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当前位置: 首页 > 文章 > CO_2浓度升高对三江平原湿地小叶章碳氮含量的影响 水土保持通报 2013,33 (1) 87-91
Position: Home > Articles > Effects of Elevated CO_2 on Carbon and Nitrogen Contents of Calamagrostis Angustifolia in Wetland of Sanjiang Plain Bulletin of Soil and Water Conservation 2013,33 (1) 87-91

CO_2浓度升高对三江平原湿地小叶章碳氮含量的影响

作  者：
赵光影;刘景双;张雪萍;王洋
单  位：
黑龙江省普通高等学校地理资源与环境遥感重点实验室哈尔滨师范大学;中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室
关键词：
CO2浓度;湿地;小叶章;碳氮积累
摘  要：
利用开顶箱薰气室(open-top chamber),设置正常大气CO2浓度和高CO2浓度(700μmol/mol)2个水平和不施氮(NN,0g/m2)、常氮(MN,5g/m2)和高氮(HN,15g/m2)3个氮素水平,研究CO2浓度升高对三江平原草甸小叶章碳氮积累的影响。结果表明,CO2浓度升高条件下小叶章植株总固碳量增加,不同氮水平下小叶章总固碳量分别增加19.3%(NN),24.4%(MN)和24.6%(HN),且根固定碳量占植株总体碳库比例均有不同程度的提高。CO2浓度升高降低了小叶章各器官氮含量,其中叶、茎氮含量以抽穗期降幅最大(14.4%和19.5%),根氮含量以腊熟期降幅最大(17.4%)。小叶章各器官N含量的降低是由于CO2浓度升高条件下植株生长加快引起的稀释效应所致。
译  名：
Effects of Elevated CO_2 on Carbon and Nitrogen Contents of Calamagrostis Angustifolia in Wetland of Sanjiang Plain
作  者：
ZHAO Guang-ying1,2,LIU Jing-shuang1,ZHANG Xue-ping2,WANG Yang1(1.Key Laboratory of Wetland Ecology and Environment,Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences,Changchun,Jilin 130012,China;2.Key Laboratory of Geographic Resources and Environmental Remote Sensing of Heilongjiang Province,Harbin Normal University,Harbin,Heilongjiang 15025,China)
关键词：
elevated CO2;wetland;Calamagrostis angustifolia;carbon and nitrogen accumulation
摘  要：
An experiment with treatments differing in nitrogen supply(0,5 and 15 g/m2) and CO2 level(360 and 700 μmol/mol) with OTC(open top chamber) equipment was carried out to investigate the effects of elevated CO2 concentration on the carbon and nitrogen accumulation of Calamagrostis angustifolia in freshwater marsh of the Sanjiang Plain.Results showed that elevated CO2 concentration increased carbon fixation of plant by 19.3%,24.4% and 24.6% under the NN,MN and HN treatments,respectively.Elevated CO2 concentration also had a great impact on the carbon allocation in different parts of Calamagrostis angustifolia,as the carbon distribution in root increased to different degrees under all the nitrogen treatments.Elevated CO2 concentration reduced the nitrogen content of Calamagrostis angustifolia apparatus.The largest decrease in leaf and stem both appeared in heading period(14.4% and 19.5%),while the decrease in root appeared in dough period(17.4%).The decrease of nitrogen content in apparatus was due to diluting effect by plant speeding growth under elevated CO2 concentration.

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