pollution of solid waste and tailing water,particularly,the pollution of heavy metals such as copper.These problems have influenced the growth of vegetation greatly.This paper studies the heavy metal contamination and the biogeochemistry responses of vegetation Rhus chinensis Mill in Dexing copper mine area.The spectral characteristics of the responses are systematically extracted and analyzed with the principles and methods of remote sensing biogeochemistry.Acid,Cu,Cd are the main environmental pollution factors,the copper content in the soil is much more than the national environment standard and the pH value of the water in the lower reaches of the river is about three over the year.The plant Rhus chinensis Mill has enriched and translocated responses to copper,this plant is suitable for the environmental recovery which is one of the main vegetation and grows well in the area.From spectral processing such as derivative technology,continuum-removed spectra,red edge,vegetation index,we can get that the spectral position effects are notable to the influence of heavy metals.With the increasing of the influence of heavy metal stress: (1) the spectral reflectance of Rhus

关 键 词：重金属污染 生物地球化学效应 波谱特征 盐肤木 

分 类 号：P593[天文地球—地球化学]