模拟酸雨胁迫与植物叶片光谱反射率特征间的关系  

Relationship between Simulated Acid Rain Stress and Leaf Reflectance

作　　者：宋晓东[1] 江洪[2,3] 余树全[2] 周国模[2] 江子山[3] 

机构地区：[1]中国科学院城市环境研究所,福建厦门361021 [2]浙江林学院国际生态研究中心,浙江杭州311300 [3]南京大学国际地球系统科学研究所,江苏南京210093

出　　处：《光谱学与光谱分析》2010年第1期165-169,共5页Spectroscopy and Spectral Analysis

基　　金：科技部国际合作项目(20073819);国家重大基础研究计划项目(2005CB422207;2005CB422208)资助

摘　　要：酸雨是一个严重的全球环境问题,中国亚热带地区的严重酸雨污染对森林生态系统的健康构成了潜在的威胁。文章研究了中国亚热带地区常见的6种常绿阔叶树种幼树在不同强度的模拟酸雨(pH 2.5,pH 4.0和pH 5.6)作用下,其叶片的叶绿素含量及可见光部分的光谱反射率的变化特征。结果表明,随模拟酸雨强度的增加,受试树种在pH 2.5和pH 4.0处理下的叶绿素含量均高于pH 5.6的处理;而可见光部分的光谱反射率则普遍低于pH 5.6的处理;pH 2.5和pH 4.0间的差异无显著规律。在经不同强度模拟酸雨作用后,各树种叶片在可见光部分的光谱反射率的差异主要集中在绿光反射峰及红边附近。受试树种对酸雨胁迫均表现出了一定的耐受性,较强的酸雨可在一定程度上对植物生长起到正的生物效应。Acid rain is a worldwide environmental problem. Serious acid rain pollution in subtropical China has constituted a potential threat to the health of the local forest. In the present paper, the changing properties of the chlorophyll concentration and spectral reflectance at the visible wavelengths for the six subtropical broad-leaved tree species＇ leaves under simulated acid rain （SAR） treatment with different pH levels were studied. With the increasing strength of the SAR, the chlorophyll concentrations of the experimental species under pH 2.5 and pH 4. 0 treatment were higher than that under pH 5.6; the spectral reflectance at the visible wavelengths for pH 2.5 and pH 4. 0 were lower than that for pH 5.6 in general; while there weren＇ t significant differences between pH 2.5 and pH 4. 0. After the treatment with different levels of SAR, the differences in spectral reflectanceat the visible wavelengths mainly focused around the green peak and red edge on the reflectance curve. The subtropical broadleaved tree species studied were relatively not sensitive to acid rain stresses; some stronger acid rain may accelerate the growth of the tree species used here to some extent.

关 键 词：酸雨 叶绿素 光谱反射率 常绿阔叶树 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]