ICP-AES法研究葎草叶中微量元素对大气活性氮浓度的响应  

Study on the Response of Middle and Trace Elements in Humulus Scandens Leaves to Atmospheric Reactive Nitrogen with ICP-AES

作　　者：韩文轩[1] 黄明丽[1] 唐傲寒[1] 沈健林[1] 汪斯淼[1] 刘学军[1] 张福锁[1] 

机构地区：[1]中国农业大学资源与环境学院,教育部植物-土壤相互作用重点实验室,农业部植物营养学重点开放实验室,北京100193

出　　处：《光谱学与光谱分析》2009年第12期3399-3401,共3页Spectroscopy and Spectral Analysis

基　　金：农业部公益性行业计划项目(200803030);中国农业大学科研启动基金项目(2007021);国家大学生科研创新计划项目(10080521)资助

摘　　要：在实测数据的基础上,分析大气活性氮对野生植物葎草(Humulus scandens)中微量元素含量的影响。采集华北平原北京周边6个地点的葎草,利用等离子体原子发射光谱技术(ICP-AES)分析植物叶中Ca,Mg,S,Fe,Mn,Cu,Zn,B和Na的含量。结果表明,葎草叶中各元素的平均含量由高到低依次为Ca(41106)>S(8370)>Mg(6628)>Fe(476)>Na(92)>B(78)>Mn(49)>Zn(38)>Cu(15)mg.kg-1干重;不同大气活性氮浓度下葎草叶中微量元素含量没有显著差异:说明大气活性氮施肥效应造成的葎草对这些元素需求量的增加,并未超过当地土壤营养元素的供应能力。该实验结果将为研究全球大气氮沉降增加背景下,陆生草本植物的中微量元素营养状况提供科学参考。Based on field measurements,the effects of atmospheric reactive nitrogen（ARN）on the middle/trace element concentrations in the leaves of wild plant humulus scandens were analyzed.Leaves of H.scandens were collected from six sites around Beijing in the North China Plain,and the concentrations of Ca,Mg,S,Fe,Mn,Cu,Zn,B,and Na in the leaves were determined with inductively coupled plasma atomic emission spectrometry（ICP-AES）.The results showed that element concentrations in leaves ranked as Ca（41 106）〉S（8 370）〉Mg（6 628）〉Fe（476）〉Na（92）〉B（78）〉Mn（49）〉Zn（38）〉Cu（15）mg·kg-1 dry matter;There were no significant difference in any of the individual element in the H.scandens leaves along the gradient of ARN,suggesting that the increasing demand of H.scandens for middle/trace elements,induced by the enhanced nitrogen availability from ARN,was not yet beyond the nutrient-supply limits of the local soils.This study offers reference to scientific assessments of the middle/trace element status in terrestrial herbaceous plants under the global background of increasing nitrogen deposition.

关 键 词：大气氮沉降 中微量元素 葎草 ICP-AES 

分 类 号：O657.3[理学—分析化学] Q143.4[理学—化学]